how can I let the JButton “update price” become grey like thesecond picture
b.add (new JLabel (“ISBN:”)); b.add (new JTextField (20)); b.add (new JLabel (“Author Name:”)) b.add (new JTextField (20)) b.add (new JLabel (“Publisher: “)); b.add (new JTextField (20)); b.add (new JLabel (“Price:”)); b.add (new JTextField (20)) b.add (new JLabel (“Inventory Level: “)); b.add (new JTextField (20))2 container.add (b, BorderLayout. CENTER)
OR
PayPal Gateway not configured
OR
PayPal Gateway not configured