java new 对象时，类名添加括号和不加括号的区别

对象 https://blog.csdn.net/u012920673/article/details/51176811?utm_source=distribute.pc_relevant.none-task

函数 https://blog.csdn.net/xuexi_b/article/details/79618188?utm_source=distribute.pc_relevant.none-task