The solution, of course, is to add the def keyword to numstr in the toString method.

当然，解决方案也是在toString方法中将 def关键字添加到 numstr。

youdao

The solution, of course, is to add the def keyword to numstr in the toString method.

当然，解决方案也是在toString方法中将 def关键字添加到 numstr。

youdao