Could this be done better

Cecil Westerhof <>
Mon, 24 Nov 2014 12:16:42 +0100
I have mostly programmed back-ends. But I now want also to do some
front-end programming.

I wrote the following simple program. It does nothing useful, it just
displays a description in different colours with the colour appended
to the description.

I was just wondering if this could be done better. Especially
???updateColour???. First I did not removed the text, but then I could see
the colour changing before the text was changed. This way I find more
pleasing and I do not notice that the text disappears.

    import java.awt.*;
    import java.util.*;

    import javax.swing.*;

    public class ColourCycling extends JFrame {
        // public functions
        public ColourCycling() {
            java.util.Timer colourTimer = new java.util.Timer();

            setLayout(new GridBagLayout());
            label.setFont(new Font("serif", Font.BOLD, 25));
            setSize(getWidth(), 3 * getHeight());
            colourTimer.schedule(new SwitchColour(), delay, delay);

        public static void main(String[] args) {
            new ColourCycling();

        // private classes
        private class Colour {
            // public
            public Colour(Color color, String description) {
                this.color = color;
                this.description = description;

            public Color getColor() {
                return color;

            public String getDescription() {
                return description;

            // private
            private Color color;
            private String description;

        private class SwitchColour extends TimerTask {
            public void run() {

        //private functions
        private Colour getCurrentColour() {
            return colours[currentColour];

        private Colour getNextColour() {
            currentColour = (currentColour + 1) % colours.length;
            return getCurrentColour();

        private void updateColour(Colour newColour) {
            label.setText(description + " : " + newColour.getDescription());

        // private variables
        private Color background = Color.lightGray;
        private Colour[] colours = new Colour[] {
            new Colour(, "Blue"),
            new Colour(, "Red"),
            new Colour(, "Orange"),
            new Colour(Color.yellow, "Yellow"),
            new Colour(, "Green"),
            new Colour(Color.cyan, "Cyan"),
            new Colour(Color.magenta, "Magenta"),
            new Colour(new Color(0x9C, 0x5D, 0x52), "Brown"),
        private int currentColour = 0;
        private int delay = 4000;
        private String description = "JTextArea Color Change Example";
        private JLabel label = new JLabel(description + " : " + "XXXXXXXXXXXXXXX");


Cecil Westerhof
Senior Software Engineer

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