Question

I’m currently creating a GUI in NetBeans and I have a JSpinner that contains a list of colors, but I’m not sure how to make the text the corresponding color of each one.

I.E. – Red (should be colored red, etc.)

Below is the code so far for the JSpinner:


Color_Selector_Spinner = new javax.swing.JSpinner();
Color_Selector_Spinner.setModel(new javax.swing.SpinnerListModel(new String[] { "Red", "Orange", "Yellow", "Green", "Blue", "Indigo", "Violet"}));


Answer 1

You need the following to make a color-coded JSpinner:

1. A ChangeListener for the JSpinner to update the colors when the component value changes

2. A translation of the String value into a Color.

There is only one JTextField used in the spinner so it must be updated with current color on every change event.

spinner.addChangeListener(new ChangeListener() {

   @Override
   public void stateChanged(ChangeEvent e) {

    try {
       String colorString = (String)spinner.getValue();

       Field field = Class.forName("java.awt.Color").getField(colorString.toLowerCase()); // toLowerCase because the color fields are RED or red, not Red
       Color color = (Color)field.get(null);

       JTextField tf = ((JSpinner.DefaultEditor) spinner.getEditor()).getTextField();
       tf.setForeground(color);

       } catch (Exception ex) { // handle ex }
   }
});