编程错误

• To free developers of dealing with the sorts of exceptions that occur as a result of programming errors or that the program could not be expected to catch dereferencing a null pointer , falling off the end of an array , dividing by zero , and so on , some exceptions are nominated as unchecked exceptions those that derive from
  对于因为编程错误而导致的异常，或者是不能期望程序捕获的异常（解除引用一个空指针，数组越界，除零，等等） ，为了使开发人员免于处理这些异常，一些异常被命名为非检查型异常（即那些继承自