Customize header of Table of Content - apache-poi

Question

Good morning
I try to add a Table of Content to my doc generated with apache-poi.
I followed this solution
Code url
and it works great.
I have only a problem. By default the header of the TOC is "Table of Content" as you can see from the following image
TOC HEADER IMAGE
I would like to change it with another text. Is it possible?
Thanks
Regards

Answer 1

Good morning
Thanks to Axel Richter advice this is the correct code that generate index without the automatic title Table of Content.
I rewrote the code with custom title of TOC
public class App {
public static void main(String[] args) throws Exception {
XWPFDocument doc= new XWPFDocument();
addCustomHeadingStyle(doc, "heading 1", 1);
addCustomHeadingStyle(doc, "heading 2", 2);
// the body content
XWPFParagraph paragraph = doc.createParagraph();
XWPFRun run=paragraph.createRun();
// set custom title of TOC
run.setBold(true);
run.setFontSize(30);
run.setText("INDEX"); //or whatever other text
CTP ctP = paragraph.getCTP();
CTSimpleField toc = ctP.addNewFldSimple();
toc.setInstr("TOC \\h");
toc.setDirty(STOnOff.TRUE);
run.setText("The Body:");
paragraph = doc.createParagraph();
run=paragraph.createRun();
run.setText("Lorem ipsum");
paragraph.setStyle("heading 1");
paragraph = doc.createParagraph();
run=paragraph.createRun();
run.addBreak(BreakType.PAGE);
run.setText("Lorem ipsum");
paragraph.setStyle("heading 2");
paragraph = doc.createParagraph();
run=paragraph.createRun();
run.addBreak(BreakType.PAGE);
run.setText("Lorem ipsum");
FileOutputStream fos = new FileOutputStream("D:\\toc.docx");
doc.write(fos);
}
private static void addCustomHeadingStyle(XWPFDocument docxDocument, String strStyleId, int headingLevel) {
CTStyle ctStyle = CTStyle.Factory.newInstance();
ctStyle.setStyleId(strStyleId);
CTString styleName = CTString.Factory.newInstance();
styleName.setVal(strStyleId);
ctStyle.setName(styleName);
CTDecimalNumber indentNumber = CTDecimalNumber.Factory.newInstance();
indentNumber.setVal(BigInteger.valueOf(headingLevel));
// lower number > style is more prominent in the formats bar
ctStyle.setUiPriority(indentNumber);
CTOnOff onoffnull = CTOnOff.Factory.newInstance();
ctStyle.setUnhideWhenUsed(onoffnull);
// style shows up in the formats bar
ctStyle.setQFormat(onoffnull);
// style defines a heading of the given level
CTPPr ppr = CTPPr.Factory.newInstance();
ppr.setOutlineLvl(indentNumber);
ctStyle.setPPr(ppr);
XWPFStyle style = new XWPFStyle(ctStyle);
// is a null op if already defined
XWPFStyles styles = docxDocument.createStyles();
style.setType(STStyleType.PARAGRAPH);
styles.addStyle(style);
}
}