java中遍历HashMap的方法

Java中，通常有两种遍历HashMap的方法，大家可以参考一下：
转自：http://blog.csdn.net/newcnzz/article/details/8434631

import java.util.*;  
public class MapTest {  
    static HashMap<String, Integer> hashMap = new HashMap<String, Integer>();    
    public static void main(String [] args) {  
        hashMap.put("one", 1);  
        hashMap.put("two", 2);  
        hashMap.put("three", 3);  
        hashMap.put("four", 4);  
        hashMap.put("five", 5);    
        Iterator iter = hashMap.entrySet().iterator();    
        // the first method to travel the map
        while (iter.hasNext()) {  
            Map.Entry<String, Integer> entry = (Map.Entry<String, Integer>) iter.next();   
            String key = entry.getKey();  
            Integer value = entry.getValue();     
            System.out.println(key + " " + value);  
        }    
        iter = hashMap.keySet().iterator();   
        // the second method to travel the map  
        while (iter.hasNext()) {  
            String key = (String) iter.next();  
            Integer value = hashMap.get(key);      
            System.out.println(key + " " + value);  
        }  
    } // close main()  
}