List&Map用循环获取集合中的值

map循环

Java代码  

1. Map map= new HashMap();  
2.         map.put("1", "qiao1");  
3.         map.put("2", "qiao2");  
4.         map.put("3", "qiao3");  
5.         map.put("4", "qiao4");  
6.         map.put("5", "qiao5");  
7.         Iterator iterator2=map.entrySet().iterator();  
8.         //JDK 1.4  
9.         while(iterator2.hasNext()){  
10.             Map.Entry   entry= (Map.Entry)iterator2.next();     
11.             System.out.println("key:="+entry.getKey());  
12.             System.out.println("key:="+entry.getValue());  
13.             System.out.println("all:="+iterator2.next());  
14.         }  
15.         //JDK 1.5   
16.         for(Object o: map.keySet()){  
17.             System.out.println("key:="+o);  
18.             System.out.println("value:+"+map.get(o));  
19.         }  

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

Java代码  

1. import java.util.ArrayList;  
2. import java.util.Iterator;  
3. import java.util.List;  
4.   
5. public class test {  
6.     public static void main(String[] args) {  
7.         List <Object>list = new ArrayList<Object>();  
8.         list.add("qincy");  
9.         list.add("qincy2");  
10.         list.add("qincy3");  
11.         list.add("qincy4");  
12.         list.add("qincy5");  
13.           
14.         //JDK1.4  
15.         Iterator iterator = list.iterator();  
16.         System.out.println("iterator===============");  
17.         while(iterator.hasNext()){  
18.             System.out.println("1list value:"+iterator.next());  
19.               
20.         }  
21.         System.out.println("old-for loop===============");  
22.         for(int i=0;i<list.size();i++){  
23.             System.out.println("2list value:"+list.get(i));  
24.         }  
25.         System.out.println("new-for loop===============");  
26.         for(Object o: list){  
27.             System.out.println("3value:="+o);  
28.               
29.         }  
30.     }  
31.   
32. }