Java_遍历map的几种方法

public class Test{ 
public static void main(String[] args) {
Map<String,String> map = new HashMap<String,String>(); 
map.put("id1", "wang"); 
map.put("id2", "li"); 
 
//通过keySet
Set<String> set = map.keySet(); 
for(String s:set){ System.out.println(s + "," + map.get(s)); } 
 
//通过entrySet
Set<Map.Entry<String, String>> entryseSet = map.entrySet(); 
for(Map.Entry<String, String> entry:entryseSet){ System.out.println(entry.getKey()+","+entry.getValue()); } 
 
//K Iterator
Iterator<String> it = map.keySet().iterator(); 
while(it.hasNext()){ System.out.println(map.get(it.next())); } 
 
//V Iterator
Iterator it = map.values().iterator(); 
while(it.hasNext()){ 
String val = (String)it.next(); 
System.out.println(val); 
} 
}
}