void()   is  an access modifier 

In java JOptionPane is an inner class

  Mark and sweep model is a  garbage collection technique 

getMessage() methods return localized description of an exception 

 The object of Matcher class is used to compile a regular expression 

Which of the following is not a oops concept?

The component used to compile , debug and execute a java program is  

 Which capturing group can represent the entire expression 

Which Java package is used for creating graphical user interfaces (GUIs)?

Where is the error in this program?

class Out 

{

        public static int mul(int ...x)

        {

             return; 

        }

        static void main(String args[]) 

        {    

             mul(10);//Line 1

             mul(10,20);//Line 2

             mul(10,20,30);//Line 3

             mul(10,20,30,40);//Line 4

        } 

}