Last updated: January 24, 2019
Update: For additional help with how to test Java, please also see Java support on Windows 10. macOS users please see Java support in Safari 12.
Java is a free software developed by Oracle Corporation, and also a programming language. When you download and install the free Java software, you are installing the Java Runtime Environment (JRE). This includes the Java Virtual Machine (JVM). When referring to “Java” in this article, we are referring to JRE, which is a web browser plug-in.
JRE is required to run Java applets in your web browser. Web browser plug-ins like Java have been historically prone to vulnerabilities. To ensure the safety of your system, and the efficiency in which Java applets run, it is advisable to keep your computer’s Java installation current. Oracle releases Java updates on a regular cycle, as well as out-of-cycle updates as warranted. Check for updates frequently, and test Java as needed.
Test Java and remove old versions
Test Java to ensure that your computer’s Java installation is up-to-date, and functioning correctly. You may test Java on your computer by visiting the Test Java page provided by Oracle on its Java.com web site. This utility will check your current Java installation. It will also remove old Java versions from your computer that may pose a security threat to your system. If your Java is working correctly, and the test finds no out-of-date Java versions, you will see the following notification accompanied by information about your Java installation and your computer:
If your Java is not working properly, the Test Java page displays additional configuration options that you may need to check, as well as download and installation instructions if needed.
After you have completed your Java test, and see the notification that you have the recommended Java installed, you may close the web browser tab or window where you conducted the test. However, if you require a Java update after completing the test, please note that you will need to restart your web browser for the change to take effect. To do so, close all of your open web browser tabs and windows. Finally, open a new browser window, and navigate to the Java content you wish to use.
Test Java page: http://www.java.com/en/download/help/testvm.xml
Also see: Java Support in Google Chrome
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