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Java JDK Installation

Page history last edited by Don Slater 4 years ago


Java JDK Installation





We recommend using Java 8 for Alice. However, for Mac OS X Mavericks(10.10) and El Capitan(10.11) users may find it necessary to install the Apple-released "legacy Java" package:




to get the "classic" Java 6 (a.k.a. v. 1.6) release and the dynamic libraries, some of which are still required by Alice.



"Java not found" error message



We are getting reports from people in which they are receiving a "Java not found" error message when they try to install and / or run Alice 3.1, and they have Java installed on their machine. If this happens to you, it will be very helpful if you perform the following steps:


  1. Go to the command line on your machine.
    1. Windows: Start Menu -> Run -> cmd)
    2. Mac OS X: Applications -> Terminal 
  2. type "java -version" (without the quotes).
  3. Copy and paste what is displayed and send it to us…
  4. If you get a message indicating that the system does not recognize the command, the path to Java may not be set correctly.


You may know that you have installed the latest version of Java on your machine… You may need to set the Java class path variable on your system.


See the following link:




There is a difference between the Java JDK, which you need for Alice, and the Java JRE. Make sure that you have installed the JDK.



If you do not have Java installed - Install Java and NetBeans 8


The following instructions provide a guide for downloading and installing Java. Due to updates in software and Internet websites, the images shown  may vary slightly from what you see on the webpage. The download and install steps, however, remain fairly consistent.



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