Program: 8407
Project: 8407
Buggy source:
static public void initStyles(HSSFWorkbook wb){
  wb1=wb;
  setHeadingStyle(createCustomStyle(createCustomFont(HSSFColor.LEMON_CHIFFON.index,HSSFFont.U_NONE),HSSFCellStyle.ALIGN_CENTER));
  getHeadingStyle().setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
  getHeadingStyle().setFillForegroundColor(new HSSFColor.BLUE_GREY().getIndex());
  setHeadingStyle(setAllBorders(HSSFCellStyle.BORDER_DOUBLE,getHeadingStyle()));
  subHeading1Style=createCustomStyle(createCustomFont(HSSFColor.LIGHT_BLUE.index,HSSFFont.U_NONE));
  subHeading1Style=setAllBorders(HSSFCellStyle.BORDER_THIN,subHeading1Style);
  setSubHeading2Style(createCustomStyle(createCustomFont(HSSFColor.BROWN.index,HSSFFont.U_NONE),HSSFCellStyle.ALIGN_CENTER));
  setSubHeading2Style(setAllBorders(HSSFCellStyle.BORDER_MEDIUM,getSubHeading2Style()));
  setSubHeading2StyleThinBorder(createCustomStyle(createCustomFont(HSSFColor.BROWN.index,HSSFFont.U_NONE),HSSFCellStyle.ALIGN_LEFT));
  setSubHeading2StyleThinBorder(setAllBorders(HSSFCellStyle.BORDER_THIN,getSubHeading2StyleThinBorder()));
  setThinBorderStyle(wb.createCellStyle());
  setThinBorderStyle(setAllBorders(HSSFCellStyle.BORDER_THIN,getThinBorderStyle()));
  setStyleBorderThinCenter(wb.createCellStyle());
  setStyleBorderThinCenter(setAllBorders(HSSFCellStyle.BORDER_THIN,getStyleBorderThinCenter()));
  getStyleBorderThinCenter().setAlignment(HSSFCellStyle.ALIGN_CENTER);
  setStyleBorderThinLeftTop(wb.createCellStyle());
  setStyleBorderThinLeftTop(setAllBorders(HSSFCellStyle.BORDER_THIN,getStyleBorderThinLeftTop()));
  getStyleBorderThinLeftTop().setAlignment(HSSFCellStyle.ALIGN_LEFT);
  getStyleBorderThinLeftTop().setVerticalAlignment(HSSFCellStyle.VERTICAL_TOP);
  setHyperLinkStyle(wb.createCellStyle());
  setHyperLinkStyle(setAllBorders(HSSFCellStyle.BORDER_THIN,getHyperLinkStyle()));
  HSSFFont hyperLinkFont=createCustomFont(HSSFColor.BLUE.index,HSSFFont.U_SINGLE);
  hyperLinkFont.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
  getHyperLinkStyle().setFont(hyperLinkFont);
}

Fixed version (ground truth):
public static void initStyles(HSSFWorkbook wb){
  wb1=wb;
  setHeadingStyle(createCustomStyle(createCustomFont(HSSFColor.LEMON_CHIFFON.index,HSSFFont.U_NONE),HSSFCellStyle.ALIGN_CENTER));
  getHeadingStyle().setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
  getHeadingStyle().setFillForegroundColor(new HSSFColor.BLUE_GREY().getIndex());
  setHeadingStyle(setAllBorders(HSSFCellStyle.BORDER_DOUBLE,getHeadingStyle()));
  subHeading1Style=createCustomStyle(createCustomFont(HSSFColor.LIGHT_BLUE.index,HSSFFont.U_NONE));
  subHeading1Style=setAllBorders(HSSFCellStyle.BORDER_THIN,subHeading1Style);
  setSubHeading2Style(createCustomStyle(createCustomFont(HSSFColor.BROWN.index,HSSFFont.U_NONE),HSSFCellStyle.ALIGN_CENTER));
  setSubHeading2Style(setAllBorders(HSSFCellStyle.BORDER_MEDIUM,getSubHeading2Style()));
  setSubHeading2StyleThinBorder(createCustomStyle(createCustomFont(HSSFColor.BROWN.index,HSSFFont.U_NONE),HSSFCellStyle.ALIGN_LEFT));
  setSubHeading2StyleThinBorder(setAllBorders(HSSFCellStyle.BORDER_THIN,getSubHeading2StyleThinBorder()));
  setThinBorderStyle(wb.createCellStyle());
  setThinBorderStyle(setAllBorders(HSSFCellStyle.BORDER_THIN,getThinBorderStyle()));
  setStyleBorderThinCenter(wb.createCellStyle());
  setStyleBorderThinCenter(setAllBorders(HSSFCellStyle.BORDER_THIN,getStyleBorderThinCenter()));
  getStyleBorderThinCenter().setAlignment(HSSFCellStyle.ALIGN_CENTER);
  setStyleBorderThinLeftTop(wb.createCellStyle());
  setStyleBorderThinLeftTop(setAllBorders(HSSFCellStyle.BORDER_THIN,getStyleBorderThinLeftTop()));
  getStyleBorderThinLeftTop().setAlignment(HSSFCellStyle.ALIGN_LEFT);
  getStyleBorderThinLeftTop().setVerticalAlignment(HSSFCellStyle.VERTICAL_TOP);
  setHyperLinkStyle(wb.createCellStyle());
  setHyperLinkStyle(setAllBorders(HSSFCellStyle.BORDER_THIN,getHyperLinkStyle()));
  HSSFFont hyperLinkFont=createCustomFont(HSSFColor.BLUE.index,HSSFFont.U_SINGLE);
  hyperLinkFont.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
  getHyperLinkStyle().setFont(hyperLinkFont);
}