TreeSet 排序

 1 class Person1 implements Comparable <Person1>{
 2     private Float height;
 3     private String name;
 4     
 5     Person1(float height)
 6     {
 7         this.height=height;
 8     }
 9 
10     public Float getHeight() {
11         return height;
12     }
13 
14     public void setHeight(float height) {
15         this.height = height;
16     }
17 
18     public String getName() {
19         return name;
20     }
21 
22     public void setName(String name) {
23         this.name = name;
24     }
25 
26     @Override
27     public int compareTo(Person1 p) {
28         if(this.getHeight()<p.getHeight()){
29             return 1;
30             
31         }else if(this.getHeight()>p.getHeight()){
32             return -1;
33         }else{
34             return 0;    
35         }
36         
37     }
38 }
39 
40 
41 public class Question3_1 {
42 
43     public static void main(String[] args) {
44         Person1 p1=new Person1(23.4f);
45         p1.setName("Stud1");
46         Person1 p2=new Person1(2.34f);
47         p2.setName("Stud2");
48         Person1 p3=new Person1(34.32f);
49         p3.setName("Stud3");
50         Person1 p4=new Person1(56.45f);
51         p4.setName("Stud4");
52         Person1 p5=new Person1(21.4f);
53         p5.setName("Stud5");
54         
55       
56         TreeSet<Person1> al=new TreeSet<Person1>();
57         al.add(p1);
58         al.add(p2);
59         al.add(p3);
60         al.add(p4);
61         al.add(p5);
62         
63        
65         for(Person1 p:al)
66             System.out.println(p.getName()+" "+p.getHeight());
67 
68     }
69 
70 }