JAVA使用增强for循环和迭代器遍历Map集合

2019独角兽企业重金招聘Python工程师标准>>>

	public static void DemoMap(){
		
		Map<String, String> map = new HashMap<String, String>();
		 
	    // 添加元素
	    map.put("Mon", "星期一");
	    map.put("Tues", "星期二");
	    map.put("Wed", "星期三");
	    map.put("Thur", "星期四");
	    map.put("Fir", "星期五");
	    map.put("Sat", "星期六");
	    map.put("Sun", "星期日");
	 
	    // 通过keySet方法获取所有键值
	    Set<String> keySet = map.keySet();
	    for (String key : keySet) {
	      String value = map.get( key);
	      System.out.println("value:" + value);
	    }
	 
	    // 通过entrySet方法获取所有键值
	    Set<Map.Entry<String, String>> entrySet = map.entrySet();
	    for (Entry<String, String> entry : entrySet) {
	      String entryKey = entry.getKey();
	      String entryValue = entry.getValue();
	      
	      System.out.println("entryValue:" + entryValue);
	    }
	    
	    
	    
	    Iterator<String> iterator = map.keySet().iterator();
        while(iterator.hasNext()){
            String key = iterator.next();
            System.out.println(key+":"+map.get(key));
        }
	    
	    
	 
	}

 

参考链接：http://blog.youkuaiyun.com/hello_zhou/article/details/51583526

转载于:https://my.oschina.net/qimhkaiyuan/blog/909009