JFrame

package test;

import javax.swing.JFrame;

public class Shotter extends JFrame {

    public Shotter() {
        setSize(600, 400);
        setTitle("Game Shotter 2D ");
        setResizable(false);
        setVisible(true);
//        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        Shotter shotter = new Shotter();
    }
}