Java set background image and background color for word document

import com.spire.doc.*;
import com.spire.doc.documents.BackgroundType;
import java.awt.*;
import java.io.*;

public class WordBackground {
    public static void main(String[] args) throws IOException {

        String inputFile="Sample.docx";
        String backgroundImg="background.png";
        String outputFile="out/result.docx";

        //load a word document
        Document document= new Document(inputFile);

        //set the background type as picture
        document.getBackground().setType(BackgroundType.Picture);

        //set the background picture
        document.getBackground().setPicture(backgroundImg);

        //save the file
        document.saveToFile(outputFile, FileFormat.Docx);
    }
}

import com.spire.doc.*;
import com.spire.doc.documents.BackgroundType;
import java.awt.*;
import java.io.*;

public class WordBackground {
    public static void main(String[] args) throws IOException {

        String inputFile="Sample.docx";
        String outputFile="out/result2.docx";

        //load a word document
        Document document= new Document(inputFile);

        document.getBackground().setType(BackgroundType.Color);
        document.getBackground().setColor(Color.lightGray);

        //save the file
        document.saveToFile(outputFile, FileFormat.Docx);
    }
}

import com.spire.doc.*;
import com.spire.doc.documents.BackgroundType;
import com.spire.doc.documents.GradientShadingStyle;
import com.spire.doc.documents.GradientShadingVariant;
import java.awt.*;
import java.io.*;

public class WordBackground {
    public static void main(String[] args) throws IOException {

        String inputFile="Sample.docx";
        String outputFile="out/result3.docx";

        //load a word document
        Document document= new Document(inputFile);

        document.getBackground().setType(BackgroundType.Gradient);
        document.getBackground().getGradient().setColor1(Color.white);
        document.getBackground().getGradient().setColor2(Color.green);
        document.getBackground().getGradient().setShadingVariant(GradientShadingVariant.Shading_Down);
        document.getBackground().getGradient().setShadingStyle(GradientShadingStyle.Horizontal);

        //save the file
        document.saveToFile(outputFile, FileFormat.Docx_2013);
    }
}