import com.spire.doc.*;
import com.spire.doc.documents.*;
import com.spire.doc.fields.Field;

import java.util.ArrayList;
import java.util.List;

public class ModifyHyperlink {
    public static void main(String[] args) {
        //Load Word document
        Document doc = new Document();
        doc.loadFromFile("Hyperlink.docx");

       ⁢List⁢<Field> hyperlinks = new ArrayList<>();

        //Loop through the section in the document
        for (Section section : (Iterable<Section>) doc.getSections()
                ) {
            //Loop through the section in the document
            for (Paragraph para : (Iterable<Paragraph>) section.getParagraphs()
                    ) {
                for (DocumentObject obj:(Iterable<DocumentObject>) para.getChildObjects()
                     ) {
                    if (obj.getDocumentObjectType().equals(DocumentObjectType.Field)) {
                        Field field = (Field) obj;
                        if (field.getType().equals(FieldType.Field_Hyperlink)) {
                            hyperlinks.add(field);
                        }
                    }
                }
            }
        }

        hyperlinks.get(0).setCode("HYPERLINK \"http://www.google.com\"");
        hyperlinks.get(0).setFieldText("www.google.com");

        doc.saveToFile("EditHyperlink.docx", FileFormat.Docx_2013);
    }
}

import com.spire.doc.*;
import com.spire.doc.documents.Paragraph;
import com.spire.doc.fields.*;

public class RemoveFootnote {
    public static void main(String[] args) throws Exception {

        //Load the Sample Word document.
        Document document = new Document();
        document.loadFromFile("Sample.docx");

        Section section = document.getSections().get(0);

        //Traverse paragraphs in the section and find the footnote
        for (int j = 0; j < section.getParagraphs().getCount(); j++) {
            Paragraph para = section.getParagraphs().get(j);
            int index = -1;
            for (int i = 0, cnt = para.getChildObjects().getCount(); i < cnt; i++) {
                ParagraphBase pBase = (ParagraphBase) para.getChildObjects().get(i);
                if (pBase instanceof Footnote) {
                    index = i;
                    break;
                }
            }

            if (index > -1)
                //remove the footnote
                para.getChildObjects().removeAt(index);
        }
        document.saveToFile("Removefootnote.docx", FileFormat.Docx);
    }
}

import com.spire.presentation.FileFormat;
import com.spire.presentation.Presentation;
import com.spire.presentation.SlideBackground;
import com.spire.presentation.drawing.*;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.FileInputStream;

public class AppplyBgToAllSlides {

    public static void main(String[] args) throws Exception {

        //load a PowerPoint file
        Presentation presentation = new Presentation();
        presentation.loadFromFile("C:\\Users\\Administrator\\Desktop\\input.pptx");

        //get the image data
        BufferedImage bufferedImage = ImageIO.read(new FileInputStream("C:\\Users\\Administrator\\Desktop\\bg.jpg"));
        IImageData imageData = presentation.getImages().append(bufferedImage);

        //loop through the slides
        for (int i = 0; i < presentation.getSlides().getCount() ; i++) {

            //apply the image to the specific slide as background
            SlideBackground background = presentation.getSlides().get(i).getSlideBackground();
            background.setType(BackgroundType.CUSTOM);
            background.getFill().setFillType(FillFormatType.PICTURE);
            background.getFill().getPictureFill().setFillType(PictureFillType.STRETCH);
            background.getFill().getPictureFill().getPicture().setEmbedImage(imageData);
        }

        //save the file
        presentation.saveToFile("output/BackgroundImage.pptx", FileFormat.PPTX_2013);
        presentation.dispose();
    }
}