Java set the page size and page orientation for Word

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

public class WordPageSetup {
    public static void main(String[] args) throws Exception {
        //Load the sample document
        Document doc= new Document();
        doc.loadFromFile("Sample.docx");
        //Get the first section
        Section section = doc.getSections().get(0);
        //Set the page size
        section.getPageSetup().setPageSize(PageSize.A3);
        //Set the page orientation
        section.getPageSetup().setOrientation(PageOrientation.Landscape);
        //Save the document to file
        doc.saveToFile("Result.docx",FileFormat.Docx_2013);
    }
}