1 import java.util.Arrays;
 2 import java.util.Comparator;
 3 
 4 class ResStrSort{
 5     public static void main(String[] args) {
 6         String strs[] = {"dog","cat","horse","cow"};
 7         System.out.println("Initial order: ");
 8         for(String s:strs) {
 9             System.out.print(s + " ");
10         }
11         System.out.println();
12         
13         ResStrComp rsc = new ResStrComp();
14         //将数组 与 比较器传递给Arrays.sort();
15         Arrays.sort(strs, rsc);
16         System.out.println("Sorted in reverse order: ");
17         for(String s:strs){
18             System.out.print(s + " ");
19         }
20         System.out.println();
21         
22         Arrays.sort(strs);
23         System.out.println("Sirted in natural order: ");
24         for(String s:strs){
25             System.out.print(s + " ");
26         }
27         System.out.println();
28     }
29 }
30 /**
31  * Comparator是泛型接口
32  */
33 class ResStrComp implements Comparator<String>{
34 
35     @Override
36     public int compare(String o1, String o2) {
37         return o2.compareTo(o1);//关键所在
38     }
39     
40 }