Hi Friend,

We use 'throws' to make the method to throw exceptions rather than having to handle the exceptions in the code.

For more information, visit the following links:

http://www.roseindia.net/java/exceptions/how-to-throw-exceptions.shtml
http://www.roseindia.net/java/exceptions/

Thanks

try/catch blocks are used for proveiding user under standable message on cosoule. where as throw use to make the related exception in our program.
where as throws used for just report exception to jvm it does not make the any exception.

when we are comeing to checked/unchecked exception here we findout main use for throw/throws.

when we raise the checked exception using throw here before raising thatr one must inform that exception using throws.see below program

class exceptioncase
{
static void m1()throws IlligalArgumentException
{
System.out.println("static void m1()");
throw newIlligalArgumentException();
}
public static void main(String[] args)
{
System.out.println("main()");
}
}

IAE is checked exception,here we can not stmt
"throws IlligalArgumentException" it leads to compiletime error:
unreported exception.

main use of try/catch is program terminate normaly.