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);
}
}
}