Java Swing - 如何創(chuàng)建顏色旋轉(zhuǎn)

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import java.awt.Color;
import java.awt.Dimension;
import java.lang.reflect.Field;
import javax.swing.JPanel;
import javax.swing.JSpinner;
import javax.swing.SpinnerListModel;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class Main {
  public static void main(String[] argv) throws Exception {
    ColorSpinner spinner = new ColorSpinner(new String[] { "red", "green","blue" });
   spinner.setValue("blue");
  }
}
class ColorSpinner extends JSpinner {
  public ColorSpinner(String[] colorNames) {
    super();
    setModel(new SpinnerListModel(colorNames));
    setEditor(new Editor(this));
  }
  public class Editor extends JPanel implements ChangeListener {
    int preferredWidth = 30;
    int preferredHeight = 16;
    Editor(JSpinner spinner) {
      spinner.addChangeListener(this);
      setPreferredSize(new Dimension(preferredWidth, preferredHeight));
      setColor((String) spinner.getValue());
    }
    public void stateChanged(ChangeEvent evt) {
 
 
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