java new 對象時，類名添加括號和不加括號的區別

 

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

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