HashMap的遍历

[java]代码库

方法1：  
HashMap staff = new HashMap();   
Set entries = staff.entrySet();   
Iterator iter = entries.iterator();   
while(iter.hasNext())   
{   
      Map.Entry entry = (Map.Entry)iter.next();   
      Object key = entry.getKey();   
      Object value = entry.getValue();   
}  
  
方法2：  
Map map = new HashMap();  
for(Iterator iter = map.entrySet().iterator(); iter.hasNext();) {  
    Map.Entry entry = (Map.Entry) iter.next();    //map.entry 同时取出键值对  
    Object key = entry.getKey();  
    Object val = entry.getValue();  
}  
  
方法3：  
Map map = new HashMap();  
for (Iterator iter = map.keySet().iterator(); iter.hasNext();) {  
    Object key = iter.next();  
    Object val = map.get(key);  
}  
方法4：
       Set set2 = map.entrySet();
          for(Object i:set2)
          {
               Entry entry = (Entry)i;
               System.out.println(entry.getKey()+"--"+entry.getValue());
          }