前言：
题目集 1~3 的知识点、题量、难度等情况如下：
-
知识点：JAVA基础，基础算法，面向对象程序设计
-
题量：共计 2 道题目
-
难度：题目从易到难，逐层递进，分别为考察Java各个类的理解、掌握与运用。
设计与分析：
1 import java.text.ParseException;
2 import java.time.DateTimeException;
3 import java.time.Duration;
4 import java.time.LocalDateTime;
5 import java.util.ArrayList;
6 import java.util.Scanner;
7
8 public class Main {
9 public static boolean isNumeric(String string) {
10 int intValue;
11 try {
12 intValue = Integer.parseInt(string);
13 return true;
14 } catch (NumberFormatException e) {
15 return false;
16 }
17 }
18
19 public static void main(String[] args) throws ParseException {
20 Menu menu = new Menu();
21 ArrayList<Table> tables = new ArrayList<Table>();
22 Scanner input = new Scanner(System.in);
23 String str = new String();
24 int i = 0;
25 int portion = 0, quota = 0;
26 while (true) {// 输入菜单
27 Dish tem = new Dish();
28 int repeat = -1;
29 str = input.nextLine();
30 if (str.matches("[\\S]* [1-9][\\d]*")) {
31 String[] take = str.split(" ");
32 tem.name = take[0];
33 tem.unit_price = Integer.parseInt(take[1]);
34 if (tem.unit_price > 300) {
35 System.out.println(tem.name + " price out of range " + tem.unit_price);
36 continue;
37 }
38 tem.isT = false;
39 repeat = menu.searchDish(tem.name);
40 if (repeat != -1) {
41 menu.dishs.remove(repeat);
42 }
43 menu.dishs.add(tem);
44 } else if (str.matches("[\\S]* [\\d]* T")) {
45 String[] take = str.split(" ");
46 tem.name = take[0];
47 tem.unit_price = Integer.parseInt(take[1]);
48 if (tem.unit_price > 300) {
49 System.out.println(tem.name + " price out of range " + tem.unit_price);
50 continue;
51 }
52 tem.isT = true;
53 if (repeat != -1) {
54 menu.dishs.remove(repeat);
55 }
56 menu.dishs.add(tem);
57 } else if (str.equals("end")) {
58 break;
59 } else if (str.matches("tab.*")) {
60 break;
61
62 } else {
63 System.out.println("wrong format");
64 continue;
65 }
66 }
67 while (!str.equals("end")) {
68 Table tem = new Table();
69 boolean repeat = false;
70 int repeatNum = 0;
71 if(str.matches(".*t.*a.*")) {
72 if (str.matches("table [1-9][\\d]* [\\d]*/[\\d][\\d]?/[\\d][\\d]? [\\d][\\d]?/[\\d][\\d]?/[\\d][\\d]?")) {
73 String[] take = str.split(" ");
74 String[] Date = take[2].split("/");
75 String[] Time = take[3].split("/");
76 int[] intDate = new int[3];
77 int[] intTime = new int[3];
78 for (i = 0; i < 3; i++) {
79 intDate[i] = Integer.parseInt(Date[i]);
80 intTime[i] = Integer.parseInt(Time[i]);
81 }
82 tem.num = Integer.parseInt(take[1]);
83 if (tem.num > 55) {
84 System.out.println(tem.num + " table num out of range");
85 str = input.nextLine();
86 continue;
87
88 }
89 try {
90 tem.time = LocalDateTime.of(intDate[0], intDate[1], intDate[2], intTime[0], intTime[1],
91 intTime[2]);
92 tem.getWeekDay();
93 } catch (DateTimeException e) {
94 System.out.println(tem.num + " date error");
95 str = input.nextLine();
96 continue;
97 }
98 if (!tem.isOpen()) {
99 System.out.println("table " + tem.num + " out of opening hours");
100 str = input.nextLine();
101 continue;
102 }
103 if (!(tem.time.isAfter(LocalDateTime.of(2022, 1, 1, 0, 0, 0))
104 && tem.time.isBefore(LocalDateTime.of(2024, 1, 1, 0, 0, 0)))) {
105 System.out.println("not a valid time period");
106 str = input.nextLine();
107 continue;
108 }
109 // 判断桌号是否重复
110 if (tem.isOpen()) {
111 for (i = 0; i < tables.size(); i++) {
112 // 有重复的桌号
113 if (tem.num == tables.get(i).num && tables.get(i).isOpen()) {
114 Duration duration = Duration.between(tem.time, tables.get(i).time);
115 // 同一天
116 if (duration.toDays() == 0) {
117 // 在周一到周五
118 if (tem.weekday > 0 && tem.weekday < 6) {
119 // 在同一时间段
120 if (tem.time.getHour() < 15 && tables.get(i).time.getHour() < 15) {
121 repeat = true;
122 repeatNum = i;
123 break;
124 }
125 }
126 // 在周末
127 else {
128 // 时间相差小于一小时
129 if (duration.toHours() < 3600) {
130 repeatNum = i;
131 repeat = true;
132 break;
133 }
134 }
135 }
136 }
137 }
138 }
139 System.out.println("table " + tem.num + ": ");
140
141 } else {
142 System.out.println("wrong format");
143 str = input.nextLine();
144 continue;
145 }
146 // 本桌开始点菜
147 while (true) {
148 str = input.nextLine();
149 if (str.matches("[1-9][\\d]* [\\S]* [\\d] [1-9][\\d]*")) {
150 String[] take = str.split(" ");
151 portion = Integer.parseInt(take[2]);
152 quota = Integer.parseInt(take[3]);
153 if (tem.order.records.size() > 0) {
154 if (Integer
155 .parseInt(take[0]) <= tem.order.records.get(tem.order.records.size() - 1).orderNum) {
156 System.out.println("record serial number sequence error");
157 continue;
158 }
159 }
160 if (menu.searchDish(take[1]) == -1) {
161 System.out.println(take[1] + " does not exist");
162 continue;
163 }
164 if (portion > 3 || portion < 1) {
165 System.out.println(Integer.parseInt(take[0]) + " portion out of range " + portion);
166 continue;
167 }
168 if (quota > 15) {
169 System.out.println(Integer.parseInt(take[0]) + " num out of range " + quota);
170 continue;
171 }
172 tem.od(menu, take[0], take[1], portion, quota);
173 }
174 // 判断是否为删除订单
175 else if (str.matches("[1-9][\\d]* delete")) {
176 String[] take = str.split(" ");
177 tem.order.delARecordByOrderNum(Integer.parseInt(take[0]));
178 }
179 // 判断是否为夹杂菜单
180 else if (str.matches("[\\S]* [\\d]*")) {
181 System.out.println("invalid dish");
182 continue;
183 } else if (str.matches("[\\S]* [\\d]* T")) {
184 System.out.println("invalid dish");
185 continue;
186 }
187 // 判断是否为代点
188 else if (str.matches("[\\d]* [\\d]* [\\S]* [\\d] [1-9][\\d]*")) {
189 String[] take = str.split(" ");
190 // 判断代点桌号是否存在
191 boolean exist = false;
192 for (int j = 0; j < tables.size(); j++) {
193 if (tables.get(j).num == Integer.parseInt(take[0])) {
194 exist = true;
195 break;
196 }
197 }
198 if (exist) {
199 System.out.print(Integer.parseInt(take[1]) + " table " + tem.num + " pay for table "
200 + Integer.parseInt(take[0]) + " ");
201 Record treat = new Record();
202 treat.d = menu.dishs.get(menu.searchDish(take[2]));
203 portion = Integer.parseInt(take[3]);
204 quota = Integer.parseInt(take[4]);
205 treat.portion = portion;
206 treat.quota = quota;
207 System.out.print(treat.getPrice() + "\n");
208 tem.order.records.add( treat);
209 }
210 // 若不存在则输出内容
211 else {
212 System.out.println("Table number ：" + Integer.parseInt(take[0]) + " does not exist");
213 }
214
215 } else if (str.equals("end")) {
216 break;
217 } else if (str.matches("table.*")) {
218 break;
219 } else {
220 System.out.println("wrong format");
221 continue;
222 }
223 }
224 // 本桌点菜结束，进入下一桌
225 if (repeat) {
226 for (i = 0; i < tables.get(repeatNum).order.records.size(); i++) {
227 for (int j = 0; j < tem.order.records.size(); j++) {
228 if (tables.get(repeatNum).order.records.get(i).d.name == tem.order.records.get(j).d.name) {
229 if (tables.get(repeatNum).order.records.get(i).portion == tem.order.records
230 .get(j).portion) {
231 tables.get(repeatNum).order.records.get(i).quota += tem.order.records.get(j).quota;
232 tem.order.records.remove(j);
233 }
234 }
235 }
236
237 }
238 tables.get(repeatNum).order.records.addAll(tem.order.records);
239 continue;
240 }
241 tables.add(tem);
242 }
243 else {
244 str = input.nextLine();
245 }
246 }
247
248
249
250 // 最终输出桌号订单信息
251 for (i = 0; i < tables.size(); i++) {
252 if (tables.get(i).isOpen()) {
253 tables.get(i).getSum();
254 System.out
255 .println("table " + tables.get(i).num + ": " + tables.get(i).origSum + " " + tables.get(i).sum);
256 }
257
258 }
259 }
260
261 static class Dish {
262 String name;
263 int unit_price;
264 boolean isT = false;
265 }
266
267 static class Record {
268 int orderNum;
269 Dish d;
270 int portion;
271 int quota;
272 boolean isDeleted = false;
273
274 int getPrice() {
275 if (portion == 2)
276 return (int) Math.round(1.5 * d.unit_price) * quota;
277 else if (portion == 3)
278 return 2 * d.unit_price * quota;
279 else
280 return d.unit_price * quota;
281 }
282 }
283
284 static class Menu {
285 ArrayList<Dish> dishs = new ArrayList<Dish>();
286
287 int searchDish(String dishName) {
288 for (int i = 0; i < dishs.size(); i++) {
289 if (dishName.equals(dishs.get(i).name)) {
290 return i;
291 }
292 }
293 return -1;
294 }
295
296 Dish addDish(String dishName, int unit_price) {
297 Dish newDish = new Dish();
298 newDish.name = dishName;
299 newDish.unit_price = unit_price;
300 return newDish;
301 }
302 }
303
304 static class Order {
305 // Record[] records = new Record[20];
306 ArrayList<Record> records = new ArrayList<Record>();
307
308 Record addARecord(int orderNum, String dishName, int portion, int quota, Menu menu) {
309 Record newRecord = new Record();
310 newRecord.orderNum = orderNum;
311 newRecord.d = menu.dishs.get(menu.searchDish(dishName));
312 newRecord.portion = portion;
313 newRecord.quota = quota;
314 System.out.println(newRecord.orderNum + " " + newRecord.d.name + " " + newRecord.getPrice());
315 return newRecord;
316 }
317
318 int searchReocrd(String name) {
319 for (int i = 0; i < records.size(); i++) {
320 if (records.get(i).d.name == name) {
321 return i;
322 }
323 }
324 return -1;
325 }
326
327 boolean delARecordByOrderNum(int orderNum) {
328 int i = 0, flag = 0;
329 for (i = 0; i < records.size(); i++) {
330 if (records.get(i).orderNum == orderNum) {
331 if (records.get(i).isDeleted == false) {
332 records.get(i).isDeleted = true;
333 } else {
334 System.out.println("deduplication " + orderNum);
335 }
336 flag++;
337 }
338 }
339 if (flag == 0) {
340 System.out.println("delete error;");
341 return false;
342 }
343 return true;
344 }
345 }
346
347 static class Table {
348 Order order = new Order();
349 int num;
350 LocalDateTime time;
351 int weekday;
352 long sum = 0;
353 long origSum = 0;
354
355 void od(Menu menu, String str, String str2, int portion, int quota) {
356 {
357 order.records.add(order.addARecord(Integer.parseInt(str), str2, portion, quota, menu));
358
359 }
360 }
361
362 void getWeekDay() {
363 weekday = time.getDayOfWeek().getValue();
364 }
365
366 void getSum() {
367 for (int i = 0; i < order.records.size(); i++) {
368 if (!order.records.get(i).isDeleted) {
369 origSum += order.records.get(i).getPrice();
370 if (order.records.get(i).d.isT) {
371 if (weekday > 0 && weekday < 6) {
372 sum += Math.round(order.records.get(i).getPrice() * 0.7);
373 } else {
374 sum += order.records.get(i).getPrice();
375 }
376 } else {
377 if (weekday > 0 && weekday < 6) {
378 if (time.getHour() >= 17 && time.getHour() < 20)
379 sum += Math.round(order.records.get(i).getPrice() * 0.8);
380 if (time.getHour() == 20) {
381 if (time.getMinute() <= 30)
382 sum += Math.round(order.records.get(i).getPrice() * 0.8);
383 }
384 if (time.getHour() >= 10 && time.getHour() < 14)
385 sum += Math.round(order.records.get(i).getPrice() * 0.6);
386 if (time.getHour() == 14) {
387 if (time.getMinute() <= 30)
388 sum += Math.round(order.records.get(i).getPrice() * 0.6);
389 }
390 } else
391 sum += order.records.get(i).getPrice();
392 }
393 }
394 }
395
396 }
397
398 boolean isOpen() {
399 if (weekday > 0 && weekday < 6) {
400 if (time.getHour() >= 17 && time.getHour() < 20)
401 return true;
402 if (time.getHour() == 20) {
403 if (time.getMinute() <= 30)
404 return true;
405 }
406 if (time.getHour() > 10 && time.getHour() < 14)
407 return true;
408 if (time.getHour() == 10) {
409 if (time.getMinute() >= 30)
410 return true;
411 }
412 if (time.getHour() == 14) {
413 if (time.getMinute() <= 30)
414 return true;
415 }
416 } else {
417 if (time.getHour() > 9 && time.getHour() < 21)
418 return true;
419 if (time.getHour() == 9) {
420 if (time.getMinute() >= 30)
421 return true;
422 }
423 if (time.getHour() == 21) {
424 if (time.getMinute() <= 30)
425 return true;
426 }
427 }
428 return false;
429
430 }
431 }
432 }
该部分是对菜单题目的升华
import java.time.DateTimeException;
import java.time.Duration;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.Objects;
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Menu menu = new Menu();
ArrayList<Table> tables = new ArrayList<Table>();
ArrayList<User> users = new ArrayList<User>();
Scanner input = new Scanner(System.in);
String str1 = "";
int i = 0;
int portion = 0, quota = 0;
while (true) {// 输入菜单
Dish temp = new Dish();
int isRepeat = -1;
str1 = input.nextLine();
if (str1.matches("[\\S]* [1-9][\\d]*")) {
String[] token = str1.split(" ");
temp.name = token[0];
temp.unit_price = Integer.parseInt(token[1]);
if (temp.unit_price > 300) {
System.out.println(temp.name + " price out of range " + temp.unit_price);
continue;
}
temp.isT = false;
isRepeat = menu.searchDish(temp.name);
if (isRepeat != -1) {
menu.dishes.remove(isRepeat);
}
menu.dishes.add(temp);
} else if (str1.matches("[\\S]* [\\S]* [\\d]* T")) {
String[] token = str1.split(" ");
temp.name = token[0];
temp.unit_price = Integer.parseInt(token[2]);
if (temp.unit_price > 300) {
System.out.println(temp.name + " price out of range " + temp.unit_price);
continue;
}
temp.isT = true;
switch (token[1]) {
case "川菜":
temp.FlavorType = "spicy";
temp.MaxFlavor = 5;
break;
case "晋菜":
temp.FlavorType = "acidity";
temp.MaxFlavor = 4;
break;
case "浙菜":
temp.FlavorType = "sweetness";
temp.MaxFlavor = 3;
break;
}
isRepeat = menu.searchDish(temp.name);
if (isRepeat != -1) {
menu.dishes.remove(isRepeat);
}
menu.dishes.add(temp);
} else if (str1.equals("end")) {
break;
} else if (str1.matches("tab.*")) {
break;
} else {
System.out.println("wrong format");
continue;
}
}
while (!str1.equals("end")) {
Table temp = new Table();
boolean isRepeat = false;
int repeatNum = 0;
if (str1.matches(".*t.*a.*")) {
if (str1.matches(
"table [1-9][\\d]* : [\\S]* [\\d]* [\\d]*/[\\d][\\d]?/[\\d][\\d]? [\\d][\\d]?/[\\d][\\d]?/[\\d][\\d]?")) {
String[] token = str1.split(" ");
temp.userName = token[3];
if(token[3].length()>10) {
str1 = input.nextLine();
System.out.println("wrong format");
continue;
}
temp.callNum = token[4];
if(token[4].length()!=11) {
str1 = input.nextLine();
System.out.println("wrong format");
continue;
}
String headNum = token[4].substring(0, 3);
if(!headNum.equals("180")&&!headNum.equals("181")&&!headNum.equals("189")&&!headNum.equals("133")&&!headNum.equals("135")&&!headNum.equals("136")) {
str1 = input.nextLine();
System.out.println("wrong format");
continue;
}
String[] Date = token[5].split("/");
String[] Time = token[6].split("/");
int[] intDate = new int[5];
int[] intTime = new int[6];
for (i = 0; i < 3; i++) {
intDate[i] = Integer.parseInt(Date[i]);
intTime[i] = Integer.parseInt(Time[i]);
}
temp.num = Integer.parseInt(token[1]);
if (temp.num > 55) {
System.out.println(temp.num + " table num out of range");
str1 = input.nextLine();
continue;
}
try {
temp.time = LocalDateTime.of(intDate[0], intDate[1], intDate[2], intTime[0], intTime[1],
intTime[2]);
temp.getWeekDay();
} catch (DateTimeException e) {
System.out.println(temp.num + " date error");
str1 = input.nextLine();
continue;
}
if (!temp.isOpen()) {
System.out.println("table " + temp.num + " out of opening hours");
str1 = input.nextLine();
continue;
}
if (!(temp.time.isAfter(LocalDateTime.of(2022, 1, 1, 0, 0, 0))
&& temp.time.isBefore(LocalDateTime.of(2024, 1, 1, 0, 0, 0)))) {
System.out.println("not a valid time period");
str1 = input.nextLine();
continue;
}
// 判断桌号是否重复
if (temp.isOpen()) {
for (i = 0; i < tables.size(); i++) {
// 有重复的桌号
if (temp.num == tables.get(i).num && tables.get(i).isOpen()) {
Duration duration = Duration.between(temp.time, tables.get(i).time);
// 同一天
if (duration.toDays() == 0) {
// 在周一到周五
if (temp.weekday > 0 && temp.weekday < 6) {
// 在同一时间段
if (temp.time.getHour() < 15 && tables.get(i).time.getHour() < 15) {
isRepeat = true;
repeatNum = i;
break;
}
}
// 在周末
else {
// 时间相差小于一小时
if (duration.toHours() < 3600) {
repeatNum = i;
isRepeat = true;
break;
}
}
}
}
}
}
System.out.println("table " + temp.num + ": ");
} else {
System.out.println("wrong format");
str1 = input.nextLine();
continue;
}
// 本桌开始点菜
while (true) {
str1 = input.nextLine();
//判断是否为非特色菜
if (str1.matches("[1-9][\\d]* [\\S]* [\\d] [1-9][\\d]*")) {
String[] token = str1.split(" ");
portion = Integer.parseInt(token[2]);
quota = Integer.parseInt(token[3]);
if (menu.searchDish(token[1]) == -1) {
System.out.println(token[1] + " does not exist");
continue;
}
Record tempRecord = new Record();
tempRecord.d = menu.dishes.get(menu.searchDish(token[1]));
tempRecord.orderNum = Integer.parseInt(token[0]);
tempRecord.portion = portion;
tempRecord.quota = quota;
temp.records.add(tempRecord);
System.out.println(tempRecord.orderNum +" "+token[1]+ " " +tempRecord.getPrice());
}
//判断是否为特色菜
else if(str1.matches("[1-9][\\d]* [\\S]* [\\d] [\\d] [1-9][\\d]*")) {
String[] token = str1.split(" ");
int FlavorNum = Integer.parseInt(token[2]);
if(FlavorNum<0||FlavorNum>menu.dishes.get(menu.searchDish(token[1])).MaxFlavor) {
System.out.println(menu.dishes.get(menu.searchDish(token[1])).FlavorType+" num out of range :"+FlavorNum);
continue;
}
portion = Integer.parseInt(token[3]);
quota = Integer.parseInt(token[4]);
if (menu.searchDish(token[1]) == -1) {
System.out.println(token[1] + " does not exist");
continue;
}
Record tempRecord = new Record();
tempRecord.d = menu.dishes.get(menu.searchDish(token[1]));
tempRecord.FlavorNum = FlavorNum;
tempRecord.orderNum = Integer.parseInt(token[0]);
tempRecord.portion = portion;
tempRecord.quota = quota;
temp.records.add(tempRecord);
System.out.println(tempRecord.orderNum +" "+token[1]+" "+ tempRecord.getPrice());
}
// 判断是否为删除订单
else if (str1.matches("[1-9][\\d]* delete")) {
String[] token = str1.split(" ");
int delNum = Integer.parseInt(token[0]);
for(i=0;i<temp.records.size();i++) {
if(temp.records.get(i).orderNum==delNum) {
if(!temp.records.get(delNum).isDeleted) {
temp.records.get(delNum).isDeleted = true;
}
else System.out.println("deduplication :"+delNum);
break;
}
if(i==temp.records.size()-1)System.out.println("delete error");
}
}
// 判断是否为夹杂菜单
else if (str1.matches("[\\S]* [\\d]*")) {
System.out.println("invalid dish");
continue;
} else if (str1.matches("[\\S]* [\\S]* [\\d]* T")) {
System.out.println("invalid dish");
continue;
}
// 判断是否为代点
else if (str1.matches("[\\d]* [\\d]* [\\S].*")) {
String[] token = str1.split(" ");
// 判断代点桌号是否存在
boolean exist = false;
int j = 0;
for (j = 0; j < tables.size(); j++) {
if (tables.get(j).num == Integer.parseInt(token[0])) {
exist = true;
break;
}
}
if (exist) {
System.out.print(Integer.parseInt(token[1]) + " table " + temp.num + " pay for table "
+ Integer.parseInt(token[0]) + " ");
Record treat = new Record();
treat.d = menu.dishes.get(menu.searchDish(token[2]));
if(treat.d.isT) {
treat.FlavorNum = Integer.parseInt(token[3]);
treat.portion = Integer.parseInt(token[4]);
treat.quota = Integer.parseInt(token[5]);
if(treat.d.FlavorType.equals("spicy")) {
tables.get(j).ChuanNum+=treat.quota;
tables.get(j).spicyType +=treat.FlavorNum*treat.quota;
}
if(treat.d.FlavorType.equals("acidity")) {
tables.get(j).JinNum+=treat.quota;
tables.get(j).spicyType +=treat.FlavorNum*treat.quota;
}
if(treat.d.FlavorType.equals("sweetness")) {
tables.get(j).ZheNum+=treat.quota;
tables.get(j).spicyType +=treat.FlavorNum*treat.quota;
}
}
else {
treat.portion = Integer.parseInt(token[3]);
treat.quota = Integer.parseInt(token[4]);
}
System.out.print(treat.getPrice() + "\n");
treat.isTreat = true;
temp.records.add(treat);
}
// 若不存在则输出内容
else {
System.out.println("Table number ：" + Integer.parseInt(token[0]) + " does not exist");
}
} else if (str1.equals("end")) {
break;
} else if (str1.matches("table.*")) {
break;
} else {
System.out.println("wrong format");
continue;
}
}
// 本桌点菜结束，进入下一桌
if (isRepeat) {
for (i = 0; i < tables.get(repeatNum).records.size(); i++) {
for (int j = 0; j < temp.records.size(); j++) {
if (Objects.equals(tables.get(repeatNum).records.get(i).d.name, temp.records.get(j).d.name)) {
if (tables.get(repeatNum).records.get(i).portion == temp.records
.get(j).portion) {
tables.get(repeatNum).records.get(i).quota += temp.records.get(j).quota;
temp.records.remove(j);
}
}
}
}
tables.get(repeatNum).records.addAll(temp.records);
continue;
}
tables.add(temp);
} else {
str1 = input.nextLine();
}
}
// 最终输出桌号订单信息
for (i = 0; i < tables.size(); i++) {
if (tables.get(i).isOpen()) {
tables.get(i).getSum();
tables.get(i).getFlavorNum();
if(i!=0)System.out.print("\n");
tables.get(i).showEnd();
boolean isRepeat = false;
for (User user : users) {
if (tables.get(i).userName.equals(user.userName)) {
user.paidMoney += tables.get(i).sum;
isRepeat = true;
break;
}
}
if(!isRepeat) {
User tempUser = new User();
tempUser.userName = tables.get(i).userName;
tempUser.callNum = tables.get(i).callNum;
tempUser.paidMoney = tables.get(i).sum;
users.add(tempUser);
}
}
}
users.sort(new Comparator<User>() {
public int compare(User a,User b) {
return a.userName.compareTo(b.userName);
}
});
for(i=0;i<users.size();i++) {
System.out.print("\n"+users.get(i).userName +" "+ users.get(i).callNum +" "+ users.get(i).paidMoney);
}
}
static class Dish {
String name;
String FlavorType;
int MaxFlavor;
int unit_price;
boolean isT = false;
}
static class Record {
int orderNum;
Dish d;
int FlavorNum;
int portion;
int quota;
boolean isDeleted = false;
boolean isTreat = false;
int getPrice() {
if (portion == 2)
return (int) Math.round(1.5 * d.unit_price) * quota;
else if (portion == 3)
return 2 * d.unit_price * quota;
else
return d.unit_price * quota;
}
}
static class Menu {
ArrayList<Dish> dishes = new ArrayList<Dish>();
int searchDish(String dishName) {
for (int i = 0; i < dishes.size(); i++) {
if (dishName.equals(dishes.get(i).name)) {
return i;
}
}
return -1;
}
}
static class User{
String userName;
String callNum;
long paidMoney;
}
static class Table {
ArrayList<Record> records = new ArrayList<Record>();
int num;
String userName;
String callNum;
LocalDateTime time;
int weekday;
int ChuanNum = 0;
float spicyType = 0;
int JinNum = 0;
float acidType = 0;
int ZheNum = 0;
float sweetType = 0;
long sum = 0;
long origSum = 0;
void getWeekDay() {
weekday = time.getDayOfWeek().getValue();
}
void getFlavorNum() {
for (Record record : records) {
if (record.d.isT && !record.isDeleted && !record.isTreat) {
if (record.d.FlavorType.equals("spicy")) {
ChuanNum += record.quota;
spicyType += record.FlavorNum * record.quota;
}
if (record.d.FlavorType.equals("acidity")) {
JinNum += record.quota;
acidType += record.FlavorNum * record.quota;
}
if (record.d.FlavorType.equals("sweetness")) {
ZheNum += record.quota;
sweetType += record.FlavorNum * record.quota;
}
}
}
if(ChuanNum!=0)spicyType = Math.round(spicyType/ChuanNum*1.0);
if(JinNum!=0)acidType = Math.round(acidType/JinNum*1.0);
if(ZheNum!=0)sweetType = Math.round(sweetType/ZheNum*1.0);
}
void showEnd() {
System.out.print("table " + num + ": " + origSum + " " + sum);
//输出川菜
if(ChuanNum!=0) {
System.out.print(" 川菜 "+ChuanNum);
switch((int)spicyType) {
case 0 :System.out.print(" 不辣");break;
case 1 :System.out.print(" 微辣");break;
case 2 :System.out.print(" 稍辣");break;
case 3 :System.out.print(" 辣");break;
case 4 :System.out.print(" 很辣");break;
case 5 :System.out.print(" 爆辣");break;
}
}
//输出晋菜
if(JinNum!=0) {
System.out.print(" 晋菜 "+JinNum);
switch((int)acidType) {
case 0 :System.out.print(" 不酸");break;
case 1 :System.out.print(" 微酸");break;
case 2 :System.out.print(" 稍酸");break;
case 3 :System.out.print(" 酸");break;
case 4 :System.out.print(" 很酸");break;
}
}
//输出浙菜
if(ZheNum!=0) {
System.out.print(" 浙菜 "+ZheNum);
switch((int)sweetType) {
case 0 :System.out.print(" 不甜");break;
case 1 :System.out.print(" 微甜");break;
case 2 :System.out.print(" 稍甜");break;
case 3 :System.out.print(" 甜");break;
}
}
}
void getSum() {
for (Record record : records) {
if (!record.isDeleted) {
origSum += record.getPrice();
if (record.d.isT) {
if (weekday > 0 && weekday < 6) {
sum += Math.round(record.getPrice() * 0.7);
} else {
sum += record.getPrice();
}
} else {
if (weekday > 0 && weekday < 6) {
if (time.getHour() >= 17 && time.getHour() < 20)
sum += Math.round(record.getPrice() * 0.8);
if (time.getHour() == 20) {
if (time.getMinute() <= 30)
sum += Math.round(record.getPrice() * 0.8);
}
if (time.getHour() >= 10 && time.getHour() < 14)
sum += Math.round(record.getPrice() * 0.6);
if (time.getHour() == 14) {
if (time.getMinute() <= 30)
sum += Math.round(record.getPrice() * 0.6);
}
} else
sum += record.getPrice();
}
}
}
}
boolean isOpen() {
if (weekday > 0 && weekday < 6) {
if (time.getHour() >= 17 && time.getHour() < 20)
return true;
if (time.getHour() == 20) {
if (time.getMinute() <= 30)
return true;
}
if (time.getHour() > 10 && time.getHour() < 14)
return true;
if (time.getHour() == 10) {
if (time.getMinute() >= 30)
return true;
}
if (time.getHour() == 14) {
return time.getMinute() <= 30;
}
} else {
if (time.getHour() > 9 && time.getHour() < 21)
return true;
if (time.getHour() == 9) {
if (time.getMinute() >= 30)
return true;
}
if (time.getHour() == 21) {
return time.getMinute() <= 30;
}
}
return false;
}
}
}
-
仍未解决的问题：
- 即使优化了代码的结构，代码的运行效率依旧达不到预期的水准，个人猜测是由于判断输入数据格式的方法太过笨拙。
- 使用不可拓展容器来储存变量，有超出容器容量的风险，应当换用ArrayList等容器。这样不仅解决了容器大小的问题，又可以让数据的增删改查更加方便。
- 由于胡乱的增加类，导致类与类的关系变得混乱，应当将Table类与Order类结合起来，可以增加代码的可读性。
总结:
个人感觉本次的题目集对与刚上手的学生来说还有很大难度，此次对于刚开始接触Java的同学来说还是有很大难度的，需要兼顾语法的同时对题目的算法有不错的理解。不然很容易出现欠缺考虑的情况。但通过这次的题目也可以很好人让我们深入了解面向对象设计语言该如何编写，让我们更快的了解Java运行方式。。总体而言，这套菜单系统让我学到了很多新知识，并且使我对代码结构的理解更加深刻，意识到了代码可拓展性的重要。