qq_41243979的博客

https://blog.youkuaiyun.com/luckykapok918/article/details/79279447 https://blog.youkuaiyun.com/qq_39477018/article/details/105862242

public static void main(String[] args) { int i=1; System.out.println(getType(i)); } public static String getType(Object o) { return o.getClass().toString(); } 参考

https://cloud.tencent.com/developer/article/1532402 /** * @Author https://www.javastudy.cloud * @CreateTime 2019/10/31 **/ public class HashMapStudy { public static void main(String[] args) { //一般来说,最好初始化一下, 小于12的就不要初始化了 // 默认的就是16,