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创建Map集合,创建Emp对象,并将创建的Emp对象添加到集合中,并将id为005的对象从集合中移除
创建Emp类:
package jihe; public class Emp { private String id; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } private String name; public Emp(String id, String name) { super(); this.id = id; this.name = name; }
创建Map类并测试:
package jihe; import java.util.*; public class lianxi1 { public static void main(String[] args) { Map<String,String> map=new HashMap<>(); Emp emp=new Emp("001","汉堡"); Emp emp1=new Emp("002","薯条"); Emp emp2=new Emp("003","咖啡"); Emp emp3=new Emp("004","牛奶"); Emp emp4=new Emp("005","鸡翅"); Emp emp5=new Emp("006","鸡腿"); map.put(emp.getId(), emp.getName()); map.put(emp1.getId(), emp1.getName()); map.put(emp2.getId(), emp2.getName()); map.put(emp3.getId(), emp3.getName()); map.put(emp4.getId(), emp4.getName()); map.put(emp5.getId(), emp5.getName()); map.remove(emp4.getId()); Set <String> k=map.keySet(); Iterator<String> it=k.iterator(); while(it.hasNext()) { String str=it.next(); System.out.println(str+" "+map.get(str)); } } }
测试结果:
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原文地址:http://www.cnblogs.com/jakeasd/p/5543671.html