Window With Color

// add some color to your window!
  public static void colorfulWindow() {
    JFrame myWindow = new JFrame();
    myWindow.setTitle("Even prettier");
    myWindow.setSize(300, 200);
    myWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JPanel panel = new JPanel();
    panel.setBackground(Color.magenta);
    Container pane = myWindow.getContentPane();
    pane.add(panel);
    myWindow.setVisible(true);
  }