Java中Map循环的两种方式

JDK1.5:
public void TestMap15(){
Map map = new HashMap();
for(Object o : map.keySet()){
map.get(o);
}
}

JDK1.4:
public void TestMap14(){
Map map = new HashMap();
Iterator it = map.entrySet().iterator();
while(it.hasNext()){
Map.Entry entry = (Map.Entry) it.next();
Object key = entry.getKey();
Object value = entry.getValue();
}
}