Difference Between Oracle JDK and OpenJDK

Difference Between Oracle JDK and OpenJDK

Java is one of the most popular and widely used programming languages. There are two types of Java Development Kit (JDK): Oracle JDK and OpenJDK.

Do you know the difference between Oracle JDK and OpenJDK? Let’s explore this article to find out the distinctions. Although there are numerous differences, both are currently owned by Oracle. So, without further ado, let’s jump directly to the main points.

What is JDK?

JDK stands for Java Development Kit and serves as a software development platform. It is primarily utilized in the development of various Java applications and applets.

JDK comprises several components, including the Java Runtime Environment (JRE), an interpreter/loader (Java), a compiler (javac), an archiver (jar), a documentation generator (Javadoc), and other tools essential for Java development.

What is Oracle JDK?

Oracle Java JDK is owned by the Oracle Corporation, but it was originally developed by Sun Microsystems. It comprises a set of computer software and specifications that offer a system for developing various application software.

Its implementations span across various platforms, including embedded devices, mobile phones, enterprise servers, supercomputers, etc. However, Oracle independently maintains both platforms.

What is OpenJDK?

OpenJDK is a free and open platform for Java. It originated from an effort initiated by Sun Microsystems in 2006, and it was further sponsored by Oracle. Several components that come with the OpenJDK project include the Java class library, the Java compiler, the Java Runtime Environment, and the Java Virtual Machine.

Oracle JDK vs OpenJDK

Here are some of the key differences between Oracle JDK and OpenJDK:

1. The Releases

Open Java will deliver releases every six months, while Oracle Java will be released every three years. You will receive long-term support from Oracle for its releases. On the contrary, Open Java provides changes for any release until the launch of the next version.

2. Licenses

The Oracle Binary Code License Agreement authenticates the Oracle JDK. On the other hand, the OpenJDK is governed by the GNU General Public License Version 2, along with a linking exception.

3. Overall output

Both Java platforms have no real technical differences, as the build process for the Oracle JDK is based on that of OpenJDK. When it comes to the overall performance of the platform, Oracle Java is comparatively much better than OpenJDK in terms of responsiveness and JVM performance. On the other hand, OpenJDK delivers releases more often; therefore, it increases instability.

4. Specifications

Oracle Java has features such as a Flight Recorder, Java Mission Control, and Application Class-Data Sharing. In contrast, OpenJDK possesses the font renderer feature.

Benefits Over Each Other

  • The releases for OpenJDK are quite frequent compared to Oracle Java.
  • Oracle Java concentrates more on stability, giving higher importance to its enterprise audience. However, it is relatively unstable in terms of releases.
  • Oracle Java possesses excellent garbage collection options with better and improved renderers. On the other hand, OpenJDK has fewer garbage collection options and slower graphics.
  • OpenJDK has a more extensive open-source community.


In the above-provided information, the two most popular Java Development Kits are discussed. Some noticeable features of both platforms are mentioned along with their benefits over each other.

Posted by
Ajoy Kumar

He is a Computer Science graduate dedicated to empowering individuals to forge successful careers in programming and the dynamic world of technology and industry.

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