Exception on overridden methods

Question

hi ,
we know that An overriding method in a subclass may only throw exceptions declared in the parent class or children of the exceptions declared in the parent class. but in a program it is written
class base {
public static void method1() {
public class child extends base
public static void method1() throws ArrayIndexOutOfBoundsException
its being compiled ok.
but when me writting
class base {
public static void method1() {
public class child extends base
public static void method1() throws Exception
its giving compilation error.
please explain this....

Answer 1

hi ,
we know that An overriding method in a subclass may
only throw exceptions declared in the parent class or
children of the exceptions declared in the parent
class. but in a program it is written
This only applies to checked exceptions. It does not apply to unchecked exceptions like ArrayIndexOutOfBounds. Methods that throw unchecked exceptions do not need to have a throws cause, although including a throws cause for an unchecked exception is allowed.
If you change your code so the method throws a checked exception, you will get the error.
http://java.sun.com/docs/books/jls/third_edition/html/exceptions.html#67305