import java.awt.Color;
import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfShading;
import com.lowagie.text.pdf.PdfShadingPattern;
import com.lowagie.text.pdf.PdfWriter;
import com.lowagie.text.pdf.ShadingColor;
public class MainClass {
public static void main(String[] args) throws Exception {
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
document.open();
PdfContentByte cb = writer.getDirectContent();
PdfShading axial = PdfShading.simpleAxial(writer, 36, 716, 396, 788, Color.orange, Color.blue);
PdfShadingPattern axialPattern = new PdfShadingPattern(axial);
ShadingColor axialColor = new ShadingColor(axialPattern);
cb.setColorFill(axialColor);
cb.rectangle(36, 608, 72, 72);
cb.rectangle(144, 608, 72, 72);
cb.rectangle(252, 608, 72, 72);
cb.rectangle(360, 608, 72, 72);
cb.fillStroke();
document.close();
}
}