Download and Install Java

Try the offline installer package (Windows only)

The offline installer package will often complete successfully even though the online installer package has encountered a problem. The offline installer package file is large and will take longer to download than the online installer.
» Download the Windows Offline installer

Uninstall any non-working Java installations

Remove prior installations of Java that are not working before trying to install again.
» Uninstall Java for Windows
» Uninstall Java for Mac

Temporarily turn off firewall or antivirus clients

Active firewall or antivirus software may prevent Java from installing properly. Remember to turn your firewall or antivirus software back on when you have successfully completed the Java install.

You can test your Java installation using the instructions in the Test Java section below.

Use Java

Once you have determined that Java is installed correctly, try the following items to help you run a particular Java application.

Restart your browser after installing Java to enable the new version

If you are still prompted to update Java after installing the latest version, try restarting your browser. Close all of the browser windows, then reopen any web pages that require Java. Starting a new browser session should make the latest installed version of Java active in your browser.

Activate Java, when prompted by the browser

If Java is not activated in the browser, you will be unable to run Java applications in that browser.
» Activate Java plug-in in the browser

Check if the Java plug-in is enabled in the browser

Browsers may disable the Java plug-in or related add-ons by default. You may need to configure your browser to enable the Java plug-in.
» Enable Java plug-in in the browser

Verify that Java is enabled in the Java Control panel

If Java is not enabled in the Java Control Panel, you will be unable to run Java applications in any browser.
» Enable Java content in the browser using the Java Control panel

Configure security settings

Ensure that the Java security level is not preventing the application from running. The default security level may restrict the ability to run applications that may present a risk to your computer.
» Configure security level settings in the Java Control panel

Clear the Java cache (temporary) files

Sometimes a corrupted file in the Java cache can prevent an application from running. You can safely delete the temporary files that Java downloads since Java will download them again and ensure they are up-to-date.
» Clear the Java cache

Check Antivirus or Firewall settings related to Java

Users should check with antivirus security apps and also Firewall settings to see if there are areas to configure java plugins and if they could add trusted sites.

Java does not work in Firefox after installing Java 7 Update 10 (7u10) and above (Windows only)

This is caused by a conflict between Java 7u10 and above and previous standalone installations of JavaFX.
» Making Java work with Firefox

Verify proxy settings

Ensure that you are using the appropriate proxy settings if they are necessary for your particular internet configuration.
» Set proxy settings in the Java Control panel

Test Java

Ensure that Java is enabled in your browser

Once the Java installation has completed, you can use the following test page to verifiy that Java is working in your browser. It is possible that Java has been disabled in your browser and if so, the browser will show a message within the test applet on the page.
» Verify that Java is working in your browser using the Test Java page.

Uninstall Old Versions of Java (Windows only)

Remove all old Java versions to reduce security risks

Keeping old and unsupported versions of Java on your system presents a serious security risk. Uninstalling older versions of Java from your system ensures that Java applications will run with the most up-to-date security and performance improvements.
» Remove old Java versions

Find Java

Options to find installed Java versions

» Use the Verify or Test Java applets (recommended)
» If you can't run applets, find the Java version using the manual method (Windows only)

Always redirected to Java.com when visiting a page with a Java app

Workaround

If you are unable to complete the installation of Java, you may encounter an issue, getting redirected to the Java.com download page when visiting a page with a Java application. The issue is planned to be fixed in an upcoming update of Java. In the meantime, try the workarounds on the FAQ to resolve the issue.