Omitting the constructor argument list and enclosing parentheses is equivalent to specifying an empty argument list.

省略构造函数参数列表和封闭的圆括号等价于指定一个空参数列表。

youdao

Omitting the constructor argument list and enclosing parentheses is equivalent to specifying an empty argument list.

省略构造函数参数列表和封闭的圆括号等价于指定一个空参数列表。

youdao