Java PDF Libraries

7 Best Java PDF Libraries : Must Read for every Data Scientist

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Are you looking for  Java PDF Libraries to automate PDF creation and manipulation? This article will give you an overview of 7  best Java PDF Libraries of the current time.

These Java PDF libraries are not only useful for PDF creation and manipulation programmatic. But sometimes when we need to pull the data out from PDF. Actually, PDF is unstructured data. When you need to extract the data out of it, You need to perform the basic operation like line by line reading text or page by page etc. To perform such basic operation these Java PDF Libraries and Utility are important.

Best Java PDF Libraries :

Here is the list of Top 7 Java PDF Libraries. Actually every other has its own feature and specification so before choosing any of them. Please read the below description.

  1. IText –

If you are looking for making automation in documentation and Reporting. PDF is the best format. IText designs for Java and.Net developer for PDF processing and related operation. Here is the link to IText  Developer page .

java PDF Libraries IText
java PDF Libraries IText

2. Java PDF Library

A good option is an easy PDF SDK. This Java PDF Library has an Action Center that allows developers to generate and customize code for PDF applications automatically using over 50 different settings. A very capable PDF converter could be created with a few mouse clicks. Here is the link to check this Java PDF Library.
java pdf library
Java PDF Library

3.Apache PDF Box –

java PDF Libraries PDFBox

Apache PDFBox API is open source. It gives the utility to java developer for – Extracting Text, Splitting and merging PDF documents, save as Image and signing the PDF  and much more. Here is the quick link for downloading Apache PDFbox .

4. gnujpdf –

Its a java package. gnujpdf will also help you in creating PDF using Java AWT subclass. The Interesting fact about it is -” GNUJPDF is a modified version of  ‘retepPDF’ “.It has LGPL License. For more detail on gnujpdf visit  gnujpdf api details page.

java PDF Libraries PDFBox
java PDF Libraries PDFBox

5.PDF Clown for Java (PDF Jester)-

PDF Clown is an open source PDF processing in Java and.Net based Library. Download PDF Clown from here . It makes PDF rendering and styling hassle-free for you.

java PDF Libraries PDF Clown

6. Apache FOP 

FOP is Formatting Objects Processor. It’s a generalized API. I mean it’s not only PDF specific. Actually, it can generate multiple format output. As an input, it takes or reads the Formatting Object tree. You can download Apache FOP from here.

java PDF Libraries Apache FOP
Apache FOP Library

7. OpenPDF –

It is a newly emerging java library. It also comes with LGPL and MPL open source license. This OpenPDF library is iText source successor. Hence it has a high-performance pdf library.

java pdf - openpdf
java pdf – openpdf

java PDF library for Reporting –

Reports are little different than general PDFs . Reports are quite tabular in nature . Hence this section will add some java Pdf libraries for Reporting .


1. Jasper Reports

2.Dynamic Reports

3. Dynamic Jasper

3 Tips before choosing any Java PDF Library –

  1. make sure the license condition are aligned with your product or feature usages. Some time free word tagged on librarians confuse the developer. Actually Most of the time, The free words are associated with non-commercial uses. So please check before choosing any of  Java PDF Library. Otherwise, you do some code on the top of it. After some time you come to know it’s not License Friendly. Then you have to replace it. To avoid such situation is better.
  2. Do a little proof of Concept  on each functionality which you need to achieve using these API. Because Most of the time, It is recommended that we should use single API for the specific purpose.  For example, If you choose some java PDF Library which supports 8 features where you need 10. Therefore to achieve rest two feature we need to add another third-party API.So to avoid such situation we should first list down our specific requirement from that API. Then we should do small unit testing on that feature. Once all done then we should go finalize that  Java PDF Library for product.
  3. Good Documentation. Never choose any API which has low-quality documentation.

Notes for Developer while using Java PDF Library-

The most common mistake which puzzles the beginners in PDF processing is managing locks on file. Here I am not very specific with PDF files.It usually happens with every type of file processing. Actually, when you use any framework, you just call the function already defined into it. Usually, the code flow is designed in such a way that it auto handles the lock management. Still be careful. If you apply the lock anywhere manual, free it when you are done.

Otherwise, Java Virtual Machine  holds the file and you will be unable to move it until program terminated.

Other Learning Resources( Must Read is Interested in Data Science using Java) –

If you are a java developer and want to be a data scientist, Please read the article –

How a Java Engineer can Transform his career into Data Science | Java for Data Science ?

Once you read this article you will come to know what else requires to change your profile in Data Science.

Conclusion –

There could be many aspects why PDF and its processing is important for a data scientist. First of all its business aspect is,” It is mostly preferred by all type of organization for reporting”.All financial institution or any private or government organization report their financial position at certain to any regulatory at a certain time period. It has two ends. First is Report creation and Second is extracting the data from it.

Anyways It was not only the case. There are so many others. Just my Intent is to make you aware of PDF Libraries in general programming Although If we look at the technical side for using PDF as a preferred format. PDF full form is Portable Document Format. This portable feature makes the documentation distribution uniform across all platforms.

So How did you find the article “Top 7  Java PDF Libraries: Must Read for Data Scientist” . If you any suggestion on JAVA PDF LIBRARIES . Feel free to contact us or comment below .


Data Science Learner Team 

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