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  • 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

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  • 原文地址:https://www.cnblogs.com/dirgo/p/4886610.html
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