connect-four/src/de/itsblue/ConnectFour/ConnectFour.java

package de.itsblue.ConnectFour;

import java.awt.Dimension;

import javax.swing.JFrame;

public class ConnectFour extends JFrame {
    /**
     *
     */
    private static final long serialVersionUID = 1L;

    ConnectFour() {
        // Constructor

		// initialize window
		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        this.setPreferredSize(new Dimension(600,600));
        
        // finish up
        this.pack();
        this.setVisible(true);
    }

    public static void main(String[] args) {
        System.out.println(new ConnectFour());
    }
}