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0309 java.util.Map.Entry

import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Set; public class Main { public static void main(String[] a) { Map<String,String> map = new HashMap<String,String>(); map.put("key1", "value1"); map.put("key2", "value2"); map.put("key3", "value3"); Set set = map.entrySet(); Iterator iter = set.iterator(); while (iter.hasNext()) { Map.Entry entry = (Map.Entry) iter.next(); System.out.println(entry.getKey() + " -- " + entry.getValue()); } } }