top.show();
top.setVisible(true);
    public static void main(String[] args) {        javax.swing.JFrame top = new javax.swing.JFrame("Hex Editor");        top.addWindowListener(new java.awt.event.WindowAdapter() {            public void windowClosing(java.awt.event.WindowEvent evt) {                System.exit(0);            }        });                HexPanel hp = new HexPanel();        top.getContentPane().add(hp);        top.setBounds(100,100,600,400);        try {            hp.setBytes(null, new byte[] {                0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,                0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,                0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,            });            hp.setEditable(true);            top.show();        } catch (Exception e) {            e.printStackTrace();        }    }