iText PDF - Learn Java by Examples

How do I create Roman or Greek numeral list in iText?

By I Wayan Saryada in iText PDF Last modified: June 2, 2023 0 Comment

To create a Roman or Greek numeral list we can use special implementation list in the iText. The com.itextpdf.text.RomanList represent a Roman numeral list while the com.itextpdf.text.GreekList represent a Greek numeral list.

The list item can be created using the com.itextpdf.text.ListItem class. Let’s check out an example below:

package org.kodejava.itextpdf;

import com.itextpdf.text.*;
import com.itextpdf.text.pdf.PdfWriter;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;

public class RomanGreekListDemo {
    public static void main(String[] args) {
        Document doc = new Document();
        try {
            PdfWriter.getInstance(doc, new FileOutputStream("RomanGreekListDemo.pdf"));
            doc.open();

            List roman = new RomanList();
            roman.add(new ListItem("Item 1"));
            roman.add(new ListItem("Item 2"));
            roman.add(new ListItem("Item 3"));
            doc.add(roman);

            List greek = new GreekList();
            greek.add(new ListItem("Item 1"));
            greek.add(new ListItem("Item 2"));
            greek.add(new ListItem("Item 3"));
            doc.add(greek);
        } catch (DocumentException | FileNotFoundException e) {
            e.printStackTrace();
        } finally {
            doc.close();
        }
    }
}

Maven Dependencies

<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itextpdf</artifactId>
    <version>5.5.13.3</version>
</dependency>

How do I create internal Anchor in iText?

By I Wayan Saryada in iText PDF Last modified: June 2, 2023 1 Comment

The com.itextpdf.text.Anchor class in iText can be used to create an internal link or external link in a PDF document. To create an internal link we must format the anchor reference using the # + referenceName. On the other side the target anchor should be named using the same reference name excluding the # symbol.

To set the reference we use the setReference() method. To define the target anchor we can name the anchor using the setName() method.

package org.kodejava.itextpdf;

import com.itextpdf.text.Anchor;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.PdfWriter;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;

public class AnchorInternalDemo {
    public static void main(String[] args) {
        Document document = new Document();
        try {
            PdfWriter.getInstance(document, new FileOutputStream("AnchorInternal.pdf"));
            document.open();

            Anchor anchor = new Anchor("[Continue Here]");
            anchor.setReference("#targetLink");
            Paragraph para1 = new Paragraph("The quick brown fox jumps over the lazy dog. ");
            para1.add(anchor);
            document.add(para1);

            Anchor target = new Anchor("The quick onyx goblin jumps over the lazy dwarf.");
            anchor.setName("targetLink");
            Paragraph para2 = new Paragraph();
            para2.setSpacingBefore(150);
            para2.add(target);
            document.add(para2);

            document.close();
        } catch (DocumentException | FileNotFoundException e) {
            e.printStackTrace();
        } finally {
            document.close();
        }
    }
}

Maven Dependencies

<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itextpdf</artifactId>
    <version>5.5.13.3</version>
</dependency>

How do I create Chapter in iText?

By I Wayan Saryada in iText PDF Last modified: June 2, 2023 0 Comment

This brief example show you how to create chapter in the PDF document using iText. To create chapter we use the com.itextpdf.text.Chapter class. We can pass the chapter title and the chapter number as the parameter for the Chapter constructor.

To create a section for the chapter we can use the com.itextpdf.text.Section class. To add a section we call the Chapter.addSection() method of the Chapter object. Let’s look at the example below:

package org.kodejava.itextpdf;

import com.itextpdf.text.*;
import com.itextpdf.text.pdf.PdfWriter;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;

public class ChapterDemo {
    public static void main(String[] args) {
        // Creates a new document
        Document document = new Document();
        try {
            // Prepare PDF writer and open the document.
            PdfWriter.getInstance(document, new FileOutputStream("ChapterDemo.pdf"));
            document.open();

            // Creates a new Chapter object
            Chapter chapter = new Chapter("Chapter One", 1);

            // Add sections to the chapter
            Section section = chapter.addSection("This is Section 1", 2);
            Paragraph paragraph = new Paragraph("This is the paragraph of the Section 1");
            section.add(paragraph);

            chapter.addSection("This is Section 2", 2);

            document.add(chapter);
        } catch (DocumentException | FileNotFoundException e) {
            e.printStackTrace();
        } finally {
            document.close();
        }
    }
}

Maven Dependencies

<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itextpdf</artifactId>
    <version>5.5.13.3</version>
</dependency>

How do I create Anchor or link in iText?

By I Wayan Saryada in iText PDF Last modified: June 2, 2023 2 Comments

This example show you how to use the com.itextpdf.text.Anchor class to create an external link in the PDF document. You can create an instance of Anchor with a phrase of string and set its reference, in this case a website URL, by calling the setReference() method of this object.

package org.kodejava.itextpdf;

import com.itextpdf.text.Anchor;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.PdfWriter;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;

public class AnchorDemo {
    public static void main(String[] args) {
        Document doc = new Document();
        try {
            PdfWriter.getInstance(doc, new FileOutputStream("AnchorDemo.pdf"));
            doc.open();

            String content = "You can learn Java programming on the " +
                    "following website: ";
            Paragraph paragraph = new Paragraph(content);

            // Creates a new anchor that link to external website
            // and add this anchor to the paragraph.
            Anchor anchor = new Anchor("Learn Java by Examples");
            anchor.setReference("https://kodejava.org");
            paragraph.add(anchor);

            doc.add(paragraph);
        } catch (DocumentException | FileNotFoundException e) {
            e.printStackTrace();
        } finally {
            doc.close();
        }
    }
}

Maven Dependencies

<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itextpdf</artifactId>
    <version>5.5.13.3</version>
</dependency>

How do I set Paragraph indentation in iText?

By I Wayan Saryada in iText PDF Last modified: June 2, 2023 0 Comment

To set paragraph indentation in the iText Paragraph object we can use the setFirstLineIndent(), setIndentationLeft() and setIndentationRight(). These methods accept a float value as a parameter.

The setFirstLineIndent() method set the first line indentation of a paragraph, while the setIndentationLeft() and setIndentationRight() methods set the left and the right indent of the paragraph. Let see an example below:

package org.kodejava.itextpdf;

import com.itextpdf.text.Chunk;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.PdfWriter;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;

public class ParagraphIndentationDemo {
    private static final String CONTENT = """
            Lorem ipsum dolor sit amet, consectetur adipisicing elit, \
            sed do eiusmod tempor incididunt ut labore et dolore magna \
            aliqua. Ut enim ad minim veniam, quis nostrud exercitation \
            ullamco laboris nisi ut aliquip ex ea commodo consequat. \
            Duis aute irure dolor in  reprehenderit in voluptate velit \
            esse cillum dolore eu fugiat nulla pariatur. Excepteur sint \
            occaecat cupidatat non proident, sunt in culpa qui officia \
            deserunt mollit anim id est laborum.
            """;

    public static void main(String[] args) {
        Document document = new Document();
        try {
            PdfWriter.getInstance(document,
                    new FileOutputStream("ParaIndentation.pdf"));
            document.open();

            Paragraph paragraph = new Paragraph();
            paragraph.add(new Chunk(ParagraphIndentationDemo.CONTENT));

            // Set paragraph's first line indent
            paragraph.setFirstLineIndent(75);

            // Set paragraph's left side indent
            paragraph.setIndentationLeft(50);

            // Set paragraph's right side indent
            paragraph.setIndentationRight(25);
            document.add(paragraph);
        } catch (DocumentException | FileNotFoundException e) {
            e.printStackTrace();
        } finally {
            document.close();
        }
    }
}

Maven Dependencies

<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itextpdf</artifactId>
    <version>5.5.13.3</version>
</dependency>