MATLAB ships with one specific version of the JVM software on Linux OS depending on the release. MATLAB is fully supported only on these shipped versions of the JVM software. Some components might not work properly under a different version of the JVM software. For example, calling functions in a dynamically linked library that was created with a different JVM software version than that used by MATLAB might cause a segmentation violation error message.
If you choose to change the JVM software version used by MATLAB, you must:
1. Download and install the desired version of the JRE (Java Runtime Environment) or the JDK (Java Development Kit). The latter contains the JRE and development tools.
2. Determine the path of the JRE directory within that installation. This varies by platform and whether you downloaded the JRE or JDK (see below).
3. Set the MATLAB_JAVA environment variable to this path (see below).
4. Start MATLAB while that environment variable is set (see below).
Setting MATLAB to use new Java
The JDK or JRE will be located in the directory where you installed it after downloading. The JRE path is the directory named "jre" beneath that directory.
On csh or tcsh shells, use the "setenv" command to set the MATLAB_JAVA environment variable. For example:
setenv MATLAB_JAVA <JRE path>
This command needs to be run in every new shell window.
On the bash shell, execute:
export MATLAB_JAVA=<JRE path>
This setting will apply to MATLAB launched from that shell window.
Verifying the Installation
To verify that MATLAB is using the correct version of the JVM software, type the following at the MATLAB prompt:
If MATLAB is not using your value of MATLAB_JAVA, you may need to logout and log back in again.
To change the JVM MATLAB uses for other systems, use the following links.