import com.spire.pdf.PdfDocument;
import com.spire.pdf.PdfPageBase;
import com.spire.pdf.graphics.PdfMargins;
import com.spire.pdf.graphics.PdfTemplate;

import java.awt.geom.Dimension2D;
import java.awt.geom.Point2D;

public class DuplicatePage {

    public static void main(String[] args) {

        //Load a sample PDF document
        PdfDocument pdf = new PdfDocument("C:\\Users\\Administrator\\Desktop\\original.pdf");

        //Get the first page
        PdfPageBase page = pdf.getPages().get(0);

        //Get the page size
        Dimension2D size = page.getActualSize();

        //Create a template based on the page
        PdfTemplate template = page.createTemplate();

        for (int i = 0; i < 10; i++) {

            //Add a new page to the document
            page = pdf.getPages().add(size, new PdfMargins(0));

            //Draw template on the new page
            page.getCanvas().drawTemplate(template, new Point2D.Float(0, 0));
        }

        //Save the file
        pdf.saveToFile("output/DuplicatePage.pdf");
    }
}

import com.spire.doc.Document;
import com.spire.doc.FileFormat;
import com.spire.doc.documents.TextSelection;
import com.spire.doc.fields.DocPicture;
import com.spire.doc.fields.TextRange;

public class ReplaceTextWithImage {

    public static void main(String[] args) {

        //Load a sample Word file
        Document document = new Document();
        document.loadFromFile("C:\\Users\\Administrator\\Desktop\\input.docx");

        //Find the string 'E-iceblue' in the document
        TextSelection[] selections = document.findAllString("E-iceblue", true, true);

        //Replace the string with an image
        int index = 0;
        TextRange range = null;
        for (Object obj : selections) {

            TextSelection textSelection = (TextSelection)obj;
            DocPicture pic = new DocPicture(document);
            pic.loadImage("C:\\Users\\Administrator\\Desktop\\e-iceblue-logo.png");
            range = textSelection.getAsOneRange();
            index = range.getOwnerParagraph().getChildObjects().indexOf(range);
            range.getOwnerParagraph().getChildObjects().insert(index,pic);
            range.getOwnerParagraph().getChildObjects().remove(range);
        }

        //Save the document
        document.saveToFile("output/ReplaceTextWithImage.docx", FileFormat.Docx_2013);
    }
}

import com.spire.presentation.FileFormat;
import com.spire.presentation.ISlide;
import com.spire.presentation.Presentation;
import com.spire.presentation.charts.IChart;
import com.spire.presentation.charts.ITrendlines;
import com.spire.presentation.charts.TrendlineSimpleType;

public class AddTrendlineToChart {
    public static void main(String[] args) throws Exception {
        //create a Presentation instance
        Presentation ppt = new Presentation();
        //load the PowerPoint document
        ppt.loadFromFile("Chart.pptx");

        //get the first slide
        ISlide slide = ppt.getSlides().get(0);
        //get the chart on the slide
        IChart chart = (IChart)slide.getShapes().get(0);

        //add a linear trendline to the first series of the chart
        ITrendlines trendLine = chart.getSeries().get(0).addTrendLine(TrendlineSimpleType.LINEAR);
        //display equation
        trendLine.setdisplayEquation(true);

        //save the resultant document
        ppt.saveToFile("AddTrendline.pptx", FileFormat.PPTX_2013);
    }
}