java 对象数组定义

 1 public class Student {
 2 
 3     private String username;
 4     private int num;
 5 
 6     public Student(String username, int num) {
 7         this.username = username;
 8         this.num = num;
 9     }
10 
11     public static void main(String[] args) {
12         Student s[] = new Student[10];
13         for (int i = 0; i < s.length; i++) {
14             s[i] = new Student(i + "", i);
15             System.out.println(s[i]);
16         }
17 
18     }
19 
20     public String getUsername() {
21         return username;
22     }
23 
24     public void setUsername(String username) {
25         this.username = username;
26     }
27 
28     public int getNum() {
29         return num;
30     }
31 
32     public void setNum(int num) {
33         this.num = num;
34     }
35 
36     @Override
37     public String toString() {
38         return this.num + " " + this.username;
39     }
40 
41 }