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31st May 2016
iText PDF

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    This file is part of the iText (R) project.
    Copyright (c) 1998-2016 iText Group NV


 * This example was written in answer to the question:
 * http://stackoverflow.com/questions/33952183
package com.itextpdf.samples.sandbox.stamper;

import com.itextpdf.kernel.color.Color;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfReader;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.samples.GenericTest;
import com.itextpdf.test.annotations.type.SampleTest;

import java.io.File;

import org.junit.experimental.categories.Category;

public class HighLightByAddingContent extends GenericTest {
    public static final String DEST
            = "./target/test/resources/sandbox/stamper/high_light_by_adding_content.pdf";
    public static final String SRC
            = "./src/test/resources/pdfs/hello.pdf";

    public static void main(String[] args) throws Exception {
        File file = new File(DEST);
        new HighLightByAddingContent().manipulatePdf(DEST);

    protected void manipulatePdf(String dest) throws Exception {
        PdfDocument pdfDoc = new PdfDocument(new PdfReader(SRC), new PdfWriter(dest));
        PdfCanvas canvas = new PdfCanvas(pdfDoc.getFirstPage().newContentStreamBefore(),
                pdfDoc.getFirstPage().getResources(), pdfDoc);
        canvas.rectangle(36, 786, 66, 16);

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