java迭代map

java迭代map：

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;

public class TestMap {
    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Map m = new HashMap();
        m.put("sb", "s");
        m.put("bs", "b");
        Iterator<Entry<String, String>> it = m.entrySet().iterator();
         while (it.hasNext()) {
             Map.Entry<String, String> entry =  it.next();  
             String key = entry.getKey();  
             String value = entry.getValue();
             System.out.println("key = " + key + "; value = " + value); 
         }
    }
}