3137102440_曹庆发。单元测试和代码覆盖率工具的使用

 1 import java.util.ArrayList;
 2 import java.util.Collections;
 3 import java.util.Comparator;
 4 import java.util.HashMap;
 5 import java.util.List;
 6 import java.util.Map;
 7 import java.util.Scanner;
 8 import java.util.Map.Entry;
 9 
10 public class Count {
11     private static String str;
12     public  Count (String str){
13         Count.str=str;
14     }
15     public static void main(String[] args) {
16         System.out.print("请输入您要测试的字符串：");
17         Scanner in=new Scanner(System.in);
18         str = in.nextLine();
19         count(str);
20         
21     }
22     
23     public static void count(String str){
24         String[] items = str.split(" ");
25         Map<String, Integer> map = new HashMap<String, Integer>();
26         for (String s : items) {
27             if (map.containsKey(s))
28                 map.put(s, map.get(s) + 1);
29             else {
30                 map.put(s, 1);
31             }
32         }
33         List<Entry<String, Integer>> list = new ArrayList<Entry<String, Integer>>();
34         for (Entry<String, Integer> entry : map.entrySet()) {
35             list.add(entry);
36         }
37         Collections.sort(list, new EntryComparator());
38 
39         for (Entry<String, Integer> obj : list) {
40             System.out.println(obj.getKey() + "\t" + obj.getValue());
41         }
42     }
43 }
44 
45 class EntryComparator implements Comparator<Entry<String, Integer>> {
46     public int compare(Entry<String, Integer> o1, Entry<String, Integer> o2) {
47         return o1.getValue() > o2.getValue() ? 0 : 1;
48     }
49 } 

import org.junit.Test;

public class CountTest {
    
    @Test
    public void testCount() throws Exception {
        String str="i love you! and you? ";
        Count.count(str);
    }

}