JButton, with icon
URL url = getClass().getResource("images/close-4x4.png"); Button myButton = new JButton(new ImageIcon(url)); // Oder: // myButton.setIcon(new ImageIcon(url));
URL url = getClass().getResource("images/close-4x4.png"); Button myButton = new JButton(new ImageIcon(url)); // Oder: // myButton.setIcon(new ImageIcon(url));