Launch G. Projector on macOS: Java 11 Required, OpenJDK Installed
If you're trying to launch G. Projector on macOS and you're encountering the error message "lack Java 11," but you have OpenJDK installed, this article will guide you through the necessary steps to successfully launch the application.
Checking Java Version
First, let's verify the Java version installed on your system. Open Terminal and run the following command:
java -version
If OpenJDK is correctly installed, you should see output similar to the following:
openjdk version "11.0.15" 2022-04-19
OpenJDK Runtime Environment AdoptOpenJDK-11.0.15+10 (build 11.0.15+10)
OpenJDK 64-Bit Server VM AdoptOpenJDK-11.0.15+10 (build 11.0.15+10, mixed mode)
Setting JAVA\_HOME Variable
Even if OpenJDK is installed, the G. Projector application might not be able to find it. To resolve this issue, you need to set the JAVA\_HOME environment variable to point to the OpenJDK installation directory.
First, locate the OpenJDK installation directory. By default, it should be:
/Library/Java/JavaVirtualMachines/adoptopenjdk-11.jdk/Contents/Home
Next, open Terminal and run the following commands to set the JAVA\_HOME variable:
export JAVA_HOME=/Library/Java/JavaVirtualMachines/adoptopenjdk-11.jdk/Contents/Home
export PATH=$JAVA_HOME/bin:$PATH
Launching G. Projector
Now, try launching G. Projector again. If it still doesn't work, you might need to specify the Java 11 path directly when launching the application. Run the following command in Terminal:
/usr/libexec/java_home -v 11
Take note of the output, which should be the path to the Java 11 installation. Then, run the following command to launch G. Projector:
/path/to/G.Projector --module-path /path/to/java11 --module javafx.controls/com.sun.javafx.application.LauncherImpl
Replace /path/to/G.Projector with the actual path to the G. Projector application and /path/to/java11 with the path to the Java 11 installation.
- Verify Java version installed on your system.
- Set the JAVA\_HOME environment variable to point to the OpenJDK installation directory.
- Launch G. Projector with the correct Java 11 path specified.