15周

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 + "\t" + value);
        }

    }
}