I recently installed Spring boot on Ubuntu. When I run spring I get the following warning:
The JRE you are running Eclipse with appears to not be a JDK.
Spring Boot Live hovers will not work with a plain JRE.
The JRE you are running Eclipse with is: /usr/lib/jvm/java-11/openjdk-amd64
How can I get rid of this warning? Eclipse clearly points to the right JDK.
Even though the JRE path contained the letters JDK, on my system (Ubuntu 18.10) the JDK was not installed. Try:
sudo apt-get install openjdk-11-jdk openjdk-11-demo openjdk-11-doc openjdk-11-jre-headless openjdk-11-source
Please check this https://www.matsim.org/docs/devguide/eclipse/jdk
If no JDK is used for Eclipse, change it:
Quit Eclipse if it is running
Go to the Eclipse installation directory and open the file eclipse.ini in a text editor.
Search for the line -vmargs
Before the line -vmargs, add two lines:
On the first line, write -vm
On the second line, write the path to your JDK installation (usually something like: C:\Program Files\Java\jdk1.6.0_31\bin\javaw.exe on Windows
/Library/Java/JavaVirtualMachines/adoptopenjdk-11.jdk/Contents/MacOS/libjli.dylib on MacOS)
You can define the JRE/JDK on the Run/Debug Java Application config (if that is the way you are starting up your Spring Boot app):
Run/Debug -> Java Application -> JRE tab -> Alternate JRE
This would override any other default/IDE JRE settings.
The message is saying that Elipse is launched with a JRE instead of a JDK installation. Edit your elipse.ini to point the your JDK installation: For example, on iOS you should replace the line
/Users/user/.p2/pool/plugins/org.eclipse.justj.openjdk.hotspot.jre.full.macosx.x86_64_14.0.2.v20200815-0932/jre/lib/libjli.dylib
with
/Library/Java/JavaVirtualMachines/jdk-11.0.2.jdk/Contents/MacOS/libjli.dylib