Java方法中对基本类型参数的修改

public static void main(String[] args) {
        int count = 0;
        Map map = new HashMap<>();
        map.put("person", "张三");
        testParam(count, map);
        System.out.println("count: " + count); // 0
        System.out.println("person: " + map.get("person")); // 李四
    }

    private static void testParam(int count, Map map) {
        count = count + 1;
        map.put("person", "李四");
    }