{"id":8029,"date":"2014-01-07T16:00:19","date_gmt":"2014-01-07T14:00:19","guid":{"rendered":"http:\/\/examples.javacodegeeks.com\/?p=8029"},"modified":"2021-05-24T13:03:41","modified_gmt":"2021-05-24T10:03:41","slug":"java-version-check-checking-java-version-in-windows-linux-macos","status":"publish","type":"post","link":"https:\/\/examples.javacodegeeks.com\/check-java-version-in-windows-linux-macos\/","title":{"rendered":"How to Check Java version in Windows, Linux, MacOS"},"content":{"rendered":"

In this tutorial we will show how to check the Java version in different operating systems, such as Windows, Linux and Macintosh.<\/p>\n

Depending on your operating system, there are a couple of methods, in order to find the installed Java version<\/code>. There are methods that apply to all operating systems and methods that apply to each one exclusively.<\/p>\n

1. Check Java version in all Operating Systems<\/h2>\n

1. First of all, using the terminal (Linux or Mac) or the command prompt (Windows), issue the following command:<\/p>\n

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1<\/div>\n<\/td>\n
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java \u2013version<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

A sample execution of the command in a Linux computer is shown below:<\/p>\n

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\"Check<\/a>
java_version_Linux_WM<\/figcaption><\/figure>\n<\/div>\n

Important:<\/b> In order for this command to be executed in Windows, the $JAVA_HOME<\/code> environment variable must be defined and properly point to the home installation folder of Java.<\/p>\n

2. Using your Web browser, you can visit the Verify Java Version<\/a> page.<\/p>\n

However, if your browser does not contain the necessary plugins or there is some configuration error, you will not be able to execute the aforementioned verification applet. Also, if you don\u2019t succeed in executing the applet, this does not suggest that Java is not installed in your system.<\/p>\n

3. Moreover, you can execute the following Java code that prints the current version<\/code> of Java:<\/p>\n

FindJavaVersion.java:<\/span><\/i><\/p>\n

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package<\/code> main.java;<\/code><\/div>\n
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public<\/code> class<\/code> FindJavaVersion {<\/code><\/div>\n
     <\/code>public<\/code> static<\/code> void<\/code> main(String[] args) {<\/code><\/div>\n
          <\/code>System.out.println(System.getProperty(<\/code>\"java.version\"<\/code>));<\/code><\/div>\n
     <\/code>}<\/code><\/div>\n
}<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

2. Find Java version \u2013 Windows only<\/h2>\n

The latest versions of Java, along with the installed JRE, they provide a Java Control Panel<\/code>. Among other informations, the Java Control Panel<\/code> also contains the installed Java version<\/code>:

<\/div> <\/div><\/p>\n