Program: 47137
Project: 47137
Buggy source:
public static void initializeLookAndFeel(){
synchronized (lookAndFeelInitialized) {
    if (lookAndFeelInitialized.booleanValue()) {
      return;
    }
  }
  LookAndFeel selectedLaf=null;
  if (Platform.isWindows()) {
    selectedLaf=new WindowsLookAndFeel();
  }
 else   if (System.getProperty("String_Node_Str") == null && !Platform.isMac()) {
    selectedLaf=new PlasticLookAndFeel();
  }
 else {
    try {
      String systemClassName=UIManager.getSystemLookAndFeelClassName();
      try {
        String gtkLAF="String_Node_Str";
        Class.forName(gtkLAF);
        if (systemClassName.equals("String_Node_Str")) {
          systemClassName=gtkLAF;
        }
      }
 catch (      ClassNotFoundException ce) {
        LOGGER.error("String_Node_Str",ce);
      }
      LOGGER.trace("String_Node_Str" + systemClassName);
      UIManager.setLookAndFeel(systemClassName);
    }
 catch (    ClassNotFoundException|InstantiationException|IllegalAccessException|UnsupportedLookAndFeelException e1) {
      selectedLaf=new PlasticLookAndFeel();
      LOGGER.error("String_Node_Str",e1);
    }
  }
  if (selectedLaf instanceof PlasticLookAndFeel) {
    PlasticLookAndFeel.setPlasticTheme(PlasticLookAndFeel.createMyDefaultTheme());
    PlasticLookAndFeel.setTabStyle(PlasticLookAndFeel.TAB_STYLE_DEFAULT_VALUE);
    PlasticLookAndFeel.setHighContrastFocusColorsEnabled(false);
  }
 else   if (selectedLaf != null && selectedLaf.getClass() == MetalLookAndFeel.class) {
    MetalLookAndFeel.setCurrentTheme(new DefaultMetalTheme());
  }
  JRadioButton radio=new JRadioButton();
  radio.getUI().uninstallUI(radio);
  JCheckBox checkBox=new JCheckBox();
  checkBox.getUI().uninstallUI(checkBox);
synchronized (lookAndFeelInitialized) {
    if (selectedLaf != null) {
      try {
        UIManager.setLookAndFeel(selectedLaf);
      }
 catch (      UnsupportedLookAndFeelException e) {
        LOGGER.warn("String_Node_Str",e);
      }
    }
    lookAndFeelInitialized=Boolean.valueOf(true);
  }
}

Fixed version (ground truth):
public static void initializeLookAndFeel(){
synchronized (lookAndFeelInitializedLock) {
    if (lookAndFeelInitialized) {
      return;
    }
    LookAndFeel selectedLaf=null;
    if (Platform.isWindows()) {
      selectedLaf=new WindowsLookAndFeel();
    }
 else     if (System.getProperty("String_Node_Str") == null && !Platform.isMac()) {
      selectedLaf=new PlasticLookAndFeel();
    }
 else {
      try {
        String systemClassName=UIManager.getSystemLookAndFeelClassName();
        try {
          String gtkLAF="String_Node_Str";
          Class.forName(gtkLAF);
          if (systemClassName.equals("String_Node_Str")) {
            systemClassName=gtkLAF;
          }
        }
 catch (        ClassNotFoundException ce) {
          LOGGER.error("String_Node_Str",ce);
        }
        LOGGER.trace("String_Node_Str" + systemClassName);
        UIManager.setLookAndFeel(systemClassName);
      }
 catch (      ClassNotFoundException|InstantiationException|IllegalAccessException|UnsupportedLookAndFeelException e1) {
        selectedLaf=new PlasticLookAndFeel();
        LOGGER.error("String_Node_Str",e1);
      }
    }
    if (selectedLaf instanceof PlasticLookAndFeel) {
      PlasticLookAndFeel.setPlasticTheme(PlasticLookAndFeel.createMyDefaultTheme());
      PlasticLookAndFeel.setTabStyle(PlasticLookAndFeel.TAB_STYLE_DEFAULT_VALUE);
      PlasticLookAndFeel.setHighContrastFocusColorsEnabled(false);
    }
 else     if (selectedLaf != null && selectedLaf.getClass() == MetalLookAndFeel.class) {
      MetalLookAndFeel.setCurrentTheme(new DefaultMetalTheme());
    }
    JRadioButton radio=new JRadioButton();
    radio.getUI().uninstallUI(radio);
    JCheckBox checkBox=new JCheckBox();
    checkBox.getUI().uninstallUI(checkBox);
    if (selectedLaf != null) {
      try {
        UIManager.setLookAndFeel(selectedLaf);
      }
 catch (      UnsupportedLookAndFeelException e) {
        LOGGER.warn("String_Node_Str",e);
      }
    }
    lookAndFeelInitialized=true;
  }
}