How to use the Java Config UI
Opening the UI
On Windows:
You can find the Java Config UI for Maltego by searching "configure" in your Start Menu and clicking on the application with the Maltego icon.
On Mac:
The jar file needed to run the Config UI should be located in the following location:
/Applications/Maltego.app/Contents/Resources/Maltego/maltego-ui/modules/ext/Java_Config_App.jar
Running the following command in your terminal, should launch the configure app:
java -jar /Applications/Maltego.app/Contents/Resources/Maltego/maltego-ui/modules/ext/Java_Config_App.jar
On Linux
In the Start Menu, search "Maltego Memory Config"
or run Maltego_memory_config in terminal
/usr/bin/maltego_memory_config
Selecting your Java installation
Once your have opened the configure UI, you can use the "Path" dropdown to select the Java installation to use when running Maltego.
Editing the Java Config file
If you would prefer to edit the config file rather than using the UI, you can edit the following text file:
On Windows:
C:\Users\< username >\AppData\Roaming\.maltego\v<maltego_version>\etc\maltego.conf
On Mac:
Applications/Maltego.app/Contents/Resources/Maltego/etc/Maltego.conf
On Linux:
/home/< username >/.maltego/< maltego_version >/etc/maltego.conf
Add/change the variable "jdkhome" in maltego.conf to point to the path of your Java installation.
jdkhome="C:\Program Files\Java\jre1.8.0_171"