Installing the Java Development Kit (JDK)
You may already have Java installed on your machine. You can check by opening a terminal window and running the command java-version. If you do not have Java or need to upgrade, follow the steps:
- Browse on over to the Java SE Downloads web page at http://www.oracle.com/technetwork/java/javase/downloads/index.html and get it. Look for the JDK button icon, which takes you to the downloads page.
- Choose the package for your system. For example, for Windows choose Windows x64. After the file downloads, open it and follow the installation instructions.
- Make a note of the installation directory for later reference.
- Once installed, open a fresh terminal window and run java -version once more to verify.
Whether you just installed the JDK or it was already there, please make a note of its location on your disk. You will need to tell Unity this information in a later step.
On Windows, the path is probably something like Windows: C:\Program Files\Java\jdk1.8.0_111\bin.
If you can't find it, open Windows Explorer, navigate to the \Program Files folder, look for Java, and drill down until you see its bin directory, as the following screenshot shows:
On OS X, the path is probably something like: /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home.
If you can't find it, from a terminal window, run the following command: /usr/libexec/java_home.