package com.boonya.map;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import java.util.Set;import java.util.Map.Entry;public class EntryTest {		public class User{		@SuppressWarnings("unused")		private String name;		@SuppressWarnings("unused")		private int id;		public User(String name, int id) {			this.name = name;			this.id = id;		}			}	/**	 * HashMap散列存储，无序性	 * u2 : com.boonya.map.EntryTest$User@1b90b39     * u4 : com.boonya.map.EntryTest$User@18fe7c3     * u1 : com.boonya.map.EntryTest$User@b8df17     * u3 : com.boonya.map.EntryTest$User@13e8d89	 * @param args	 */	@SuppressWarnings("unchecked")	public static void main(String[] args) {		Map
    
      map=new HashMap
     
      ();		User u1=new User("boonya", 1);		User u2=new User("boonya2", 2);		User u3=new User("boonya3", 3);		User u4=new User("boonya4", 4);		map.put("u1", u1);		map.put("u2", u2);		map.put("u3", u3);		map.put("u4", u4);		Set set=map.entrySet();		Iterator itor=set.iterator();		while (itor.hasNext()) {			 Entry
      
         entry=(Entry
       
        ) (itor.next());			 System.out.print(entry.getKey()+" : ");			 System.out.println(entry.getValue()+" ");		}	}}