Colored text

This is a code example of iText PDF, discover more.

31st May 2016
admin-marketing
ColoredLetters.java
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/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2019 iText Group NV
    Authors: iText Software.
 
    For more information, please contact iText Software at this address:
    sales@itextpdf.com
 */
/**
 * Example written by Bruno Lowagie in answer to:
 * http://stackoverflow.com/questions/27080565/itext-make-a-single-letter-bold-within-a-word
 */
package com.itextpdf.samples.sandbox.objects;
 
import com.itextpdf.io.font.constants.StandardFonts;
import com.itextpdf.kernel.colors.ColorConstants;
import com.itextpdf.kernel.font.PdfFontFactory;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.element.Text;
import com.itextpdf.samples.GenericTest;
import com.itextpdf.test.annotations.type.SampleTest;
 
import org.junit.experimental.categories.Category;
 
import java.io.File;
import java.io.IOException;
 
@Category(SampleTest.class)
public class ColoredLetters extends GenericTest {
    public static final String DEST = "./target/test/resources/sandbox/objects/colored_letters.pdf";
 
    public static void main(String[] args) throws Exception {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new ColoredLetters().manipulatePdf(DEST);
    }
 
    public void manipulatePdf(String dest) throws IOException {
        PdfDocument pdfDoc = new PdfDocument(new PdfWriter(dest));
        Document doc = new Document(pdfDoc);
 
        Paragraph p = new Paragraph();
        String s = "all text is written in red, except the letters b and g; they are written in blue and green.";
        for (int i = 0; i < s.length(); i++) {
            p.add(returnCorrectColor(s.charAt(i)));
        }
        doc.add(p);
 
        doc.close();
    }
 
    private Text returnCorrectColor(char letter) throws IOException {
        if (letter == 'b') {
            return new Text("b")
                    .setFontColor(ColorConstants.BLUE)
                    .setFont(PdfFontFactory.createFont(StandardFonts.HELVETICA_BOLD));
        } else if (letter == 'g') {
            return new Text("g")
                    .setFontColor(ColorConstants.GREEN)
                    .setFont(PdfFontFactory.createFont(StandardFonts.HELVETICA))
                    .setItalic();
        } else {
            return new Text(String.valueOf(letter))
                    .setFontColor(ColorConstants.RED)
                    .setFont(PdfFontFactory.createFont(StandardFonts.HELVETICA));
        }
    }
}
ColoredText.java
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/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2019 iText Group NV
    Authors: iText Software.
 
    For more information, please contact iText Software at this address:
    sales@itextpdf.com
 */
/**
 * Example written by Bruno Lowagie in answer to:
 * http://stackoverflow.com/questions/27578497/applying-color-to-strings-in-paragraph-using-itext
 */
package com.itextpdf.samples.sandbox.objects;
 
import com.itextpdf.io.font.constants.StandardFonts;
import com.itextpdf.kernel.colors.ColorConstants;
import com.itextpdf.kernel.font.PdfFontFactory;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.layout.Canvas;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.element.Text;
import com.itextpdf.samples.GenericTest;
import com.itextpdf.test.annotations.type.SampleTest;
 
import org.junit.experimental.categories.Category;
 
import java.io.File;
import java.io.IOException;
 
@Category(SampleTest.class)
public class ColoredText extends GenericTest {
    public static final String DEST = "./target/test/resources/sandbox/objects/colored_text.pdf";
 
    public static void main(String[] args) throws Exception {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new ColoredText().manipulatePdf(DEST);
    }
 
    public void manipulatePdf(String dest) throws IOException {
        PdfDocument pdfDoc = new PdfDocument(new PdfWriter(dest));
        Document doc = new Document(pdfDoc);
 
        Text redText = new Text("This text is red. ")
                .setFontColor(ColorConstants.RED)
                .setFont(PdfFontFactory.createFont(StandardFonts.HELVETICA));
        Text blueText = new Text("This text is blue and bold. ")
                .setFontColor(ColorConstants.BLUE)
                .setFont(PdfFontFactory.createFont(StandardFonts.HELVETICA_BOLD));
        Text greenText = new Text("This text is green and italic. ")
                .setFontColor(ColorConstants.GREEN)
                .setFont(PdfFontFactory.createFont(StandardFonts.HELVETICA_OBLIQUE));
 
        Paragraph p1 = new Paragraph(redText).setMargin(0);
        doc.add(p1);
        Paragraph p2 = new Paragraph().setMargin(0);
        p2.add(blueText);
        p2.add(greenText);
        doc.add(p2);
 
        new Canvas(new PdfCanvas(pdfDoc.getLastPage()), pdfDoc, new Rectangle(36, 600, 108, 160))
                .add(p1)
                .add(p2);
 
        doc.close();
    }
}

Click the following link to see the legacy example for iText 5. Except for security fixes, iText 5 is no longer being developed.



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