Failed to find 'JAVA_HOME' environment variable. Try setting it manually

Issue

I'm trying to run a sample app on my android device with the following command :

sudo ionic cordova run android --device

I'm getting this error :

Failed to find 'JAVA_HOME' environment variable. Try setting it manually.
[ERROR] An error occurred while running subprocess cordova.

        cordova build android --device exited with exit code 1.

        Re-running this command with the --verbose flag may provide more information.

I already set the JAVA_HOME environment variable but that doesn't work .

~/Ionic/helloWorld$ echo $JAVA_HOME 
/usr/lib/jvm/java-12-openjdk-amd64

Any recommendations ?

Solution

Your $JAVA_HOME is pointing to the correct location. But the path should have $JAVA_HOME/bin directory and not $JAVA_HOME itself.

JAVA_HOME="/opt/jdk1.12.0"
export JAVA_HOME
PATH="$PATH:$JAVA_HOME/bin"

You should consider using the Oracle Java PPA instead. It usually does more than what a manual installation would do. You don't have to worry about setting up the environment variables either. That's what most people use.

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer

Try running java -version and javac -version to verify that the path is set.

Hope it helps.

Answered By - Saadat Sayem