第十五周作业

package shier;

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

public class test1 {
    public static void main(String[] args) {
        Map<String, String> map=new HashMap<>();
        map.put("亚亚","Q妹");
        map.put("菲菲","Q妹");
        map.put("欧欧","Q仔");
        map.put("美美","Q妹");
        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);
        }
    }
}

在上机3的基础上，为企鹅添加一个编号，并作为键存储多个企鹅信息到应用泛型的HashMap集合 使用Iterator、foreach语句进行遍历

package shier;

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

public class test2 {
    public static void main(String[] args) {
         Map<String,String> map=new HashMap();
            map.put("亚亚","Q妹");
            map.put("菲菲","Q妹");
            map.put("欧欧","Q仔");
            map.put("美美","Q妹");
            System.out.println("使用iterator遍历");
            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);
            }
            System.out.println("使用foreach遍历");
            for (String key : keyset) {
                String sex = map.get(key);
                System.out.println(key + "\t" + sex);
            }
    }
}