maptest.java

加密解密技巧

package com.collection;

import java.util.HashMap;
import java.util.Iterator;

public class MapTest {
	public static void main(String[] args) {
		HashMap map = new HashMap();
		Student student = new Student();
		Student student1 = new Student();
		map.put("key1","value1");
		map.put(1, 1);
		map.put(2,student);
		map.put(2, 1);
		map.put("student1",student1);
		System.out.println(map.get("key1"));
		System.out.println(map.get(1));
		System.out.println(map.get(2));
		System.out.println(map.get("student1"));
		System.out.println("**********");
		Iterator iterator = map.keySet().iterator();
		while(iterator.hasNext()){
			System.out.println(map.get(iterator.next()));
			
		}
	}

}