一、前言
1、pta题目集6总结
本次题目集主要是根据类图,写电信计费的座机计费,难度并不是特别大,但是因为是电信计费的基础,为了后续方便需要对本次作业有较深的了解,要条理清晰。
2、pta题目集7总结
本次题目是在题目集六的基础上,加上了手机计费,相对于上一次的题目难度加大,手机计费的情况变多,在判断时需要考虑的更多,另外两道题相对来说就比较简单了。
3、pta题目集8总结
本次题目集相对于题目集7来说,就计较简单了,短信计费的形式较少,同时本题的测试点只考察短信计费,所以相对来说就简单了,另外两道题基本可以根据题目意思直接编写并不是很难。
二、设计与分析
1、pta题目集6
1)7-1 电信计费系列1-座机计费
实现一个简单的电信计费程序:
假设南昌市电信分公司针对市内座机用户采用的计费方式:
月租20元,接电话免费,市内拨打电话0.1元/分钟,省内长途0.3元/分钟,国内长途拨打0.6元/分钟。不足一分钟按一分钟计。
南昌市的区号:0791,江西省内各地市区号包括:0790~0799以及0701。
输入格式:
输入信息包括两种类型
1、逐行输入南昌市用户开户的信息,每行一个用户,
格式:u-号码 计费类型 (计费类型包括:0-座机 1-手机实时计费 2-手机A套餐)
例如:u-079186300001 0
座机号码除区号外由是7-8位数字组成。
本题只考虑计费类型0-座机计费,电信系列2、3题会逐步增加计费类型。
2、逐行输入本月某些用户的通讯信息,通讯信息格式:
座机呼叫座机:t-主叫号码 接听号码 起始时间 结束时间
t-079186330022 058686330022 2022.1.3 10:00:25 2022.1.3 10:05:11
以上四项内容之间以一个英文空格分隔,
时间必须符合"yyyy.MM.dd HH:mm:ss"格式。提示:使用SimpleDateFormat类。
以上两类信息,先输入所有开户信息,再输入所有通讯信息,最后一行以“end”结束。
注意:
本题非法输入只做格式非法的判断,不做内容是否合理的判断(时间除外,否则无法计算),比如:
1、输入的所有通讯信息均认为是同一个月的通讯信息,不做日期是否在同一个月还是多个月的判定,直接将通讯费用累加,因此月租只计算一次。
2、记录中如果同一电话号码的多条通话记录时间出现重合,这种情况也不做判断,直接 计算每条记录的费用并累加。
3、用户区号不为南昌市的区号也作为正常用户处理。
输出格式:
根据输入的详细通讯信息,计算所有已开户的用户的当月费用(精确到小数点后2位,
单位元)。假设每个用户初始余额是100元。
每条通讯信息单独计费后累加,不是将所有时间累计后统一计费。
格式:号码+英文空格符+总的话费+英文空格符+余额
每个用户一行,用户之间按号码字符从小到大排序。
错误处理:
输入数据中出现的不符合格式要求的行一律忽略。
建议类图:
参见图1、2、3,可根据理解自行调整:
源码如下:
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
import java.text.DecimalFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.*; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static void main(String[] args) { Inputdeal inputdeal = new Inputdeal(); ArrayList<User> users = new ArrayList<>(); Scanner in = new Scanner(System.in); String input = in.nextLine(); while (!input.equals("end")) { if (1 == inputdeal.check(input)) { inputdeal.writeUser(users, input); } else if (2 == inputdeal.check(input)) { inputdeal.writeRecord(users, input); } input = in.nextLine(); } users.sort(new Comparator<User>() { @Override public int compare(User u1, User u2) { if (Double.parseDouble(u1.getNumber()) > Double.parseDouble(u2.getNumber())) { return 1; } else { return -1; } } }); for (User u : users) { System.out.println(u.getNumber()+" "+ OutFormat.doubleFormat(u.calCost())+" "+ OutFormat.doubleFormat(u.calBalance())); } } } class OutFormat { public static Double doubleFormat(double b){ DecimalFormat df=new DecimalFormat("#.0"); Double output=Double.valueOf(df.format(b)); return output; } } class Inputdeal{ public static int check(String input) { String[] p= input.split(" "); if(p.length==2) { if (p[0].matches("^u-[0-9]{11,12}$")) { if(Integer.parseInt(p[1])>=0&&Integer.parseInt(p[1])<=2) return 1; } } else if (p.length==6) { if(datatf(p[2])) if(timetf(p[3])) if(datatf(p[4])) if(timetf(p[5])) { if(p[0].matches("^t-0791[0-9]{7,8}$")) if(p[1].matches(".[0-9]{9,11}")) return 2; } } return 0; } public static boolean timetf(String time)//判断输入时间格式是否正确 { if(time.matches("^([0-1][0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9])$")) { return true; }else return false; } public static boolean datatf(String data)//判断日期格式是否正确 { Pattern p=Pattern.compile("\\d{4}+[\\.]\\d{1,2}+[\\.]\\d{1,2}+"); Matcher m=p.matcher(data); if(!m.matches()){ return false; } String[] datas=data.split("\\."); int year=Integer.parseInt(datas[0]); int month=Integer.parseInt(datas[1]); int day=Integer.parseInt(datas[2]); if(month<1||month>12) return false; int[] months=new int[]{0,31,28,31,30,31,30,31,31,30,31,30,31}; if(month==2) { if(isyear(year)) months[2]=29; else months[2]=28; } int monthlength=months[month]; if(day<1||day>monthlength) return false; return true; } public static boolean isyear(int year)//判断是否为闰年 { if((year%4==0&&year%100!=0)||year%400==0) return true; else return false; } //添加新用户 public void writeUser(ArrayList<User> users, String input) { User usernew = new User(); String[] inputs = input.split(" "); String num = inputs[0].substring(2); for (User i : users) { if (i.getNumber().equals(num)) { return; } } usernew.setNumber(num); int mode = Integer.parseInt(inputs[1]); if (mode == 0) { usernew.setChargeMode(new LandlinePhoneCharging()); } users.add(usernew); } public void writeRecord(ArrayList<User> users, String input) { String[] inputs = input.split(" "); inputs[0] = inputs[0].replace("t-", ""); User callu = null, answeru = null; CallRecord callrecord = new CallRecord(inputs); for (User i : users) { if (i.getNumber().equals(inputs[0])) { callu = i; } if (i.getNumber().equals(inputs[1])) { answeru = i; } if (callu != null && answeru != null) { break; } } if (callu != null) { if (callrecord.getCallType() == 1) { callu.getUserRecords().addCallingInCityRecords(callrecord); } else if (callrecord.getCallType() == 2) { callu.getUserRecords().addCallingInProvinceRecords(callrecord); } else { callu.getUserRecords().addCallingInLandRecords(callrecord); } } if (answeru != null) { if (callrecord.getCallType() == 1) { answeru.getUserRecords().addAnswerInCityRecords(callrecord); } else if (callrecord.getCallType() == 2) { answeru.getUserRecords().addAnswerInProvinceRecords(callrecord); } else { answeru.getUserRecords().addAnswerInLandRecords(callrecord); } } } } ////包括3种拨打记录和3种接听记录和2种短信记录,用户记录类 class UserRecords{ private ArrayList<CallRecord> callingInCityRecords=new ArrayList<CallRecord>(); private ArrayList<CallRecord> callingInProvinceRecords = new ArrayList<CallRecord>(); private ArrayList<CallRecord> callingInLandRecords = new ArrayList<CallRecord>(); private ArrayList<CallRecord> answerInCityRecords = new ArrayList<CallRecord>(); private ArrayList<CallRecord> answerInProvinceRecords = new ArrayList<CallRecord>(); private ArrayList<CallRecord> answerInLandRecords = new ArrayList<CallRecord>(); private ArrayList<MessageRecord> sendMessageRecords = new ArrayList<MessageRecord>(); private ArrayList<MessageRecord> receiveMessageRecords = new ArrayList<MessageRecord>(); public UserRecords() { } public void addCallingInCityRecords(CallRecord callRecord) { this.callingInCityRecords.add(callRecord); } public void addCallingInProvinceRecords(CallRecord callRecord) { this.callingInProvinceRecords.add(callRecord); } public void addCallingInLandRecords(CallRecord callRecord) { this.callingInLandRecords.add(callRecord); } public void addAnswerInCityRecords(CallRecord callRecord) { this.answerInCityRecords.add(callRecord); } public void addAnswerInProvinceRecords(CallRecord callRecord) { this.answerInProvinceRecords.add(callRecord); } public void addAnswerInLandRecords(CallRecord callRecord) { this.answerInLandRecords.add(callRecord); } public void addSendMessageRecords (MessageRecord messageRecord) { this.sendMessageRecords.add(messageRecord); } public void addReceiveMessageRecords (MessageRecord messageRecord) { this.receiveMessageRecords.add(messageRecord); } public ArrayList<MessageRecord> getSendMessageRecords(){ return this.sendMessageRecords; } public ArrayList<MessageRecord> getReceiveMessageRecords(){ return this.receiveMessageRecords; } public ArrayList<CallRecord> getCallingInCityRecords(){ return this.callingInCityRecords; } public ArrayList<CallRecord> getCallingInProvinceRecords(){ return this.callingInProvinceRecords; } public ArrayList<CallRecord> getCallingInLandRecords(){ return this.callingInLandRecords; } public ArrayList<CallRecord> getAnswerInCityRecords(){ return this.answerInCityRecords; } public ArrayList<CallRecord> getAnswerInProvinceRecords(){ return this.answerInProvinceRecords; } public ArrayList<CallRecord> getAnswerInLandRecords(){ return this.answerInLandRecords; } } //用户类 class User{ private UserRecords userRecords = new UserRecords();//用户记录 private double balance = 100;//余额 private ChargeMode chargeMode;//计费方式 private String number;//号码 public User(Inputdeal inputHandle) { } public User() { } public double calBalance() { this.balance = this.getBalance()-this.calCost()-this.chargeMode.getMonthlyRent(); return this.balance; } public double calCost() { return this.chargeMode.calCost(this.userRecords); } public UserRecords getUserRecords() { return this.userRecords; } public void setUserRecords(UserRecords userRecords) { this.userRecords=userRecords; } public double getBalance() { return this.balance; } public void setChargeMode(ChargeMode chargeMode) { this.chargeMode=chargeMode; } public ChargeMode getChargeMode() { return this.chargeMode; } public void setNumber(String number) { this.number=number; } public String getNumber() { return this.number; } } abstract class ChargeMode { private ArrayList<ChargeRule> chargeRules = new ArrayList<ChargeRule>(); public ArrayList<ChargeRule> getChargeRule(){ return this.chargeRules; } public void setChargeRule(ArrayList<ChargeRule> chargeRules) { this.chargeRules=chargeRules; } public double calCost(UserRecords userRecords) { return 0; } public double getMonthlyRent() { return 0; } } class LandlinePhoneCharging extends ChargeMode{ private double monthlyRent=20; @Override public double calCost(UserRecords userRecords){ double s=0; CallChargeRule c = new LandPhoneInCityRule(); CallChargeRule p = new LandPhoneInProvinceRule(); CallChargeRule l = new LandPhoneInLandRule(); s+=c.calCost(userRecords.getCallingInCityRecords()); s+=p.calCost(userRecords.getCallingInProvinceRecords()); s+=l.calCost(userRecords.getCallingInLandRecords()); return s; } @Override public double getMonthlyRent() { return this.monthlyRent; } } abstract class CommunicationRecord { String callingNumber; String answerNumber; public String getCallingNumber(){ return callingNumber; } public void setCallingNumber(String callingNumber) { this.callingNumber=callingNumber; } public String getAnswerNumber() { return answerNumber; } public void setAnswerNumber(String answerNumber) { this.answerNumber = answerNumber; } } class CallRecord extends CommunicationRecord{ private Date startTime = new Date(); private Date endTime = new Date(); private String callingAddressAreaCode; private String answerAddressAreaCode; public CallRecord(){ } public int getCallType() { if (callingAddressAreaCode.equals(answerAddressAreaCode)) { return 1; } if (callingAddressAreaCode.matches("^079[0-9]$") || callingAddressAreaCode.equals("0701")) { if (answerAddressAreaCode.matches("^079[0-9]$") || answerAddressAreaCode.equals("0701")) { return 2; } } return 3; } public CallRecord(String[] inputs) { super(); if (inputs[0].length() == 10) { callingAddressAreaCode = inputs[0].substring(0, 3); } else { callingAddressAreaCode = inputs[0].substring(0, 4); } if (inputs[1].length() == 10) { answerAddressAreaCode = inputs[1].substring(0, 3); } else { answerAddressAreaCode = inputs[1].substring(0, 4); } SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss", Locale.getDefault()); try { startTime = simpleDateFormat.parse(inputs[2] + " " + inputs[3]); endTime = simpleDateFormat.parse(inputs[4] + " " + inputs[5]); } catch (ParseException e) { } } public CallRecord(Date startTime, Date endTime, String callingAddressAreaCode, String answerAddressAreaCode) { super(); this.startTime = startTime; this.endTime = endTime; this.callingAddressAreaCode = callingAddressAreaCode; this.answerAddressAreaCode = answerAddressAreaCode; } public Date getStartTime() { return this.startTime; } public void setStartTime(Date startTime) { this.startTime=startTime; } public Date getEndTime() { return this.endTime; } public void setEndTime(Date endTime) { this.endTime=endTime; } public String getCallingAddressAreaCode() { return this.callingAddressAreaCode; } public void setCallingAddressAreaCode(String callingAddressAreaCode) { String s = callingAddressAreaCode.substring(0, 4); this.callingAddressAreaCode=s; } public String getAnswerAddressAreaCode() { return this.answerAddressAreaCode; } public void setAnswerAddressAreaCode(String answerAddressAreaCode) { String s = answerAddressAreaCode.substring(0, 4); this.answerAddressAreaCode=s; } } class MessageRecord extends CommunicationRecord{ private String message; public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } } abstract class ChargeRule { } abstract class CallChargeRule extends ChargeRule{ public double calCost(ArrayList<CallRecord> callRecords){ return 0; } } //座机拨打室内电话计费 class LandPhoneInCityRule extends CallChargeRule{ @Override public double calCost(ArrayList<CallRecord> callRecords) { double s=0; for(CallRecord k: callRecords) { long time1 = k.getStartTime().getTime(); long time2 = k.getEndTime().getTime(); long time = Math.abs(time1-time2); if(time/1000%60==0) { double minute = (double)(time/1000/60); s=s+0.1*minute; } else { double minute = (double)(time/1000/60); s=s+0.1*(minute+1); } } return s; } } //座机拨打省内电话计费 class LandPhoneInProvinceRule extends CallChargeRule{ @Override public double calCost(ArrayList<CallRecord> callRecords){ double fee=0; for(int i=0;i<callRecords.size();i++) { long totaltime=callRecords.get(i).getEndTime().getTime()-callRecords.get(i).getStartTime().getTime(); if(totaltime/1000%60==0){ double m=(double)(totaltime/1000/60); fee+=0.3*m; }else { double m=(double)(totaltime/1000/60); fee=fee+0.3*(m+1); } } return fee; } } //座机拨打国内电话计费 class LandPhoneInLandRule extends CallChargeRule{ @Override public double calCost(ArrayList<CallRecord> callRecords) { double s=0; for(CallRecord k: callRecords) { long time1 = k.getStartTime().getTime(); long time2 = k.getEndTime().getTime(); long time = Math.abs(time1-time2); if(time/1000%60==0) { double minute = (double)(time/1000/60); s=s+0.6*minute; } else { double minute = (double)(time/1000/60); s=s+0.6*(minute+1); } } return s; } }View Code
心得:本次电信计费题目主要是关于座机计费,形式比较单一,相对来说比较好写,主要是根据类图进行编写,一开始写的还是比较顺畅的,后面过测试点的时候就不好了,总有一些错误,然后只能一点一点的修改,本题最大的难点在于输入格式的判断,这个时候就需要进行很多分析,大体来说难度没有特别大。
2)7-2 多态测试
定义容器Container接口。模拟实现一个容器类层次结构,并进行接口的实现、抽象方法重写和多态机制测试。各容器类实现求表面积、体积的方法。- 定义接口Container:
属性:
public static final double pi=3.1415926;
抽象方法:
public abstract double area();
public abstract double volume();
static double sumofArea(Container c[]);
static double sumofVolume(Container c[]);
其中两个静态方法分别计算返回容器数组中所有对象的面积之和、周长之和; - 定义Cube类、Cylinder类均实现自Container接口。
Cube类(属性:边长double类型)、Cylinder类(属性:底圆半径、高,double类型)。
输入格式:
第一行n表示对象个数,对象类型用cube、cylinder区分,cube表示立方体对象,后面输入边长,输入cylinder表示圆柱体对象,后面是底圆半径、高。
输出格式:
分别输出所有容器对象的表面积之和、体积之和,结果保留小数点后2位。
输入样例:
在这里给出一组输入。例如:
4
cube
15.7
cylinder
23.5 100
cube
46.8
cylinder
17.5 200
输出样例:
在这里给出相应的输出。例如:
56771.13
472290.12
类图如下:
![](/i/l/?n=23&i=blog/2992567/202212/2992567-20221203231616201-190130777.png)
![](/i/l/?n=23&i=blog/2992567/202212/2992567-20221203234220431-2128878007.png)
源码如下:
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
import java.util.Scanner; public class Main { public static void main(String[] args){ Scanner s= new Scanner(System.in); int n=s.nextInt(); Rqi[] d=new Rqi[n]; for (int i=0;i<n;i++) { String str=s.next(); if(str.equals("cube")) { d[i]=new Cube(s.nextDouble()); } else if (str.equals("cylinder")) { d[i]=new Cylinder(s.nextDouble(),s.nextDouble()); } } double sv=0; double sa=0; for (Rqi i: d) { sv+=i.volume(); sa+=i.area(); } System.out.printf("%.2f\n",sa); System.out.printf("%.2f",sv); } } abstract class Rqi implements Container{} class Cube extends Rqi{//立方体 private double l; public Cube (double l) { this.l=l; } public double volume() { return l*l*l; } public double area(){ return 6*l*l; } } class Cylinder extends Rqi{ private double r; private double h; public Cylinder(double r,double h) { super(); this.r = r; this.h = h; } public double volume() { return pi*r*r*h; } public double area() { return pi * r * r * 2 + 2 * pi * r * h; } } interface Container{ public static final double pi=3.1415926; public abstract double area(); public abstract double volume(); static double sumofArea(Container c[]) { double s=0; for (Container i:c) { s+=i.area(); } return s; } static double sumofVolume(Container c[]) { double s=0; for (Container i:c) { s+=i.volume(); } return s; } }View Code
心得:本题难度并不大,主要是多态的一些认识,根据题目意思基本可以写出来。
2、pta题目集7
1)7-1 电信计费系列2-手机+座机计费
实现南昌市电信分公司的计费程序,假设该公司针对手机和座机用户分别采取了两种计费方案,分别如下:
1、针对市内座机用户采用的计费方式(与电信计费系列1内容相同):
月租20元,接电话免费,市内拨打电话0.1元/分钟,省内长途0.3元/分钟,国内长途拨打0.6元/分钟。不足一分钟按一分钟计。
假设本市的区号:0791,江西省内各地市区号包括:0790~0799以及0701。
2、针对手机用户采用实时计费方式:
月租15元,市内省内接电话均免费,市内拨打市内电话0.1元/分钟,市内拨打省内电话0.2元/分钟,市内拨打省外电话0.3元/分钟,省内漫游打电话0.3元/分钟,省外漫游接听0.3元/分钟,省外漫游拨打0.6元/分钟;
注:被叫电话属于市内、省内还是国内由被叫电话的接听地点区号决定,比如以下案例中,南昌市手机用户13307912264在区号为020的广州接听了电话,主叫号码应被计算为拨打了一个省外长途,同时,手机用户13307912264也要被计算省外接听漫游费:
u-13307912264 1
t-079186330022 13307912264 020 2022.1.3 10:00:25 2022.1.3 10:05:11
输入:
输入信息包括两种类型
1、逐行输入南昌市用户开户的信息,每行一个用户,含手机和座机用户
格式:u-号码 计费类型 (计费类型包括:0-座机 1-手机实时计费 2-手机A套餐)
例如:u-079186300001 0
座机号码由区号和电话号码拼接而成,电话号码包含7-8位数字,区号最高位是0。
手机号码由11位数字构成,最高位是1。
本题在电信计费系列1基础上增加类型1-手机实时计费。
手机设置0或者座机设置成1,此种错误可不做判断。
2、逐行输入本月某些用户的通讯信息,通讯信息格式:
座机呼叫座机:t-主叫号码 接听号码 起始时间 结束时间
t-079186330022 058686330022 2022.1.3 10:00:25 2022.1.3 10:05:11
以上四项内容之间以一个英文空格分隔,
时间必须符合"yyyy.MM.dd HH:mm:ss"格式。提示:使用SimpleDateFormat类。
输入格式增加手机接打电话以及收发短信的格式,手机接打电话的信息除了号码之外需要额外记录拨打/接听的地点的区号,比如:
座机打手机:
t-主叫号码 接听号码 接听地点区号 起始时间 结束时间
t-079186330022 13305862264 020 2022.1.3 10:00:25 2022.1.3 10:05:11
手机互打:
t-主叫号码 拨号地点 接听号码 接听地点区号 起始时间 结束时间
t-18907910010 0791 13305862264 0371 2022.1.3 10:00:25 2022.1.3 10:05:11
注意:以上两类信息,先输入所有开户信息,再输入所有通讯信息,最后一行以“end”结束。
输出:
根据输入的详细通讯信息,计算所有已开户的用户的当月费用(精确到小数点后2位,单位元)。假设每个用户初始余额是100元。
每条通讯、短信信息均单独计费后累加,不是将所有信息累计后统一计费。
格式:号码+英文空格符+总的话费+英文空格符+余额
每个用户一行,用户之间按号码字符从小到大排序。
错误处理:
输入数据中出现的不符合格式要求的行一律忽略。
类图:
源码如下:
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
import java.util.ArrayList; import java.util.Comparator; import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; import java.math.BigDecimal; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Locale; import java.text.ParseException; public class Main { public static void main(String[] args) { Outputtool outputtool = new Outputtool(); Inputdeal inputdeal = new Inputdeal(); ArrayList<User> users = new ArrayList<>(); Scanner in = new Scanner(System.in); String input = in.nextLine(); while (!input.equals("end")) { if (1 == inputdeal.check(input)) { inputdeal.writeUser(users, input); } else if (2 == inputdeal.check(input)) { inputdeal.writeRecord(users, input); } input = in.nextLine(); } users.sort(new Comparator<User>() { @Override public int compare(User u1, User u2) { if (u1.getNumber().charAt(0) == '0' && u2.getNumber().charAt(0) != '0') { return -1; } else if (u1.getNumber().charAt(0) != '0' && u2.getNumber().charAt(0) == '0') { return 1; } if (Double.parseDouble(u1.getNumber()) > Double.parseDouble(u2.getNumber())) { return 1; } else { return -1; } } }); for (User u : users) { System.out.print(u.getNumber() + " "); outputtool.output(u.calCost()); System.out.print(" "); outputtool.output(u.calBalance()); System.out.println(); } } } abstract class ChargeMode { protected ArrayList<ChargeRule> chargeRules = new ArrayList<>(); public abstract double calCost(UserRecords userRecords); public abstract double getMonthlyRent(); public ArrayList<ChargeRule> getChargeRules() { return chargeRules; } public void setChargeRules(ArrayList<ChargeRule> chargeRules) { this.chargeRules = chargeRules; } } class UserRecords { private ArrayList<CallRecord> callingInCityRecords = new ArrayList<CallRecord>(); private ArrayList<CallRecord> callingInProvinceRecords = new ArrayList<CallRecord>(); private ArrayList<CallRecord> callingInLandRecords = new ArrayList<CallRecord>(); private ArrayList<CallRecord> answerInCityRecords = new ArrayList<CallRecord>(); private ArrayList<CallRecord> answerInProvinceRecords = new ArrayList<CallRecord>(); private ArrayList<CallRecord> answerInLandRecords = new ArrayList<CallRecord>(); public void addCallingInCityRecords(CallRecord callRecord) { callingInCityRecords.add(callRecord); } public void addCallingInProvinceRecords(CallRecord callRecord) { callingInProvinceRecords.add(callRecord); } public void addCallingInLandRecords(CallRecord callRecord) { callingInLandRecords.add(callRecord); } public void addAnswerInCityRecords(CallRecord callRecord) { answerInCityRecords.add(callRecord); } public void aaddAnswerInProvinceRecords(CallRecord callRecord) { answerInProvinceRecords.add(callRecord); } public void addAnswerInLandRecords(CallRecord callRecord) { answerInLandRecords.add(callRecord); } public ArrayList<CallRecord> getCallingInCityRecords() { return callingInCityRecords; } public void setCallingInCityRecords(ArrayList<CallRecord> callingInCityRecords) { this.callingInCityRecords = callingInCityRecords; } public ArrayList<CallRecord> getCallingInProvinceRecords() { return callingInProvinceRecords; } public void setCallingInProvinceRecords(ArrayList<CallRecord> callingInProvinceRecords) { this.callingInProvinceRecords = callingInProvinceRecords; } public ArrayList<CallRecord> getCallingInLandRecords() { return callingInLandRecords; } public void setCallingInLandRecords(ArrayList<CallRecord> callingInLandRecords) { this.callingInLandRecords = callingInLandRecords; } public ArrayList<CallRecord> getAnswerInCityRecords() { return answerInCityRecords; } public void setAnswerInCityRecords(ArrayList<CallRecord> answerInCityRecords) { this.answerInCityRecords = answerInCityRecords; } public ArrayList<CallRecord> getAnswerInProvinceRecords() { return answerInProvinceRecords; } public void setAnswerInProvinceRecords(ArrayList<CallRecord> answerInProvinceRecords) { this.answerInProvinceRecords = answerInProvinceRecords; } public ArrayList<CallRecord> getAnswerInLandRecords() { return answerInLandRecords; } public void setAnswerInLandRecords(ArrayList<CallRecord> answerInLandRecords) { this.answerInLandRecords = answerInLandRecords; } } class LandlinePhoneCharging extends ChargeMode { private double monthlyRent = 20; public LandlinePhoneCharging() { super(); chargeRules.add(new LandPhoneInCityRule()); chargeRules.add(new LandPhoneInProvinceRule()); chargeRules.add(new LandPhoneInlandRule()); } @Override public double calCost(UserRecords userRecords) { double sumCost = 0; for (ChargeRule rule : chargeRules) { sumCost += rule.calCost(userRecords); } return sumCost; } @Override public double getMonthlyRent() { return monthlyRent; } } class MobilePhoneCharging extends ChargeMode { private double monthlyRent = 15; public MobilePhoneCharging() { super(); chargeRules.add(new MobilePhoneInCityRule()); chargeRules.add(new MobilePhoneInProvinceRule()); chargeRules.add(new MobilePhoneInlandRule()); } @Override public double calCost(UserRecords userRecords) { double sumCost = 0; for (ChargeRule rule : chargeRules) { sumCost += rule.calCost(userRecords); } return sumCost; } @Override public double getMonthlyRent() { return monthlyRent; } } class Inputdeal { public int check(String input) { if (input.matches("[u]-0791[0-9]{7,8}\\s[0]") || input.matches("[u]-1[0-9]{10}\\s[1]")) { return 1; } else if (input.matches("(([t]-0791[0-9]{7,8}\\s" + "0[0-9]{9,11}\\s)|" + "([t]-0791[0-9]{7,8}\\s" + "1[0-9]{10}\\s" + "0[0-9]{2,3}\\s)|" + "([t]-1[0-9]{10}\\s" + "0[0-9]{2,3}\\s" + "0[0-9]{9,11}\\s)|" + "([t]-1[0-9]{10}\\s" + "0[0-9]{2,3}\\s" + "1[0-9]{10}\\s" + "0[0-9]{2,3}\\s))" + "((([0-9]{3}[1-9]|[0-9]{2}[1-9][0-9]|[0-9][1-9][0-9]{2}|[1-9][0-9]{3})\\.(((0?[13578]|1[02])\\.(0?" + "[1-9]|[12][0-9]|3[01]))|(([469]|11)\\.([1-9]|[12][0-9]|30))|(2\\.([1-9]|[1][0-9]|2[0-8]))))|(((" + "[0-9]{2})([48]|[2468][048]|[13579][26])|(([48]|[2468][048]|[3579][26])00))\\.2\\.29))" + "\\s([0-1]?[0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9])\\s" + "((([0-9]{3}[1-9]|[0-9]{2}[1-9][0-9]|[0-9][1-9][0-9]{2}|[1-9][0-9]{3})\\.((([13578]|1[02])\\.(" + "[1-9]|[12][0-9]|3[01]))|(([469]|11)\\.([1-9]|[12][0-9]|30))|(2\\.([1-9]|[1][0-9]|2[0-8]))))|(((" + "[0-9]{2})([48]|[2468][048]|[13579][26])|(([48]|[2468][048]|[3579][26])00))\\.2\\.29))" + "\\s([0-1]?[0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9])")) { return 2; } return 0; } @SuppressWarnings("unused") private boolean validatet(String string) { if (!string.matches("^([0-1]?[0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9])$")) { return false; } return true; } public static boolean validate(String dateString) { // 使用正则表达式 测试 字符 符合 dddd.dd.dd 的格式(d表示数字) Pattern p = Pattern.compile("\\d{4}+[\\.]\\d{1,2}+[\\.]\\d{1,2}+"); Matcher m = p.matcher(dateString); if (!m.matches()) { return false; } // 得到年月日 String[] array = dateString.split("\\."); int year = Integer.valueOf(array[0]); int month = Integer.valueOf(array[1]); int day = Integer.valueOf(array[2]); if (month < 1 || month > 12) { return false; } int[] monthLengths = new int[] { 0, 31, -1, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; if (isLeapYear(year)) { monthLengths[2] = 29; } else { monthLengths[2] = 28; } int monthLength = monthLengths[month]; if (day < 1 || day > monthLength) { return false; } return true; } /** 是否是闰年 */ private static boolean isLeapYear(int year) { return ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0); } public void writeUser(ArrayList<User> users, String input) { User usernew = new User(); String[] inputs = input.split(" "); String num = inputs[0].substring(2); for (User i : users) { if (i.getNumber().equals(num)) { return; } } usernew.setNumber(num); int mode = Integer.parseInt(inputs[1]); if (mode == 0) { usernew.setChargeMode(new LandlinePhoneCharging()); } else if (mode == 1) { usernew.setChargeMode(new MobilePhoneCharging()); } users.add(usernew); } public void writeRecord(ArrayList<User> users, String input) { String[] inputs = input.split(" "); User callu = null, answeru = null; CallRecord callrecord = new CallRecord(inputs); if (input.charAt(0) == 't') { String out = inputs[0]; String in = ""; if (inputs.length == 6) { in = inputs[1]; } else if (inputs.length == 7) { in = inputs[1]; } else if (inputs.length == 8) { in = inputs[2]; } for (User i : users) { if (i.getNumber().equals(out)) { callu = i; } if (i.getNumber().equals(in)) { answeru = i; } if (callu != null && answeru != null) { break; } } if (callu != null) { if (callrecord.getCallType().matches("^1[1-3]$")) { callu.getUserRecords().addCallingInCityRecords(callrecord); } else if (callrecord.getCallType().matches("^2[1-3]$")) { callu.getUserRecords().addCallingInProvinceRecords(callrecord); } else { callu.getUserRecords().addCallingInLandRecords(callrecord); } } if (answeru != null) { if (callrecord.getCallType().matches("^[1-3]1$")) { answeru.getUserRecords().addAnswerInCityRecords(callrecord); } else if (callrecord.getCallType().matches("^[1-3]2$")) { answeru.getUserRecords().aaddAnswerInProvinceRecords(callrecord); } else { answeru.getUserRecords().addAnswerInLandRecords(callrecord); } } } else if (input.charAt(0) == 'm') { } } } abstract class CommunicationRecord { protected String callingNumber; protected String answerNumbe; public String getCallingNumber() { return callingNumber; } public void setCallingNumber(String callingNumber) { this.callingNumber = callingNumber; } public String getAnswerNumbe() { return answerNumbe; } public void setAnswerNumbe(String answerNumbe) { this.answerNumbe = answerNumbe; } } abstract class ChargeRule { abstract public double calCost(UserRecords userRecords); } class CallRecord extends CommunicationRecord { private Date startTime; private Date endTime; private String callingAddressAreaCode; private String answerAddressAreaCode; public String getCallType() { String type = ""; if (callingAddressAreaCode.equals("0791")) { type = type.concat("1"); } else if (callingAddressAreaCode.matches("^079[023456789]$") || callingAddressAreaCode.equals("0701")) { type = type.concat("2"); } else { type = type.concat("3"); } if (answerAddressAreaCode.equals("0791")) { type = type.concat("1"); } else if (answerAddressAreaCode.matches("^079[023456789]$") || answerAddressAreaCode.equals("0701")) { type = type.concat("2"); } else { type = type.concat("3"); } return type; } public CallRecord(String[] inputs) { super(); char type = inputs[0].charAt(0); inputs[0] = inputs[0].substring(2); String sd = null, st = null, ed = null, et = null; if (type == 't') { if (inputs.length == 6) { sd = inputs[2]; st = inputs[3]; ed = inputs[4]; et = inputs[5]; callingAddressAreaCode = inputs[0].substring(0, 4); answerAddressAreaCode = inputs[1].substring(0, 4); } else if (inputs.length == 7) { sd = inputs[3]; st = inputs[4]; ed = inputs[5]; et = inputs[6]; if (inputs[0].charAt(0) != '0') { if (inputs[2].length() == 10) { answerAddressAreaCode = inputs[2].substring(0, 3); } else { answerAddressAreaCode = inputs[2].substring(0, 4); } callingAddressAreaCode = inputs[1]; } else { if (inputs[0].length() == 10) { callingAddressAreaCode = inputs[0].substring(0, 3); } else { callingAddressAreaCode = inputs[0].substring(0, 4); } answerAddressAreaCode = inputs[2]; } } else if (inputs.length == 8) { sd = inputs[4]; st = inputs[5]; ed = inputs[6]; et = inputs[7]; callingAddressAreaCode = inputs[1]; answerAddressAreaCode = inputs[3]; } } else if (type == 'm') { } SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss", Locale.getDefault()); try { startTime = simpleDateFormat.parse(sd + " " + st); endTime = simpleDateFormat.parse(ed + " " + et); } catch (ParseException e) { } } public CallRecord(Date startTime, Date endTime, String callingAddressAreaCode, String answerAddressAreaCode) { super(); this.startTime = startTime; this.endTime = endTime; this.callingAddressAreaCode = callingAddressAreaCode; this.answerAddressAreaCode = answerAddressAreaCode; } public Date getStartTime() { return startTime; } public void setStartTime(Date startTime) { this.startTime = startTime; } public Date getEndTime() { return endTime; } public void setEndTime(Date endTime) { this.endTime = endTime; } public String getCallingAddressAreaCode() { return callingAddressAreaCode; } public void setCallingAddressAreaCode(String callingAddressAreaCode) { this.callingAddressAreaCode = callingAddressAreaCode; } public String getAnswerAddressAreaCode() { return answerAddressAreaCode; } public void setAnswerAddressAreaCode(String answerAddressAreaCode) { this.answerAddressAreaCode = answerAddressAreaCode; } } abstract class CallChargeRule extends ChargeRule { } class LandPhoneInCityRule extends CallChargeRule { @Override public double calCost(UserRecords userRecords) { double sumCost = 0; for (CallRecord call : userRecords.getCallingInCityRecords()) { double distanceS = (-call.getStartTime().getTime() + call.getEndTime().getTime()) / 1000; if (distanceS < 0) { continue; } double distanceM = (int) distanceS / 60; if (distanceS % 60 != 0) { distanceM += 1; } if (call.getCallType().equals("11")) { sumCost += distanceM * 0.1; } else if (call.getCallType().equals("12")) { sumCost += distanceM * 0.3; } else if (call.getCallType().equals("13")) { sumCost += distanceM * 0.6; } } return sumCost; } } class LandPhoneInlandRule extends CallChargeRule { @Override public double calCost(UserRecords userRecords) { double sumCost = 0; for (CallRecord call : userRecords.getCallingInLandRecords()) { double distanceS = (-call.getStartTime().getTime() + call.getEndTime().getTime()) / 1000; if (distanceS < 0) { continue; } double distanceM = (int) distanceS / 60; if (distanceS % 60 != 0) { distanceM += 1; } sumCost += distanceM * 0.6; } return sumCost; } } class LandPhoneInProvinceRule extends CallChargeRule { @Override public double calCost(UserRecords userRecords) { double sumCost = 0; for (CallRecord call : userRecords.getCallingInProvinceRecords()) { double distanceS = (-call.getStartTime().getTime() + call.getEndTime().getTime()) / 1000; if (distanceS < 0) { continue; } double distanceM = (int) distanceS / 60; if (distanceS % 60 != 0) { distanceM += 1; } sumCost += distanceM * 0.3; } return sumCost; } } class MobilePhoneInCityRule extends CallChargeRule { @Override public double calCost(UserRecords userRecords) { double sumCost = 0; for (CallRecord call : userRecords.getCallingInCityRecords()) { double distanceS = (-call.getStartTime().getTime() + call.getEndTime().getTime()) / 1000; if (distanceS < 0) { continue; } double distanceM = (int) distanceS / 60; if (distanceS % 60 != 0) { distanceM += 1; } if (call.getCallType().equals("11")) { sumCost += distanceM * 0.1; } else if (call.getCallType().equals("12")) { sumCost += distanceM * 0.2; } else if (call.getCallType().equals("13")) { sumCost += distanceM * 0.2; } } return sumCost; } } class MobilePhoneInlandRule extends CallChargeRule { @Override public double calCost(UserRecords userRecords) { double sumCost = 0; for (CallRecord call : userRecords.getCallingInLandRecords()) { double distanceS = (-call.getStartTime().getTime() + call.getEndTime().getTime()) / 1000; if (distanceS < 0) { continue; } double distanceM = (int) distanceS / 60; if (distanceS % 60 != 0) { distanceM += 1; } sumCost += distanceM * 0.6; } for (CallRecord call : userRecords.getAnswerInLandRecords()) { double distanceS = (-call.getStartTime().getTime() + call.getEndTime().getTime()) / 1000; if (distanceS < 0) { continue; } double distanceM = (int) distanceS / 60; if (distanceS % 60 != 0) { distanceM += 1; } sumCost += distanceM * 0.3; } return sumCost; } } class MobilePhoneInProvinceRule extends CallChargeRule { @Override public double calCost(UserRecords userRecords) { double sumCost = 0; for (CallRecord call : userRecords.getCallingInProvinceRecords()) { double distanceS = (-call.getStartTime().getTime() + call.getEndTime().getTime()) / 1000; if (distanceS < 0) { continue; } double distanceM = (int) distanceS / 60; if (distanceS % 60 != 0) { distanceM += 1; } if (call.getCallType().equals("21")) { sumCost += distanceM * 0.3; } else if (call.getCallType().equals("22")) { sumCost += distanceM * 0.3; } else if (call.getCallType().equals("23")) { sumCost += distanceM * 0.3; } } return sumCost; } } class User { private UserRecords userRecords = new UserRecords(); private double balance = 100; private ChargeMode chargeMode; private String number; public double calCost() { return chargeMode.calCost(userRecords); } public double calBalance() { return balance - chargeMode.getMonthlyRent() - chargeMode.calCost(userRecords); } public UserRecords getUserRecords() { return userRecords; } public void setUserRecords(UserRecords userRecords) { this.userRecords = userRecords; } public ChargeMode getChargeMode() { return chargeMode; } public void setChargeMode(ChargeMode chargeMode) { this.chargeMode = chargeMode; } public String getNumber() { return number; } public void setNumber(String number) { this.number = number; } } class Outputtool { @SuppressWarnings("deprecation") public void output(double out) { BigDecimal numb = new BigDecimal(out); out = numb.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue(); System.out.print(out); } }View Code
心得:本次题目是上一道题的延续,增加了手机计费,需要判断的情况变多了,不仅有手机与手机之间的通信,还有手机与座机之间的通信,需要考虑的方面变多了,在写这道题目的时候,因为考虑的没有那么到位,写的有点困难。
2)7-2 sdut-Collection-sort--C~K的班级(II)
经过不懈的努力,C~K终于当上了班主任。
现在他要统计班里学生的名单,但是C~K在教务系统中导出班级名单时出了问题,发现会有同学的信息重复,现在他想把重复的同学信息删掉,只保留一个,
但是工作量太大了,所以找到了会编程的你,你能帮他解决这个问题吗?
输入格式:
第一行输入一个N,代表C~K导出的名单共有N行(N<100000).
接下来的N行,每一行包括一个同学的信息,学号 姓名 年龄 性别。
输出格式:
第一行输出一个n,代表删除重复名字后C~K的班级共有几人。
接下来的n行,输出每一个同学的信息,输出按照学号从小到大的顺序。
源码如下:
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
import java.util.ArrayList; import java.util.Comparator; import java.util.Scanner; public class Main { public static void main(String[] args){ Scanner input =new Scanner(System.in); int n=Integer.parseInt(input.nextLine());//第一行输入的n ArrayList<String> p=new ArrayList<String>(); for(int i=0;i<n;i++) { String s=input.nextLine(); if(!p.contains(s))//防止重复添加 p.add(s); } p.sort(new Comparator<String>() { @Override public int compare(String o1, String o2) { return Integer.parseInt(o1.substring(0,4))-Integer.parseInt(o2.substring(0,4)); }//返回值>=0时,o1、o2不交换位置,<0时交换位置。注意o1是下标较大的那个元素,如果要实现降序,可调换o1、o2 }); System.out.println(p.size()); for(String a:p){ System.out.println(a); } } }View Code
心得:本题难度不大,主要是考查对于list的函数是否熟悉。
3)7-3 阅读程序,按照题目需求修改程序
功能需求:
使用集合存储3个员工的信息(有序);
通过迭代器依次找出所有的员工。
提示:学生复制以下代码到编程区,并按需求进行调试修改。
// 1、导入相关包
//定义员工类
class Employee {
private String name;
private int age;
public Employee() {
super();
}
public Employee(String name, int age) {
super();
this.name = name;
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
//主函数
public class Main {
public static void main(String[] args) {
// 1、创建有序集合对象
Collection c ;
// 创建3个员工元素对象
for (int i = 0; i < 3; i++) {
Scanner sc = new Scanner(System.in);
String employeeName = sc.nextLine();
int employeeAge = sc.nextInt();
Employee employee = new Employee(employeeName, employeeAge);
c.add(employee);
}
// 2、创建迭代器遍历集合
Iterator it;
//3、遍历
while (it.hasnext) {
//4、集合中对象未知,向下转型
Employee e = it.next();
System.out.println(e.getName() + "---" + e.getAge());
}
}
}
输入样例:
在这里给出一组输入。例如:
zs
10
ls
20
ww
30
输出样例:
在这里给出相应的输出。例如:
zs---10 ls---20 ww---30
源码如下:
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
//1、导入相关包 import java.util.ArrayList; import java.util.Scanner; import java.util.Collection; import java.util.Iterator; //定义员工类 class Employee { private String name; private int age; public Employee() { super(); } public Employee(String name, int age) { super(); this.name = name; this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } } //主函数 public class Main { public static void main(String[] args) { // 1、创建有序集合对象 ArrayList<Employee> c = new ArrayList<Employee>(); Scanner sc = new Scanner(System.in); // 创建3个员工元素对象 for (int i = 0; i < 3; i++) { String employeeName = sc.next(); int employeeAge = sc.nextInt(); Employee employee = new Employee(employeeName, employeeAge); c.add(employee); } // 2、创建迭代器遍历集合 Iterator<Employee> it=c.iterator(); //3、遍历 while (it.hasNext()) { //4、集合中对象未知,向下转型 Employee e = (Employee)it.next(); System.out.println(e.getName() + "---" + e.getAge()); } } }View Code
心得:本题主要考查集合框架Collection中函数的关系以及功能,所以也不是特别困难。
3、pta题目集8
1)7-1 电信计费系列3-短信计费
实现一个简单的电信计费程序,针对手机的短信采用如下计费方式:
1、接收短信免费,发送短信0.1元/条,超过3条0.2元/条,超过5条0.3元/条。
2、如果一次发送短信的字符数量超过10个,按每10个字符一条短信进行计算。
输入:
输入信息包括两种类型
1、逐行输入南昌市手机用户开户的信息,每行一个用户。
格式:u-号码 计费类型 (计费类型包括:0-座机 1-手机实时计费 2-手机A套餐 3-手机短信计费)
例如:u-13305862264 3
座机号码由区号和电话号码拼接而成,电话号码包含7-8位数字,区号最高位是0。
手机号码由11位数字构成,最高位是1。
本题只针对类型3-手机短信计费。
2、逐行输入本月某些用户的短信信息,短信的格式:
m-主叫号码,接收号码,短信内容 (短信内容只能由数字、字母、空格、英文逗号、英文句号组成)
m-18907910010 13305862264 welcome to jiangxi.
m-13305862264 18907910010 thank you.
注意:以上两类信息,先输入所有开户信息,再输入所有通讯信息,最后一行以“end”结束。
输出:
根据输入的详细短信信息,计算所有已开户的用户的当月短信费用(精确到小数点后2位,单位元)。假设每个用户初始余额是100元。
每条短信信息均单独计费后累加,不是将所有信息累计后统一计费。
格式:号码+英文空格符+总的话费+英文空格符+余额
每个用户一行,用户之间按号码字符从小到大排序。
错误处理:
输入数据中出现的不符合格式要求的行一律忽略。
本题只做格式的错误判断,无需做内容上不合理的判断,比如同一个电话两条通讯记录的时间有重合、开户号码非南昌市的号码、自己给自己打电话等,此类情况都当成正确的输入计算。但时间的输入必须符合要求,比如不能输入2022.13.61 28:72:65。
类图:
源码如下:
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
import java.util.ArrayList; import java.util.Comparator; import java.util.Scanner; import java.math.BigDecimal; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Locale; import java.text.ParseException; public class Main { public static void main(String[] args) { Outputtool outputtool = new Outputtool(); Inputdeal inputdeal = new Inputdeal(); ArrayList<User> users = new ArrayList<>(); Scanner in = new Scanner(System.in); String input = in.nextLine(); while (!input.equals("end")) { if (1 == inputdeal.check(input)) { inputdeal.writeUser(users, input); } else if (2 == inputdeal.check(input)) { inputdeal.writeRecord(users, input); } input = in.nextLine(); } users.sort(new Comparator<User>() { @Override public int compare(User u1, User u2) { if (u1.getNumber().charAt(0) == '0' && u2.getNumber().charAt(0) != '0') { return -1; } else if (u1.getNumber().charAt(0) != '0' && u2.getNumber().charAt(0) == '0') { return 1; } if (Double.parseDouble(u1.getNumber()) > Double.parseDouble(u2.getNumber())) { return 1; } else { return -1; } } }); for (User u : users) { System.out.print(u.getNumber() + " "); outputtool.output(u.calCost()); System.out.print(" "); outputtool.output(u.calBalance()); System.out.println(); } } } abstract class ChargeMode { protected ArrayList<ChargeRule> chargeRules = new ArrayList<>(); public abstract double calCost(UserRecords userRecords); public abstract double getMonthlyRent(); public ArrayList<ChargeRule> getChargeRules() { return chargeRules; } public void setChargeRules(ArrayList<ChargeRule> chargeRules) { this.chargeRules = chargeRules; } } class UserRecords { private ArrayList<CallRecord> callingInCityRecords = new ArrayList<CallRecord>(); private ArrayList<CallRecord> callingInProvinceRecords = new ArrayList<CallRecord>(); private ArrayList<CallRecord> callingInLandRecords = new ArrayList<CallRecord>(); private ArrayList<CallRecord> answerInCityRecords = new ArrayList<CallRecord>(); private ArrayList<CallRecord> answerInProvinceRecords = new ArrayList<CallRecord>(); private ArrayList<CallRecord> answerInLandRecords = new ArrayList<CallRecord>(); private ArrayList<MessageRecord> sendMessageRecords = new ArrayList<MessageRecord>(); private ArrayList<MessageRecord> receiveMessageRecords = new ArrayList<MessageRecord>(); public void addCallingInCityRecords(CallRecord callRecord) { callingInCityRecords.add(callRecord); } public void addCallingInProvinceRecords(CallRecord callRecord) { callingInProvinceRecords.add(callRecord); } public void addCallingInLandRecords(CallRecord callRecord) { callingInLandRecords.add(callRecord); } public void addAnswerInCityRecords(CallRecord callRecord) { answerInCityRecords.add(callRecord); } public void aaddAnswerInProvinceRecords(CallRecord callRecord) { answerInProvinceRecords.add(callRecord); } public void addAnswerInLandRecords(CallRecord callRecord) { answerInLandRecords.add(callRecord); } public void addSendMessageRecords(MessageRecord callRecord) { sendMessageRecords.add(callRecord); } public void addReceiveMessageRecords(MessageRecord callRecord) { receiveMessageRecords.add(callRecord); } public ArrayList<CallRecord> getCallingInCityRecords() { return callingInCityRecords; } public void setCallingInCityRecords(ArrayList<CallRecord> callingInCityRecords) { this.callingInCityRecords = callingInCityRecords; } public ArrayList<CallRecord> getCallingInProvinceRecords() { return callingInProvinceRecords; } public void setCallingInProvinceRecords(ArrayList<CallRecord> callingInProvinceRecords) { this.callingInProvinceRecords = callingInProvinceRecords; } public ArrayList<CallRecord> getCallingInLandRecords() { return callingInLandRecords; } public void setCallingInLandRecords(ArrayList<CallRecord> callingInLandRecords) { this.callingInLandRecords = callingInLandRecords; } public ArrayList<CallRecord> getAnswerInCityRecords() { return answerInCityRecords; } public void setAnswerInCityRecords(ArrayList<CallRecord> answerInCityRecords) { this.answerInCityRecords = answerInCityRecords; } public ArrayList<CallRecord> getAnswerInProvinceRecords() { return answerInProvinceRecords; } public void setAnswerInProvinceRecords(ArrayList<CallRecord> answerInProvinceRecords) { this.answerInProvinceRecords = answerInProvinceRecords; } public ArrayList<CallRecord> getAnswerInLandRecords() { return answerInLandRecords; } public void setAnswerInLandRecords(ArrayList<CallRecord> answerInLandRecords) { this.answerInLandRecords = answerInLandRecords; } public ArrayList<MessageRecord> getSendMessageRecords() { return sendMessageRecords; } public void setSendMessageRecords(ArrayList<MessageRecord> sendMessageRecords) { this.sendMessageRecords = sendMessageRecords; } public ArrayList<MessageRecord> getReceiveMessageRecords() { return receiveMessageRecords; } public void setReceiveMessageRecords(ArrayList<MessageRecord> receiveMessageRecords) { this.receiveMessageRecords = receiveMessageRecords; } } class MobilePhoneMassageCharging extends ChargeMode { private double monthlyRent = 0; public MobilePhoneMassageCharging() { super(); chargeRules.add(new MobilePhoneMessageRule()); } @Override public double calCost(UserRecords userRecords) { double sumCost = 0; for (ChargeRule rule : chargeRules) { sumCost += rule.calCost(userRecords); } return sumCost; } @Override public double getMonthlyRent() { return monthlyRent; } } class Inputdeal { public int check(String input) { if (input.matches("[u]-0791[0-9]{7,8}\\s[0]") || input.matches("[u]-1[0-9]{10}\\s[13]")) { return 1; } else if (input.matches("[m]-1[0-9]{10}\\s" + "1[0-9]{10}\\s" + "[0-9a-zA-Z\\s\\.,]+")) { return 2; } return 0; } public void writeUser(ArrayList<User> users, String input) { User usernew = new User(); String[] inputs = input.split(" "); String num = inputs[0].substring(2); for (User i : users) { if (i.getNumber().equals(num)) { return; } } usernew.setNumber(num); int mode = Integer.parseInt(inputs[1]); if (mode == 3) { usernew.setChargeMode(new MobilePhoneMassageCharging()); } users.add(usernew); } public void writeRecord(ArrayList<User> users, String input) { String[] inputs = input.split(" "); inputs[0] = inputs[0].substring(2); User callu = null, answeru = null; String out = inputs[0]; String in = ""; if (inputs.length == 6) { in = inputs[1]; } else if (inputs.length == 7) { in = inputs[1]; } else if (inputs.length == 8) { in = inputs[2]; } else { in = inputs[1]; } for (User i : users) { if (i.getNumber().equals(out)) { callu = i; } if (i.getNumber().equals(in)) { answeru = i; } if (callu != null && answeru != null) { break; } } if (input.charAt(0) == 'm') { MessageRecord messageRecord = new MessageRecord(input); if (callu != null) { callu.getUserRecords().addSendMessageRecords(messageRecord); ; } if (answeru != null) { callu.getUserRecords().addReceiveMessageRecords(messageRecord); } } } } abstract class CommunicationRecord { protected String callingNumber; protected String answerNumbe; public String getCallingNumber() { return callingNumber; } public void setCallingNumber(String callingNumber) { this.callingNumber = callingNumber; } public String getAnswerNumbe() { return answerNumbe; } public void setAnswerNumbe(String answerNumbe) { this.answerNumbe = answerNumbe; } } abstract class ChargeRule { abstract public double calCost(UserRecords userRecords); } class CallRecord extends CommunicationRecord { private Date startTime; private Date endTime; private String callingAddressAreaCode; private String answerAddressAreaCode; public String getCallType() { String type = ""; if (callingAddressAreaCode.equals("0791")) { type = type.concat("1"); } else if (callingAddressAreaCode.matches("^079[023456789]$") || callingAddressAreaCode.equals("0701")) { type = type.concat("2"); } else { type = type.concat("3"); } if (answerAddressAreaCode.equals("0791")) { type = type.concat("1"); } else if (answerAddressAreaCode.matches("^079[023456789]$") || answerAddressAreaCode.equals("0701")) { type = type.concat("2"); } else { type = type.concat("3"); } return type; } public CallRecord(String[] inputs) { super(); char type = inputs[0].charAt(0); String sd = null, st = null, ed = null, et = null; if (type == 't') { if (inputs.length == 6) { sd = inputs[2]; st = inputs[3]; ed = inputs[4]; et = inputs[5]; callingAddressAreaCode = inputs[0].substring(0, 4); answerAddressAreaCode = inputs[1].substring(0, 4); } else if (inputs.length == 7) { sd = inputs[3]; st = inputs[4]; ed = inputs[5]; et = inputs[6]; if (inputs[0].charAt(0) != '0') { if (inputs[2].length() == 10) { answerAddressAreaCode = inputs[2].substring(0, 3); } else { answerAddressAreaCode = inputs[2].substring(0, 4); } callingAddressAreaCode = inputs[1]; } else { if (inputs[0].length() == 10) { callingAddressAreaCode = inputs[0].substring(0, 3); } else { callingAddressAreaCode = inputs[0].substring(0, 4); } answerAddressAreaCode = inputs[2]; } } else if (inputs.length == 8) { sd = inputs[4]; st = inputs[5]; ed = inputs[6]; et = inputs[7]; callingAddressAreaCode = inputs[1]; answerAddressAreaCode = inputs[3]; } } else if (type == 'm') { } SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy.MM.dd HH:mm:ss", Locale.getDefault()); try { startTime = simpleDateFormat.parse(sd + " " + st); endTime = simpleDateFormat.parse(ed + " " + et); } catch (ParseException e) { } } public CallRecord(Date startTime, Date endTime, String callingAddressAreaCode, String answerAddressAreaCode) { super(); this.startTime = startTime; this.endTime = endTime; this.callingAddressAreaCode = callingAddressAreaCode; this.answerAddressAreaCode = answerAddressAreaCode; } public Date getStartTime() { return startTime; } public void setStartTime(Date startTime) { this.startTime = startTime; } public Date getEndTime() { return endTime; } public void setEndTime(Date endTime) { this.endTime = endTime; } public String getCallingAddressAreaCode() { return callingAddressAreaCode; } public void setCallingAddressAreaCode(String callingAddressAreaCode) { this.callingAddressAreaCode = callingAddressAreaCode; } public String getAnswerAddressAreaCode() { return answerAddressAreaCode; } public void setAnswerAddressAreaCode(String answerAddressAreaCode) { this.answerAddressAreaCode = answerAddressAreaCode; } } class MessageRecord extends CommunicationRecord { private String message; public MessageRecord(String input) { super(); this.message = input.substring(26); } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } } abstract class CallChargeRule extends ChargeRule { } class MobilePhoneMessageRule extends CallChargeRule{ @Override public double calCost(UserRecords userRecords) { double sum=0; int number=0; for(MessageRecord m: userRecords.getSendMessageRecords()){ int length=m.getMessage().length(); if(length<=10){ number++; }else{ number+=length/10; if(length%10!=0){ number++; } } } if(number<=3){ sum=number*0.1; }else if (number<=5) { sum=0.3+0.2*(number-3); }else { sum=0.7+0.3*(number-5); } return sum; } } class User { private UserRecords userRecords = new UserRecords(); private double balance = 100; private ChargeMode chargeMode; private String number; public double calCost() { return chargeMode.calCost(userRecords); } public double calBalance() { return balance - chargeMode.getMonthlyRent() - chargeMode.calCost(userRecords); } public UserRecords getUserRecords() { return userRecords; } public void setUserRecords(UserRecords userRecords) { this.userRecords = userRecords; } public ChargeMode getChargeMode() { return chargeMode; } public void setChargeMode(ChargeMode chargeMode) { this.chargeMode = chargeMode; } public String getNumber() { return number; } public void setNumber(String number) { this.number = number; } } class Outputtool { @SuppressWarnings("deprecation") public void output(double out) { BigDecimal numb = new BigDecimal(out); out = numb.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue(); System.out.print(out); } }View Code
心得:本次题目主要是短信计费,相对于前面两次的题目来说就简单了许多,只要正确的添加上关于短信的函数,在判断短信的输入格式时
,主要考虑全面就差不多了,主要因为有前面两次的题目做基础,这次就没有很难。
2)7-2 编写一个类Shop(商店)、内部类InnerCoupons(内部购物券)
编写一个类Shop
(商店),该类中有一个成员内部类InnerCoupons
(内部购物券),可以用于购买该商店的牛奶(假设每箱牛奶售价为50元)。要求如下:
(1)Shop类中有私有属性milkCount
(牛奶的箱数,int类型)、公有的成员方法setMilkCount( )
和getMilkCount( )
分别用于设置和获取牛奶的箱数。
(2)成员内部类InnerCoupons,有公有属性value
(面值,int类型),一个带参数的构造方法可以设定购物券的面值value,一个公有的成员方法buy( )
要求输出使用了面值为多少的购物券进行支付,同时使商店牛奶的箱数减少value/50。
(3)Shop类中还有成员变量coupons50
(面值为50元的内部购物券,类型为InnerCoupons)、coupons100
(面值为100元的内部购物券,类型为InnerCoupons)。
(4)在Shop类的构造方法中,调用内部类InnerCoupons的带参数的构造方法分别创建上面的购物券coupons50、coupons100。
在测试类Main
中,创建一个Shop类的对象myshop,从键盘输入一个整数(大于或等于3),将其设置为牛奶的箱数。假定有顾客分别使用了该商店面值为50的购物券、面值为100的购物券各消费一次,分别输出消费后商店剩下的牛奶箱数。
输入格式:
输入一个大于或等于3的整数。
输出格式:
使用了面值为50的购物券进行支付
牛奶还剩XX箱
使用了面值为100的购物券进行支付
牛奶还剩XX箱
源码如下:
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
import java.util.Scanner; public class Main { public static void main(String[] args){ Scanner s=new Scanner(System.in); int a=s.nextInt(); Shop myshop=new Shop(); myshop.setMilkCount(a); myshop.coupons50.buy(); System.out.println("牛奶还剩"+myshop.getMilkCount()+"箱"); myshop.coupons100.buy(); System.out.println("牛奶还剩"+myshop.getMilkCount()+"箱"); } } class Shop{ private int milkCount; InnerCoupons coupons50=new InnerCoupons(50); InnerCoupons coupons100=new InnerCoupons(100); public Shop(){ } public int getMilkCount() { return milkCount; } public void setMilkCount(int milkCount) { this.milkCount = milkCount; } class InnerCoupons{ public int value; public InnerCoupons(int value){ this.value=value; } public void buy(){ milkCount=milkCount-value/50; System.out.println("使用了面值为"+value+"的购物券进行支付"); } } }View Code
心得:这个题目的难度不大,根据题目意思编写就好。
3)7-3 动物发声模拟器(多态)
设计一个动物发生模拟器,用于模拟不同动物的叫声。比如狮吼、虎啸、狗旺旺、猫喵喵……。
定义抽象类Animal,包含两个抽象方法:获取动物类别getAnimalClass()、动物叫shout();
然后基于抽象类Animal定义狗类Dog、猫类Cat和山羊Goat,用getAnimalClass()方法返回不同的动物类别(比如猫,狗,山羊),用shout()方法分别输出不同的叫声(比如喵喵、汪汪、咩咩)。
最后编写AnimalShoutTest类测试,输出:
猫的叫声:喵喵
狗的叫声:汪汪
山羊的叫声:咩咩
其中,在AnimalShoutTestMain类中,用speak(Animal animal){}方法输出动物animal的叫声,在main()方法中调用speak()方法,分别输出猫、狗和山羊对象的叫声。
请在下面的【】处添加代码。
//动物发生模拟器. 请在下面的【】处添加代码。
public class AnimalShoutTest2 {
public static void main(String[] args) {
Cat cat = new Cat();
Dog dog = new Dog();
Goat goat = new Goat();
speak(cat);
speak(dog);
speak(goat);
}
//定义静态方法speak()
【】
}
//定义抽象类Animal
【】class Animal{
【】
}
//基于Animal类,定义猫类Cat,并重写两个抽象方法
class Cat 【】{
【】
【】
}
//基于Animal类,定义狗类Dog,并重写两个抽象方法
class Dog 【】{
【】
【】
}
//基于Animal类,定义山羊类Goat,并重写两个抽象方法
class Goat 【】{
【】
【】
}
源码如下:
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
//动物发生模拟器. 请在下面的【】处添加代码。 public class Main { public static void main(String[] args) { Cat cat = new Cat(); Dog dog = new Dog(); Goat goat = new Goat(); speak(cat); speak(dog); speak(goat); } //定义静态方法speak() public static void speak(Animal animal){ System.out.println(animal.getAimalClass()+"的叫声:"+animal.shout()); } } //定义抽象类Animal abstract class Animal{ abstract public String getAimalClass(); abstract public String shout(); } //基于Animal类,定义猫类Cat,并重写两个抽象方法 class Cat extends Animal{ @Override public String getAimalClass() { return "猫"; } @Override public String shout() { return "喵喵"; } } //基于Animal类,定义狗类Dog,并重写两个抽象方法 class Dog extends Animal{ @Override public String getAimalClass() { return "狗"; } @Override public String shout() { return "汪汪"; } } //基于Animal类,定义山羊类Goat,并重写两个抽象方法 class Goat extends Animal{ @Override public String getAimalClass() { return "山羊"; } @Override public String shout() { return "咩咩"; } }View Code
心得:本题也是对于多态的理解,难度不大。
三、总结
这3次题目集主要是关于电信计费,考查的方向大致是继承、多态、集合。通过这些题目的练习,对于继承、多态、集合有了一定的认识,但是在写的时候还是有困难,所以还有很多需要学习。这次的题目还巩固了正则表达式的使用,本人还有许多的知识点不熟悉,之后会更加努力的学习。
标签:inputs,return,String,ArrayList,BLOG,void,public From: https://www.cnblogs.com/jiang-jq12/p/16948713.html