java泛型草稿

toString()

compareTo()

 1 import java.util.Arrays;
 2 
 3 class Person implements Comparable<Person> {
 4     String name;
 5     int score;
 6     Person(String name, int score) {
 7         this.name = name;
 8         this.score = score;
 9     }
10     public String toString(){
11         return this.name + "," + this.score;
12     }
13     @Override public int compareTo(Person other) {
14         if(this.score > other.score) return 1;
15         else if(this.score < other.score) return -1;
16         else return 0;
17     }
18 
19 }
20 public class demo {
21     public static void main(String[] args) {
22 
23 //        String本身已经实现了Comparable<String>接口
24 //        String[] ss = new String[]{"Orange", "Apple", "AAPear"};
25 //        Arrays.sort(ss);
26 //        System.out.println(Arrays.toString(ss));
27 
28         Person[] ps = new Person[] {
29                 new Person("Bob", 61),
30                 new Person("Alice", 88),
31                 new Person("Lily", 75),
32         };
33         Arrays.sort(ps);
34         System.out.println(Arrays.toString(ps));
35     }
36 }

天涯犹在，不诉薄凉。