Basic JFrame

    // Fel486

    import javax.swing.JFrame; // Importing JFrame

    public static JFrame janela = new JFrame("");

    public static final int WIDTH = 500;
    public static final int HEIGHT = 500;

    public static void main(String[] args)
    {
        janela.setSize(WIDTH, HEIGHT);
        janela.setVisible(true);
        janela.setResizable(false);
        janela.setLocationRelativeTo(null);
        janela.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


    }