Java Exception 博客分类： Java JavaAccess

程序出错时至少需要做的三件事

• Notify the user of an error;
• Save all work;
• Allow users to gracefully exit the program.

 Eception的分类

• Throwable
  • Error
  • Exception
    • RuntimeException
    • IOException

RuntimeException

A bad cast;

An out-of-bounds array access;

A null pointer access.