ListStyle listStyle = document.getStyles().add(ListType.Numbered, "levelstyle");
listStyle.isCustomStyle(true);
ListLevelCollection levels = listStyle.getListRef().getLevels();
levels.get(0).setPatternType(ListPatternType.Arabic);
levels.get(0).setStartAt(1);
levels.get(0).getCharacterFormat().setFontName("Trebuchet MS");

paragraph.getListFormat().applyStyle(ListStyle listStyle);
paragraph.getListFormat().setListLevelNumber(int leverNumber)

or

paragraph.getListFormat().applyListRef(ListDefinitionReference list, int leverNumber);

Document document = new Document();
Section sec = document.addSection();
Paragraph paragraph = sec.addParagraph();

// Create default bullet list template
ListTemplate template = ListTemplate.Bullet_Default;
ListDefinitionReference listRef = document.getListReferences().add(template);

// Create default numbered list template
ListTemplate template1 = ListTemplate.Number_Default;
listRef = document.getListReferences().add(template1);
listRef.getLevels().get(2).setStartAt(4);// Set the third level to start at number 4

// Add paragraph and apply numbered list style (level 2)
paragraph = sec.addParagraph();
paragraph.appendText("List Item 1");
// Apply level 2 (index starts at 0; 1 means the second level)
paragraph.getListFormat().applyListRef(listRef, 1);

paragraph = sec.addParagraph();
paragraph.appendText("List Item 2");
// Apply level 3
paragraph.getListFormat().applyListRef(listRef, 2);

paragraph = sec.addParagraph();
paragraph.appendText("List Item 3");
// Apply level 2
paragraph.getListFormat().applyListRef(listRef, 1);

paragraph = sec.addParagraph();
paragraph.appendText("List Item 4");
// Apply level 3
paragraph.getListFormat().applyListRef(listRef, 2);

document.saveToFile(outputFile, FileFormat.Docx);
document.close();

Document document = new Document();
Section sec = document.addSection();
Paragraph paragraph = sec.addParagraph();
// Create Arabic numeral numbered list template (e.g., "1.", "2.", ...)
ListTemplate template = ListTemplate.Number_Arabic_Dot;
// Use addSingleLevelList to create a single-level list reference
ListDefinitionReference listRef = document.getListReferences().addSingleLevelList(template);
int levelcount = listRef.getLevels().getCount();//Check level count
boolean res=listRef.isMultiLevel();
// Add first list item
paragraph = sec.addParagraph();
paragraph.appendText("List Item 1");
paragraph.getListFormat().applyListRef(listRef, 0);
paragraph = sec.addParagraph();
paragraph.appendText("List Item 2");
paragraph.getListFormat().applyListRef(listRef, 0);

document.saveToFile(outputFile, FileFormat.Docx);
document.close();

Document document = new Document();
Section sec = document.addSection();
Paragraph paragraph = sec.addParagraph();
// Create custom bulleted list style
ListStyle listStyle = document.getStyles().add(ListType.Bulleted, "bulletList");
// Get level configurations of this list style
ListLevelCollection Levels = listStyle.getListRef().getLevels();
// Set picture bullet for level 1
Levels.get(0).createPictureBullet();
Levels.get(0).getPictureBullet().loadImage(imag_Path_1);
// Set picture bullet for level 2
Levels.get(1).createPictureBullet();
Levels.get(1).getPictureBullet().loadImage(imag_Path_2);
// Add first list item
paragraph = sec.addParagraph();
paragraph.appendText("List Item 1");
paragraph.getListFormat().applyStyle(listStyle);
// Add second list item
paragraph = sec.addParagraph();
paragraph.appendText("List Item 1.1");
paragraph.getListFormat().applyStyle(listStyle);
paragraph.getListFormat().setListLevelNumber(1);
// Delete picture bullet for level 1
Levels.get(0).deletePictureBullet();
document.saveToFile(outputFile, FileFormat.Docx);
document.close();

document.getStyles().get("style1").removeSelf();

Document doc = new Document();
Section section = doc.addSection();
TableStyle tableStyle = (TableStyle) doc.getStyles().add(StyleType.Table_Style, "TestTableStyle1");
tableStyle.setHorizontalAlignment(RowAlignment.Center);
tableStyle.getBorders().setColor(Color.BLUE);
tableStyle.getBorders().setBorderType(BorderStyle.Single);
Table table = section.addTable();
table.resetCells(1, 1);
table.getRows().get(0).getCells().get(0).addParagraph().appendText("Aligned to the center of the page");
table.setPreferredWidth(PreferredWidth.fromPoints(300));
table.applyStyle(tableStyle);
// table.getFormat().setStyle(tableStyle);
doc.saveToFile(outputDocxFile, FileFormat.Docx);

doc.copyStylesFromTemplate(inputFile_2);  // Accepts file path as String
doc.copyStylesFromTemplate(doc2);         // Accepts another Document object

// Insert an equation
sheet.getEquations().addEquation(11, 0, 100, 100, "x_{1}^{2}");

// Retrieve an equation
String mathML = sheet.getEquations().get(0).exportMathML();
String latex = sheet.getEquations().get(0).exportLaTeX();

// Update an equation
IXlsEquation equation1 = sheet.getEquations().get(0);
equation1.updateByLaTeXText("\\begin{pmatrix} \r\n  1 & 0 \\\\ \r\n  0 & 1 \r\n \\end{pmatrix} \r\n \\left(x-1\\right)\\left(x+3\\right)");

worksheet.getCellRange("A2").setFormula("=F.INV(0.99, 100, 200)");

worksheet.getCellRange("A2").setFormula("=T.INV.2T(0.05, 10)");

// Create a new PdfDocument object 'pdf1' to work with the first PDF file
        PdfDocument pdf1 = new PdfDocument();

        // Load the first PDF file from the specified path
        pdf1.loadFromFile("ComparePdfDocument_1.pdf");

        // Create a new PdfDocument object 'pdf2' to work with the second PDF file
        PdfDocument pdf2 = new PdfDocument();

        // Load the second PDF file from the specified path
        pdf2.loadFromFile("ComparePdfDocument_2.pdf");

        // Create a PdfComparer object 'compare' with 'pdf1' and 'pdf2' as parameters for comparison
        PdfComparer compare = new PdfComparer(pdf1, pdf2);

        // Set the page ranges to be compared using the options of the comparer
        compare.getOptions().setPageRanges(0, pdf1.getPages().getCount() - 1, 0, pdf2.getPages().getCount() - 1);

        String result = "output.pdf";
        File outFile = new File(result);

        // Create an output stream to write the document to the output file
        OutputStream outputStream = new FileOutputStream(outFile);

        // Compare the PDF documents and save 
        compare.compare(outputStream);

        // Dispose of system resources associated with 'pdf1'
        pdf1.dispose();

        // Dispose of system resources associated with 'pdf2'
        pdf2.dispose();

Presentation ppt = new Presentation();
ppt.loadFromFile(inputFile);
List dataList = ppt.getSlides().get(0).getShapes().get(0).getCustomerDataList();
System.out.println(dataList.size());
for(int i = 0; i < dataList.size(); i++)
{
    String name = dataList.get(i).getName();
    String content = dataList.get(i).getXML();
}

Presentation ppt = new Presentation();
ppt.loadFromFile(inputFile);
Rectangle2D.Double audioRect = new Rectangle2D.Double(220, 240, 80, 80);
IAudio audio=ppt.getSlides().get(0).getShapes().appendAudioMedia(inputFile_1, audioRect);
// Set the duration of the starting fade for 13s
audio.setFadeInDuration(13000f);
// Set the duration of the ending fade for 20s
audio.setFadeOutDuration(20000f);
ppt.saveToFile(outputFile, FileFormat.PPTX_2016);
ppt.dispose();

Presentation ppt = new Presentation();
ppt.loadFromFile(inputFile);
Rectangle2D.Double audioRect = new Rectangle2D.Double(220, 240, 80, 80);
IAudio audio=ppt.getSlides().get(0).getShapes().appendAudioMedia(inputFile_1, audioRect);
// Set the start trimming time 8 seconds
audio.setTrimFromStart(8000f);
// Set the end trimming time 13 seconds
audio.setTrimFromEnd(13000f);
ppt.saveToFile(outputFile, FileFormat.PPTX_2016);
ppt.dispose();

Presentation presentation = new Presentation();
presentation.loadFromFile("data/test.pptx");
Double[] widths = new Double[]{100d, 100d, 150d, 100d, 100d};
Double[] heights = new Double[]{15d, 15d, 15d, 15d, 15d, 15d, 15d, 15d, 15d, 15d, 15d, 15d, 15d};
// Add a table
ITable table = presentation.getSlides().get(0).getShapes().appendTable(
    (float) presentation.getSlideSize().getSize().getWidth() / 2 - 275, 90, widths, heights);
// Set overall table background transparency to 50% (0.0 = opaque, 1.0 = fully transparent)
table.getFill().setTransparency(0.5f);
// Customize the fill color of the cell at row 0, column 0 to blue
table.get(0, 0).getFillFormat().setFillType(FillFormatType.SOLID);
table.get(0, 0).getFillFormat().getSolidColor().setColor(Color.BLUE);
presentation.saveToFile("result.pptx", FileFormat.PPTX_2016);