Resolution
Use the env.JAVA_HOME environment variable to specify the JDK to use as shown in the Pipeline snippet below:
node { jdk = tool name: 'JDK17' env.JAVA_HOME = "${jdk}" echo "jdk installation path is: ${jdk}" // next 2 are equivalents sh "${jdk}/bin/java -version" // note that simple quote strings are not evaluated by Groovy // substitution is done by shell script using environment sh '$JAVA_HOME/bin/java -version' }