Java Tutorial/PDF/Line

Add shape to an existing Pdf document

import java.io.FileOutputStream;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfStamper;
public class MainClass {
  public static void main(String[] args) throws Exception {
    PdfReader reader = new PdfReader("HelloWorldRead.pdf");
    PdfStamper stamper = new PdfStamper(reader, new FileOutputStream("HelloWorldStamper2.pdf"));
    
    int total = reader.getNumberOfPages() + 1;
    for (int i = 1; i < total; i++) {
      stamper.setRotateContents(false);
      PdfContentByte over = stamper.getOverContent(i);
      over.setRGBColorStroke(0xFF, 0x00, 0x00);
      over.setLineWidth(5f);
      over.ellipse(250, 450, 350, 550);
      over.stroke();
      
    }
    stamper.close();
  }
}

Line Dash

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document.rupress = false;
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
    document.open();
    PdfContentByte cb = writer.getDirectContent();
    cb.saveState();
    cb.setLineWidth(3);
    cb.moveTo(40, 480);
    cb.lineTo(320, 480);
    cb.stroke();
    cb.setLineDash(6, 0);
    cb.moveTo(40, 450);
    cb.lineTo(320, 450);
    cb.stroke();
    float[] dash1 = { 10, 5, 5, 5, 20 };
    cb.setLineDash(dash1, 5);
    cb.moveTo(40, 440);
    cb.lineTo(320, 440);
    cb.stroke();
    float[] dash2 = { 9, 6, 0, 6 };
    cb.setLineCap(PdfContentByte.LINE_CAP_ROUND);
    cb.setLineDash(dash2, 0);
    cb.moveTo(40, 430);
    cb.lineTo(320, 430);
    cb.stroke();

    cb.restoreState();
    document.close();
  }
}

Miter Limit

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document.rupress = false;
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
    document.open();
    PdfContentByte cb = writer.getDirectContent();
    cb.saveState();
    cb.setLineWidth(8);
    cb.setLineJoin(PdfContentByte.LINE_JOIN_MITER);
    cb.setMiterLimit(2);
    cb.moveTo(75, 560);
    cb.lineTo(95, 590);
    cb.lineTo(115, 560);
    cb.stroke();
    cb.restoreState();
    cb.saveState();
    cb.setLineWidth(8);
    cb.setLineJoin(PdfContentByte.LINE_JOIN_MITER);
    cb.setMiterLimit(2.1f);
    cb.moveTo(280, 500);
    cb.lineTo(295, 530);
    cb.lineTo(310, 500);
    cb.stroke();
    cb.restoreState();
    document.close();
  }
}

Paint line

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.PageSize;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document document = new Document(PageSize.A4);
    PdfReader reader = new PdfReader("1.pdf");
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("my.pdf"));
    document.open();
    PdfContentByte cb = writer.getDirectContent();
    PdfImportedPage page = writer.getImportedPage(reader, 1);
    cb.addTemplate(page, -0.5f, 0f, 0f, -0.5f, PageSize.A4.width() / 2, PageSize.A4.height());
    cb.setLineDash(20, 10, 10);
    cb.moveTo(0, PageSize.A4.height() / 2f);
    cb.lineTo(PageSize.A4.width(), PageSize.A4.height() / 2f);
    cb.stroke();
    cb.moveTo(PageSize.A4.width() / 2f, 0);
    cb.lineTo(PageSize.A4.width() / 2f, PageSize.A4.height());
    cb.stroke();
    document.close();
  }
}

PdfContentByte.LINE_CAP_BUTT

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document.rupress = false;
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
    document.open();
    PdfContentByte cb = writer.getDirectContent();
    cb.saveState();
    cb.setLineWidth(8);
    cb.setLineCap(PdfContentByte.LINE_CAP_BUTT);
    cb.moveTo(72, 640);
    cb.lineTo(144, 640);
    cb.stroke();
    cb.restoreState();
    document.close();
  }
}

PdfContentByte.LINE_CAP_PROJECTING_SQUARE

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document.rupress = false;
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
    document.open();
    PdfContentByte cb = writer.getDirectContent();
    cb.saveState();
    cb.setLineWidth(8);
    cb.setLineCap(PdfContentByte.LINE_CAP_PROJECTING_SQUARE);
    cb.moveTo(72, 640);
    cb.lineTo(144, 640);
    cb.stroke();
    cb.restoreState();
    document.close();
  }
}

PdfContentByte.LINE_CAP_ROUND

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document.rupress = false;
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
    document.open();
    PdfContentByte cb = writer.getDirectContent();
    cb.saveState();
    cb.setLineWidth(8);
    cb.setLineCap(PdfContentByte.LINE_CAP_ROUND);
    cb.moveTo(72, 640);
    cb.lineTo(144, 640);
    cb.stroke();
    cb.restoreState();
    document.close();
  }
}

PdfContentByte.LINE_JOIN_MITER

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document.rupress = false;
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
    document.open();
    PdfContentByte cb = writer.getDirectContent();
    cb.saveState();
    cb.setLineWidth(8);
    cb.setLineCap(PdfContentByte.LINE_JOIN_MITER);
    cb.moveTo(72, 640);
    cb.lineTo(144, 640);
    cb.stroke();
    cb.restoreState();
    document.close();
  }
}

set LineCap

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.PageSize;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfTemplate;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document.rupress = false;
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
    document.open();
    PdfContentByte cb = writer.getDirectContent();
    PdfTemplate template = cb.createTemplate(150, 150);
    template.setLineWidth(12f);
    template.arc(40f, 10f, 20f, -50f, 90f, 45f);
    template.stroke();
    template.setLineCap(PdfContentByte.LINE_JOIN_ROUND);
    template.arc(80f, 30f, 160f, 10f, 90f, 180f);
    template.arc(115f, 65f, 25f, 5f, 0f, 360f);
    template.stroke();
    cb.addTemplate(template, 1f, 0f, 0f, -1f, 0f, PageSize.A4.height());
    document.close();
  }
}

Set line width

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfWriter;
public class MainClass {
  public static void main(String[] args) throws Exception {
    Document.rupress = false;
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));
    document.open();
    PdfContentByte cb = writer.getDirectContent();
    cb.saveState();
    for (int i = 25; i > 0; i--) {
      cb.setLineWidth((float) i / 10);
      cb.moveTo(40, 806 - (5 * i));
      cb.lineTo(320, 806 - (5 * i));
      cb.stroke();
    }
    document.close();
  }
}