How To Determine and Find Installed Java Runtime Version?

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Java Runtime Environment is used to run Java applications. Java Runtime Environment is called JRE. There are different versions of JRE most recents major versions are 6,7,8 . Some of the applications generally requires different version because of comp ability problems. In this tutorial we will look how to get JRE or Java version from various operating systems.

If you want to learn JRE and differencies with JDK please read following tutorial.

Java JDK vs JRE What Are Differences and Similarities?

Java or JRE Version Numbers

Java uses a bit different version numbers. All java versions first numbers is 1 and actual major version numbers change according to release which is current 8 . Example Java version number is like below.

1.8.0_99

Determine JAVA Version in Windows From Command Line

We have different methods to determine Java or JRE version in windows. First way is running java command in command like with version information. We will also provide -version option like below.

Determine JAVA Version in Windows
Determine JAVA Version in Windows

We can see that cırrent JRE or Java cersion is 1.8.0_144 . Here we can call 8 as major version number

Determine JAVA Version in Windows From GUI

We can use Java menu which resides in Control Panel.

Determine JAVA Version in Windows From GUI
Determine JAVA Version in Windows From GUI

And then In the General tab click to About button. This will open a new window which will provide information about current Java or JRE version.

Determine JAVA Version in Windows From GUI
Determine JAVA Version in Windows From GUI

Determine Java Version Linux (CentOS, RedHat, Fedora, Ubuntu, Debian, Kali, Mint)

We will use java command from command line to get information about Java or JRE installation of Linux distributions.

LEARN MORE  Php Tutorial

Determine Java Version Linux (CentOS, RedHat, Fedora, Ubuntu, Debian, Kali, Mint)
Determine Java Version Linux (CentOS, RedHat, Fedora, Ubuntu, Debian, Kali, Mint)

Determine Java Version Online

There is also option to get Java version from online web site that runs applet and provides Java information. This applet can be accessed from following URL.

https://java.com/en/download/uninstallapplet.jsp

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