14.7-3

Emp类

 1 package jihe;
 2
 3 public class Emp {
 4
 5     public String id;
 6     public String name;
 7
 8     public Emp(String id, String name)
 9     {
10         this.id = id;
11         this.name =name;
12     }
13
14 }

Test类

 1 package jihe;
 2
 3 import java.util.*;
 4
 5 public class Test {
 6
 7     public static void main(String[] args)
 8     {
 9
10         //创建Map集合
11         Map<String,String> map = new HashMap<>();
12
13         //创建Emp对象
14         Emp emp = new Emp("011","aaa");
15         Emp emp1 = new Emp("012","bbb");
16         Emp emp2 = new Emp("013","ccc");
17         Emp emp3 = new Emp("014","ddd");
18         Emp emp4 = new Emp("015","eee");
19         Emp emp5 = new Emp("016","fff");
20
21         //将Emp对象添加到Map集合中
22         map.put(emp.id, emp.name);
23         map.put(emp1.id, emp1.name);
24         map.put(emp2.id, emp2.name);
25         map.put(emp3.id, emp3.name);
26         map.put(emp4.id, emp4.name);
27         map.put(emp5.id, emp5.name);
28
29         //移除id为015的对象
30         map.remove("015");
31
32         //遍历集合，打印
33         Set<String> set = map.keySet();
34         for(String id : set)
35         {
36             System.out.println("id = " + id + " name = " + map.get(id));
37         }
38
39     }
40
41 }

运行结果

id = 011 name = aaa
id = 012 name = bbb
id = 013 name = ccc
id = 014 name = ddd
id = 016 name = fff