If this command had failed (meaning Java isn't installed at all), that would mean Java was not installed on your machine. That's OK, as long as it is at least 1.8.0_something. Java(TM) SE Runtime Environment (build 1.8.0_152-b16) You might have something slightly different, like C:\>java -version This says you have version 8 installed (8 and 1.8 are synonymous). Java(TM) SE Runtime Environment (build 1.8.0_74-b02) It should look something like this: C:\>java -version and type java -version in Mac OS X, Applications > Utilities > Terminal)Īnd type java -version at the command prompt. Open a command window (in Windows, Start > Run. Here's how to find out which JRE you have on your computer. If you think you already have the right JRE and JDK, find out this way: You don't need to know much more than the fact that there isĪ JRE and a JDK. You can see a diagram of what each contains on this website:Ĭomplexity. It includes a debugger, as well as lots of other pieces that help Java work smoothly. This includes the compiler, which translates Java programs into the Java virtual machine language. This includes everything needed to run Java programs, including an interpreter for its machine language (the Java Virtual Machine) and the libraries of codes of classes that come with Java.Ī Java Development Kit (JDK). If you have versions 9, 10, or 11, change your setting in Eclipse so that it uses Compiler compliance level 1.8 (Open preferences, Java -> Compiler). You have to get both the Java Platform and Eclipse onto your computer. It is housed in an integrated development environment (IDE)Ĭalled Eclipse. CS 2110 uses the Java Standard Edition (Java SE 8) platform.
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