6.12

Posted 2020-12-10 xxy02160216

1、使用HashMap存储多个企鹅信息，然后统一使用Iterator进行遍历使用HashMap存储多个企鹅信息，然后统一使用Iterator进行遍历

package fffffr;

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+"	"+value);
        }
    }
}

2.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 pro2;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
public class Test {
    public static void main(String[] args) {
        Map<String, String> map = new HashMap();
        map.put("yaya", "Q妹");
        map.put("feifei", "Q妹");
        map.put("ouou", "Q仔");
        map.put("meimei", "Q妹");
        System.out.println("分别是:");
        System.out.println("使用iterator遍历");
        Set<String> nameset = map.keySet();
        Iterator<String> iter = nameset.iterator();
        while (iter.hasNext()) {
            String name = iter.next();
            String sex = map.get(name);
            System.out.println(name + "	" + sex);
        }
        System.out.println("使用foreach遍历");
        for (String name : nameset) {
            String sex = map.get(name);
            System.out.println(name + "	" + sex);
        }
    }
}