Simply change this path to point to your preferred JDK bin directory. The system PATH should have an entry for Java that the installer left. Note that there is one for the system at the bottom, and one for your user at the top. From here find the Environment Variables button in the bottom right.įrom here you can change your PATH variables. Press Windows key and search for 'environment' and you should see the result for editing environment variables.įollow that link to open the system properties window. The second JDK will override and take over as the system default until the PATH is changed. jar extension to be runnable by double clicking them. The first Java installed will add itself to your PATH environment variable, which allows you to open the command prompt and start using the java command line executable. You can go through both installers with all of the default settings unless you want to customize it.

I choose to install 1.8 first, and then 9. Install the JDKsĪfter downloading, simply locate your downloaded files, and double click them to run the installer. I'm going to download them and show you how to compile and run one of them to make sure everything is working.įollow the same steps to download the Java 9 JDK. The demos are not installed, but come in a zip file of standalone Java source code examples. It is full of great code examples you can use as reference material, and precompiled programs ready to run. If you want to download demos and sample code, scroll down on the page and download the demos that go with the JDK you downloaded. On the download page, accept the license by clicking the radio button and download the relevant version, Windows 圆4 for most people.ĭownload the JDK 1.8 Demos and Samples (Optional) The JDK also includes the JRE, so there is no need to download both the JDK and JRE separately.

The JDK is the Java Development Kit and needed for compiling. The JRE is only the Java Runtime Environment which is all you need as an end-user to run programs, but does not include the compiler and developer tools. Search for Java 1.8 JDK and Java 9 JDK or go directly to Make sure you download the JDK and not the JRE. If you only want to install one version, I recommend using 1.8 for now. Java 9 is the latest right now, but NetBeans and some other tools require Java 1.8. Download the JDK 1.8 Installerįor this example we will install Java 1.8 and Java 9 in order to show how to manage two versions at once. When we're done, we'll have both JDKs installed, with one of them set up as our default leaving us with a Java development environment ready to compile and run applications. P.S in the example above, stream has been ranked before collect, so '=100000' became 'oldValue'.In this tutorial we will walk through the process of installing the Java 1.8 and Java 9 JDKs in Windows for Java development.

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