Dynamically change jButton icon

Question

I have a program that detects when certain machines are online and creates a button with a green \"online\" icon to show this. I want to add the functionality to check perio

Answer 1

You should be able to do so using AbstractButton.setIcon(). It may require you to call invalidate() on the button to get the change displayed.

changeButton = new JButton(icon1);
changeButton.addActionListener(
    new ActionListener( )
    {
        private boolean flag = true;

        @Override
        public void actionPerformed( ActionEvent arg0 )
        {
            changeButton.setIcon( flag ? icon2 : icon1 );
            flag = !flag;
        }
    }
);
add(changeButton);