NimbusLookAndFeelでJTabbedPaneのタブテキストとアイコンの水平方向の配置方法を変更する

// UIManager.put("TabbedPane.textIconGap", 4);
JTabbedPane tabbedPane0 = new JTabbedPane() {
  @Override public void updateUI() {
    super.updateUI();
    System.out.println(UIManager.getInt("TabbedPane.textIconGap"));
    // UIDefaults d = new UIDefaults();
    // d.put("TabbedPane.textIconGap", 4);
    // putClientProperty("Nimbus.Overrides", d);
    // putClientProperty("Nimbus.Overrides.InheritDefaults", true);
  }
};
add(makeTitledPanel("Default addTab(title, icon, c)", initTabbedPane(tabbedPane0)));

JTabbedPane tabbedPane1 = new JTabbedPane() {
  @Override public void insertTab(
      String title, Icon icon, c component, String tip, int index) {
    super.insertTab(title, icon, c, tip, index);
    JLabel label = new JLabel(title, icon, SwingConstants.LEADING);
    setTabComponentAt(getTabCount() - 1, label);
  }
};
add(makeTitledPanel("TabComponent + JLabel + LEADING", initTabbedPane(tabbedPane1)));