Java Programing laungage

package r4r;
import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.PageSize;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.PdfWriter;

public class pagetypetest 
	{
public static void main(String arg[])throws Exception
	{
Document doc = new Document(PageSize.A4.rotate());
PdfWriter.getInstance(doc,new 
FileOutputStream("pagetypetest.pdf"));
doc.open();
doc.add(new Paragraph("landscape format"));
doc.setPageSize(PageSize.A4);
doc.newPage();
doc.add(new Paragraph("portrait format"));
doc.close();
}
}