List&Map用循环获取集合中的值

map循环

Map map= new HashMap();
		map.put("1", "qiao1");
		map.put("2", "qiao2");
		map.put("3", "qiao3");
		map.put("4", "qiao4");
		map.put("5", "qiao5");
		Iterator iterator2=map.entrySet().iterator();
		//JDK 1.4
		while(iterator2.hasNext()){
			Map.Entry   entry= (Map.Entry)iterator2.next();   
			System.out.println("key:="+entry.getKey());
			System.out.println("key:="+entry.getValue());
			System.out.println("all:="+iterator2.next());
		}
		//JDK 1.5 
		for(Object o: map.keySet()){
			System.out.println("key:="+o);
			System.out.println("value:+"+map.get(o));
		}

 list loop

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class test {
	public static void main(String[] args) {
		List <Object>list = new ArrayList<Object>();
		list.add("qincy");
		list.add("qincy2");
		list.add("qincy3");
		list.add("qincy4");
		list.add("qincy5");
		
		//JDK1.4
		Iterator iterator = list.iterator();
		System.out.println("iterator===============");
		while(iterator.hasNext()){
			System.out.println("1list value:"+iterator.next());
			
		}
		System.out.println("old-for loop===============");
		for(int i=0;i<list.size();i++){
			System.out.println("2list value:"+list.get(i));
		}
		System.out.println("new-for loop===============");
		for(Object o: list){
			System.out.println("3value:="+o);
			
		}
	}

}