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【Java】 HashMap中的内容进行迭代输出

作者:Alex / 发布于2016/12/21/ 677

package demo20130418;  
import java.util.HashSet;  
import java.util.Iterator;  
import java.util.Map;  
import java.util.HashMap;  
import java.util.Map.Entry;  
import java.util.Set;  
public class MapDemo {  
  
    /** 
     * @param args 
     */  
    public static void main(String[] args) {  
        // TODO Auto-generated method stub  
        Map<Integer,User> map=new HashMap<Integer,User>();  
        User user=new User(1,"ctl","qq.com",'m');  
        map.put(user.getId(), user);  
        user=new User(2,"lr","qq.com",'w');  
        map.put(user.getId(), user);  
        System.out.println(map);  
        Set<Entry<Integer,User>> set=map.entrySet();  
        Iterator it=set.iterator();  
        for(;it.hasNext();){  
            System.out.println(it.next());  
        }  
                //new HashSet<Entry<Integer,User>>();  
        //Iterator<Integer,User> iterator=map  
    }  
  
}  
class User{  
    private int id;  
    private String name;  
    private String email;  
    private char sex;  
    public User(int id, String name, String email, char sex) {  
        super();  
        this.id = id;  
        this.name = name;  
        this.email = email;  
        this.sex = sex;  
    }  
    public int getId() {  
        return id;  
    }  
    public void setId(int id) {  
        this.id = id;  
    }  
    public String getName() {  
        return name;  
    }  
    public void setName(String name) {  
        this.name = name;  
    }  
    public String getEmail() {  
        return email;  
    }  
    public void setEmail(String email) {  
        this.email = email;  
    }  
    public char getSex() {  
        return sex;  
    }  
    public void setSex(char sex) {  
        this.sex = sex;  
    }  
    public String toString(){  
        return id+" "+name+" "+email+" "+sex;  
    }  
}

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