1 import java.util.*;
 2 public class Demo13{
 3     
 4     /*
 5     Arrays.sort(Object[])可以對任意陣列進行排序，但待排序的元素必須實現Comparable<T>這個泛型介面    
 6     */
 7     
 8     public static void main(String[] args) throws Exception{
 9         String[] arr = {"Davi","Bob","Smith","Alice"};
10         //因為String本身已經實現了Comparable<String>介面,所以可以直接對String陣列進行排序
 

11         Arrays.sort(arr);
12         System.out.println(Arrays.toString(arr));            
13         
14         Person[] arr2 =new Person[]{
15             new Person("Davi",38),
16             new Person("Bob",13),
17             new Person("Smith",24),
18             new Person("Alice",35)
19
 
         };
20         
21         Arrays.sort(arr2);
22         System.out.println(Arrays.toString(arr2));            
23     }
24 }
25 
26 //自定義的Person型別實現Comparable<T>介面
27 class Person implements Comparable<Person>{
28     private String name;
29     private int age;
30     public Person(String name,int
 
 age){
31         this.name = name;
32         this.age = age;
33     }
34         
35     //重寫Comparable<Person>介面
36     @Override
37     public int compareTo(Person other){
38         //使用String類重寫好的comparaTo(String other)方法，name首字母依據字典序列來排列元素
39         return name.compareTo(other.name);
40     }
41     
42     public String toString(){
43         return "(name：" + name + ",age：" + age + ")";
44     }
45     
46 }