JSpinnerの矢印ボタンによる増減方向を入れ替える

JSpinner spinner0 = new JSpinner(new SpinnerNumberModel(5, 0, 10, 1));

JSpinner spinner1 = new JSpinner(new SpinnerNumberModel(5, 0, 10, -1));

String[] scale = {
  "AAA", "AA+", "AA", "AA-", "A+", "A", "A-",
  "BBB+", "BBB", "BBB-", "BB+", "BB", "BB-", "B+", "B", "B-",
  "CCC+", "CCC", "CCC-", "CC", "R", "D"
};
JSpinner spinner2 = new JSpinner(new SpinnerListModel(scale));

JSpinner spinner3 = new JSpinner(new SpinnerListModel(scale) {
  @Override public Object getNextValue() {
    return super.getPreviousValue();
  }

  @Override public Object getPreviousValue() {
    return super.getNextValue();
  }
});