VIP33/src/main/java/com/sf/day17/Test01.java

package com.sf.day17;

import org.junit.Test;

import java.util.HashMap;
import java.util.Map;

public class Test01 {
    @Test
    public void t1(){
        Map<String, String> map = new HashMap<String, String>();
        map.put("username","zhangsan");
        map.put("username1","zhangsan");
        map.put("username2","zhangsan");
        map.put("username3","zhangsan");
        for (Map.Entry<String, String> entry : map.entrySet()) {
            System.out.println("key= " + entry.getKey() + " and value= " + entry.getValue());
        }

    }
}