每日总结(7)

所用时间:一下午

代码:83

博客:3

知识点:

Android的案例计算器

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 1 package com.text;
 2 
 3 import org.omg.CORBA.WStringSeqHelper;
 4 
 5 import java.io.*;
 6 import java.util.ArrayList;
 7 import java.util.Objects;
 8 
 9 public class file4 {
10     public static void main(String[] args) throws Exception {
11         File file = new File("src/input3919.txt");
12         if (file.exists() && file.length() == 0) {
13             System.out.println("  文件为空！");
14             System.exit(0);
15         } else if (achieve() == 1) {
16             System.out.println("  文件只有一個單詞！");
17             System.exit(0);
18         } else {
19             achieve();
20         }
21     }
22 
23     public static long achieve() throws Exception {
24         // ArrayList<String> list = new ArrayList<String>();
25         ArrayList<String> list2 = new ArrayList<String>();//存储遍历结果
26 
27         File f1 = new File("src/text.txt");
28         BufferedReader br = new BufferedReader(new FileReader(f1));
29         //定义个字符串用来保存每次读取的数据
30         String len;
31         StringBuffer sb = new StringBuffer();
32         while ((len = br.readLine()) != null) {
33             sb.append(len);//将文件内容存入sb中
34         }
35         //不区分大小写
36         String str = sb.toString().toLowerCase();
37         String[] strings = str.split("[^a-zA-Z\\']+");
38 
39         String tail, head, word;
40         long total = 1, max = 0;
41 
42         for (int i = 0; i < Objects.requireNonNull(strings).length; i++) {
43             ArrayList<String> list1 = new ArrayList<String>();//存储遍历结果
44             total = 1;
45 
46             word = strings[i];
47             list1.add(word);
48             tail = word.substring(word.length() - 1, word.length());
49 
50             // System.out.println(word);
51 
52             for (int j = i + 1; j < Objects.requireNonNull(strings).length; j++) {
53                 word = strings[j];
54                 head = word.substring(0, 1);
55                 if (tail.equals(head)) {
56                     list1.add(word);
57                     //System.out.println(list1.get(i));
58                     tail = word.substring(word.length() - 1, word.length());
59                     total++;
60                 } else {
61                     //System.out.println(total);
62                     if (total > max) {
63 
64                         list2 = list1;
65                         max = total;
66                     }
67                     break;
68                 }
69             }
70         }
71         System.out.println(max);
72 
73         File file = new File("src/output.txt");
74         FileWriter out = new FileWriter(file);
75         for (int i = 0; i < list2.size(); i++) {
76             System.out.println(list2.get(i));
77             out.write(list2.get(i) + " ");
78         }
79         br.close();
80         out.close();
81         return max;
82     }
83 }