Java: IllegalAccessException

Question

There is an error while compiling this. Whereas there is no error when I try to throw a NullPointerException. Could anyone please help me on this one? Thanks.

class ThrowsDemo {
    static void throwOne(){
        System.out.println("Inside throwOne.");
        throw new IllegalAccessException("demo");
    }


    public static void main(String args[]){
        try{
            throwOne();
        } catch (IllegalAccessException e) {
            System.out.println("Caught " + e);
        }
    }
}

Answer 1

因为IllegalAccessException是一个已检查的异常，所以您必须向throwOne（）添加throws IllegalAccessException ，以通知任何调用方法它们需要处理它。

static void throwOne() throws IllegalAccessException {

Answer 2

Because IllegalAccessException is chceked exception you must declare that your method can throws this exception. Just add to throwOne method definition 'throws IllegalAccesException'