List remove an element

	public static void main(String[] args) {
		List<Map<String,Object>> list = new ArrayList<>(16);
		
		for (int i = 0; i < 10; i++) {
			Map<String, Object> map = new HashMap<>(16);
			map.put(String.valueOf(i), CommonUtils.getRandomStr(10, 2));
			list.add(map);
		}
		
		System.out.println(CommonUtils.toJSONStringContainNullValue(list));
		
		
		for (int i = list.size()-1; i >=0 ; i--) {
			if (list.get(i).containsKey("6")) {
				list.remove(i);
			}
		}
		
		
		System.out.println(CommonUtils.toJSONStringContainNullValue(list));
		
		Iterator<Map<String,Object>> it = list.iterator();
		while (it.hasNext()) {
			boolean containsKey = it.next().containsKey("1");
			if (containsKey) {
				it.remove();
			}
		}
		System.out.println(CommonUtils.toJSONStringContainNullValue(list));
		
		
		
		
		for (int i = 0; i < list.size(); i++) {
			if (list.get(i).containsKey("4")) {
				list.remove(i--);
			}
		}
		System.out.println(CommonUtils.toJSONStringContainNullValue(list));
	}	

Output results ：

[{"0":"mQMmxEaGpp"},{"1":"hKQORyfYpO"},{"2":"FvyuTFTHFn"},{"3":"kJQcOFwZYy"},{"4":"lQKPiPDZST"},{"5":"fLQopHVlmP"},{"6":"ubFoVIuHlN"},{"7":"BotCiWFiCX"},{"8":"YNOUZavaBy"},{"9":"yBZGHuhfOo"}]
[{"0":"mQMmxEaGpp"},{"1":"hKQORyfYpO"},{"2":"FvyuTFTHFn"},{"3":"kJQcOFwZYy"},{"4":"lQKPiPDZST"},{"5":"fLQopHVlmP"},{"7":"BotCiWFiCX"},{"8":"YNOUZavaBy"},{"9":"yBZGHuhfOo"}]
[{"0":"mQMmxEaGpp"},{"2":"FvyuTFTHFn"},{"3":"kJQcOFwZYy"},{"4":"lQKPiPDZST"},{"5":"fLQopHVlmP"},{"7":"BotCiWFiCX"},{"8":"YNOUZavaBy"},{"9":"yBZGHuhfOo"}]
[{"0":"mQMmxEaGpp"},{"2":"FvyuTFTHFn"},{"3":"kJQcOFwZYy"},{"5":"fLQopHVlmP"},{"7":"BotCiWFiCX"},{"8":"YNOUZavaBy"},{"9":"yBZGHuhfOo"}]