User Defined Exception in Java

public class ExceptionExOther {

public void methodA() throws UserDefinedException
{
try
{
System.out.println("Inside MethodA");
throw new UserDefinedException("Demo");
}
finally
{
System.out.println("MethodA's finally");
}
}

public static void main(String[] args) {

ExceptionExOther ex=new ExceptionExOther();
try {
ex.methodA();
} catch (UserDefinedException e) {
System.out.println("Caught "+e);
}
}

}

User Defined Exception

public class UserDefinedException extends Exception {

private String string;

public UserDefinedException(String str)

{

string=str;

}

public String toString()

{

return "UserDefinedException "+string;

}

}