public class SynchronizedRGB {

  //Values must be between 0 and 255.
  private int red;
  private int green;
  private int blue;
  private String name;

  private void check(int red, int green, int blue) {
    if (red < 0 || red > 255
        || green < 0 || green > 255
        || blue < 0 || blue > 255) {
      throw new IllegalArgumentException();
    }
  }

  public SynchronizedRGB(int red, int green, int blue, String name) {
    check(red, green, blue);
    this.red = red;
    this.green = green;
    this.blue = blue;
    this.name = name;
  }

  public void set(int red, int green, int blue, String name) {
    check(red, green, blue);
    synchronized (this) {
      this.red = red;
      this.green = green;
      this.blue = blue;
      this.name = name;
    }
  }

  public synchronized int getRGB() {
    return ((red << 16) | (green << 8) | blue);
  }

  public synchronized String getName() {
    return name;
  }

  public synchronized void invert() {
    red = 255 - red;
    green = 255 - green;
    blue = 255 - blue;
    name = "Inverse of " + name;
  }
}