package cn.sdut.lah;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import java.util.Map.Entry;import java.util.Set;import org.junit.After;import org.junit.Before;import org.junit.Test;public class Demo2 {		Map map = null;	@Before	public void before(){	    map = new HashMap();//若要按照存入的顺序输出，则使用linkedHashMap		map.put(1, "唐僧");		map.put(2, "猪八戒");		map.put(3, "孙悟空");	}	/**	 * way1: 先获取键集合，由键的到值	 */	@Test	public void test1(){				//使用迭代器遍历		Set set = map.keySet();		Iterator it = set.iterator();		while(it.hasNext()){			int key = (int) it.next();			String value = http://www.mamicode.com/(String) map.get(key);": "+value);		}			}	@Test	public void test11(){				//使用增强for循环遍历		for (Object obj:map.keySet()){			 int key = (int) obj;			 String value = http://www.mamicode.com/(String) map.get(key);": "+value);		 }	}		/**	 * way2:先获取键值对集合，从而得到键和值	 */	@Test	public void test2(){				//使用迭代器遍历		Set set = map.entrySet();		Iterator it = set.iterator();	    while(it.hasNext()){	    	Map.Entry entry = (Entry) it.next();	    	int key = (int) entry.getKey();	    	String value = http://www.mamicode.com/(String) entry.getValue();": "+value);	    }	}		public void test22(){				//使用增强for循环遍历		for (Object obj:map.entrySet()){			Map.Entry entry = (Entry) obj;			int key =  (int) entry.getKey();			String value = http://www.mamicode.com/(String) entry.getValue();": "+value);		}	}	@After	public void after(){		map = null;	}}