Itext: Working with Chunk object

Chunk represents text that is added to the document. Technically chunk is a string with specific font properties.

Chuck class provides following constructors to define a Chunk instance.

public Chunk()

public Chunk(final Chunk ck)

public Chunk(final String content)

public Chunk(final String content, final Font font)

public Chunk(final char c)

public Chunk(final char c, final Font font)

public Chunk(final Image image, final float offsetX, final float offsetY)

public Chunk(final Image image, final float offsetX, final float offsetY,final boolean changeLeading)

public Chunk(final DrawInterface separator)

public Chunk(final DrawInterface separator, final boolean vertical)

Following step-by-step procedure explains, how to write chunk of data to pdf file.

Step 1: Define Document instance.

Document document = new Document();

Step 2: Get PdfWriter instance and set leading.

PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("countries.pdf"));

writer.setInitialLeading(16);

‘writer.setInitialLeading(16)’  specify the space between two lines. If you comment this line, all the text is written on same line.

Step 3: Define font object.

Font font = FontFactory.getFont(FontFactory.COURIER, 20, Font.NORMAL, BaseColor.BLACK);

Step 4: Define Chunk instance.

Chunk chunk = new Chunk("data", font);

Step 5: Write the chunk to the document.

document.add(chunk);

document.add(Chunk.NEWLINE);

Step 6: After adding the data, close the document.

document.close();

Following example writes list of countries to the pdf document ‘countries.pdf’ using Chuck.

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.util.Arrays;
import java.util.List;

import com.itextpdf.text.BaseColor;
import com.itextpdf.text.Chunk;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Font;
import com.itextpdf.text.FontFactory;
import com.itextpdf.text.pdf.PdfWriter;

public class HelloWorld {
 private static List<String> countries = Arrays.asList("Afghanistan", "Armenia", "Azerbaijan", "Bahrain",
   "Bangladesh", "Bhutan", "Brunei", "Cambodia", "China", "Cyprus", "Georgia", "India", "Indonesia", "Iran",
   "Iraq", "Israel", "Japan", "Jordan", "Kazakhstan", "Kuwait", "Kyrgyzstan", "Laos", "Lebanon", "Malaysia",
   "Maldives", "Mongolia", "Myanmar (Burma)", "Nepal", "North Korea", "Oman", "Pakistan", "Palestine",
   "Philippines", "Qatar", "Russia", "Saudi Arabia", "Singapore", "South Korea", "Sri Lanka", "Syria",
   "Taiwan", "Tajikistan", "Thailand", "Timor-Leste", "Turkey", "Turkmenistan", "United Arab Emirates (UAE)",
   "Uzbekistan", "Vietnam", "Yemen");

 private static Font font = FontFactory.getFont(FontFactory.COURIER, 20, Font.NORMAL, BaseColor.BLACK);
 private static Font fontHeading = FontFactory.getFont(FontFactory.HELVETICA, 25, Font.BOLD,
   new BaseColor(255, 0, 0));

 public static void main(String args[]) throws FileNotFoundException, DocumentException {
  Document document = new Document();

  PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("countries.pdf"));
  writer.setInitialLeading(16);

  document.open();

  document.add(new Chunk("List Of Countries in Asia", fontHeading));
  document.add(Chunk.NEWLINE);
  document.add(Chunk.NEWLINE);

  for (String country : countries) {
   Chunk chunk = new Chunk(country, font);
   document.add(chunk);
   document.add(Chunk.NEWLINE);
  }

  document.close();

 }
}

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