Grouped layers : Layer « PDF « Java Tutorial

1. Java Tutorial
2. PDF
3. Layer

import java.io.FileOutputStream;
import java.util.ArrayList;

import com.lowagie.text.Document;
import com.lowagie.text.Element;
import com.lowagie.text.Phrase;
import com.lowagie.text.pdf.ColumnText;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfLayer;
import com.lowagie.text.pdf.PdfWriter;

public class MainClass {
  public static void main(String[] args) throws Exception {
    Document document = new Document();
    PdfWriter writer = PdfWriter
        .getInstance(document, new FileOutputStream("2.pdf"));
    writer.setPdfVersion(PdfWriter.VERSION_1_5);

    document.open();

    PdfContentByte cb = writer.getDirectContent();

    PdfLayer group = PdfLayer.createTitle("Grouped layers", writer);
    PdfLayer layer1 = new PdfLayer("Group: layer 1", writer);
    PdfLayer layer2 = new PdfLayer("Group: layer 2", writer);
    group.addChild(layer1);
    group.addChild(layer2);
    cb.beginLayer(layer1);
    ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("layer 1 in the group"), 50, 700,
        0);
    cb.endLayer();
    cb.beginLayer(layer2);
    ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, new Phrase("layer 2 in the group"), 50, 675,
        0);
    cb.endLayer();
    
    document.close();
  }
}