Java中的异常重播错误消息

Question

According to this article , new Exception object can be thrown from catch block without specifying "throws" or without enclosing this throw in another try/catch block.

But when i try to do following in Eclipse Juno:

public class Try {

class Trial extends Exception{}

public static void main(String s[]){
    try{
    }catch(Exception e){
            throw  new Trial();
    }
}

}

It shows error messages and ask me to add throw or another try/catch around "throw new Trial();". Is it JVM dependent or am i missing something?

Answer 1

The same article says

This is an unchecked exception: we don't need to declare that we throw it, and the caller doesn't need to explicitly handle it. If such an exception occurs, it will be "mopped up" by the uncaught

So the exception is unchecked which extends RuntimeException

Answer 2

You are throwing a checked exception, compiler just complains because your method signature says otherwise

public static void main(String s[]) throws Trial

should fix it, if you plan to throw it from main.