Question

I was just goofing around with java when i thought of trying to get my work done not from a method but from a class. Check out what I did.

import javax.swing.*;

class foolingAround{
    public static void main(String ARG[]) {
        createMyInterface();
    }

    private static void createMyInterface(){
        JFrame f = new JFrame("Frame from Swing but not from other class");
        f.setSize(100,100);
        f.setVisible(true);
        new createAnotherInterface();
    }

}

class createAnotherInterface{
    public static void main(String arg[]){
        giveMe();
    }

    static JFrame giveMe(){
        JFrame p = new JFrame("Frame from Swing and from another class");
        p.setSize(100,100);
        p.setVisible(true);
        return p;
    }
}

It compiled without showing any error but the frame from class createAnotherInterface did not show up. Why? When do i make different classes and not methods?

Answer 1

You were just creating a new Object for createAnotherInterface class and by default it calls its default constructor and in that default constructor there is no call to giveMe() method.

I am not sure if i am right or wrong but i ask you to create a constructor in “createAnotherInterface” class and call the “giveMe()” method in the constuctor. i hope that will solve your problem.

or atleast call

new createAnotherInterface().giveMe();

in your createMyInterface() class