package pra; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Set; public class Text4 { public static void main(String[] args) { Map<String, String> map = new HashMap(); map.put("欧欧", "Q仔"); map.put("亚亚", "Q妹"); map.put("菲菲", "Q妹"); map.put("美美", "Q妹"); System.out.println("企鹅的昵称和品种分别是:"); Set<String> keyset = map.keySet(); Iterator<String> iter = keyset.iterator(); while (iter.hasNext()) { String key = iter.next(); String value = map.get(key); System.out.println(key + " " + value); } } }