Swing/FocusColor のバックアップの現在との差分(No.5)

#spandel
private static class BGFocusListener implements FocusListener {
#spanend
  private final Color dColor;
  private final Color oColor;
  public BGFocusListener(Color oColor, Color dColor) {
    this.dColor = dColor;
    this.oColor = oColor;
#spanadd
class BGFocusListener implements FocusListener {
#spanend
  private final Color color;
  protected BGFocusListener(Color color) {
    this.color = color;
  }
  @Override public void focusGained(final FocusEvent e) {
    ((JTextField)e.getSource()).setBackground(dColor);
#spanadd

#spanend
  @Override public void focusGained(FocusEvent e) {
    e.getComponent().setBackground(color);
  }
  @Override public void focusLost(final FocusEvent e) {
    ((JTextField)e.getSource()).setBackground(oColor);
#spanadd

#spanend
  @Override public void focusLost(FocusEvent e) {
    e.getComponent().setBackground(UIManager.getColor("TextField.background"));
  }
}