itext Getting started with itext Hello World

Example

This is a very simple program to create a PDF using iText 7 / Java:

//Initialize writer
PdfWriter writer = new PdfWriter(dest);

//Initialize document
PdfDocument pdfDoc = new PdfDocument(writer);
Document doc = new Document(pdfDoc);

//Add paragraph to the document
doc.add(new Paragraph("Hello World!"));

//Close document
doc.close();

(Listing_01_01_HelloWorld.java)

You can navigate to many other examples from that page.

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And this is a very simple program to create a PDF using the precursor iText 5.5.x / Java:

// step 1
Document document = new Document();
// step 2
PdfWriter.getInstance(document, new FileOutputStream(filename));
// step 3
document.open();
// step 4
document.add(new Paragraph("Hello World!"));
// step 5
document.close();

(HelloWorld.java)

There are many more examples to navigate from this page, too.

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These two examples look pretty similar. The advantages of the re-designed iText 7 API will become apparent, though, as soon as one starts to look closer at less trivial examples. Thus, simply navigate through the example source code from the links above and compare.