字符串数组逆序

 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 }

字符串数组逆序