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The Java Runtime Environment (JRE) allows applets written in the Java programming language to run inside various browsers in a secure environment. Java is installed in many Windows, Mac, and Linux browsers and is often updated automatically. Learn more.

How to Obtain

First, find out which version of Java you are using. 

important Important: When visiting the link below, DO NOT click the large, red "Free Java Download" button. DO click on the "test the currently installed version of Java" link in the sentence below the button.

For security reasons, IS&T recommends the most recent version of Java 7 for most users.

Java 6

Some MIT applications require Java 6. If you are having a problem with an MIT application, try downgrading to Java 6:

  • Windows: Downgrade to Java 6 Release 43
  • Mac: Downgrade to Java 6
    • Run the shell script to enable Java 6 on your Macintosh: Shell script for 10.7 and 10.8
      Note: The fix will be overwritten daily, by Apple's XProtect anti-malware software. Run the script each day in order to enable Java 6 on your Macintosh.
  • Linux: Check your distribution.


Which Jave version should I install?


Java in the Knowledge Base