What are the system requirements for Java on Windows?
Please refer to Java SE 8 certified systems configurations page.

How do I get Java for Windows?
You can download Java from java.com.

How do I install Java on Windows?
See Java installation instructions.

How do I update Java on Windows?
See How to update Java on Windows.

How do I enable Java on Windows?
When you install Oracle Java on your Windows, Java will be enabled by default.
If you are running a Java application in the browser, you will need to also check that Java is enabled in your browser.

How do I uninstall Java on Windows?
See Java uninstall instructions.

How do I find out what version of Java I have on Windows?Under System Preferences click on the Java icon to access the Java Control Panel which will list your Java version. If you do not see a Java icon under System Preferences, Java 8 or later versions is not installed.

How do I clear the Java cache on Windows?
See How to clear the Java cache on Windows.

Is it safe to install previous or older versions of Java?
Oracle highly discourages users from using older versions of Java. Installing old and unsupported versions of Java on your system presents a serious security risk. Upgrading to the latest version of Java ensures that Java applications will run with the most up-to-date security and performance improvements on your system. If installing an older version of Java is absolutely required, you must first uninstall the current version. See the instructions at uninstall Java FAQ.

The installation hangs during an auto-update, what can I do to get the latest Java?
During an auto-update, users might see the installation stall. Download latest Java 8 from java.com.

When I try to use java from the command line, why doesn't it work? I have Oracle's version of the JRE installed.
Installing JRE from Oracle does not update java -version symlinks or add java to your path. For this functionality, you must install the full JDK. See command line info.

How do I report issues related to Java?
Provide us details at Feedback form for reporting issues related to Java.