Java Shell

Force Garbage Collection
Since JDK 7 you can use the JDK command tool ‘jcmd’ such as:

jcmd <pid> GC.run
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Install Java 8 to OpenShift DIY cartridge

$> cd ${OPENSHIFT_DATA_DIR}
$> wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" \
   http://download.oracle.com/otn-pub/java/jdk/8u51-b16/jdk-8u51-linux-i586.tar.gz
$> tar -zxf jdk-8u51-linux-i586.tar.gz
$> export JAVA_HOME="${OPENSHIFT_DATA_DIR}jdk1.8.0_51"
$> export PATH=$JAVA_HOME/bin:$PATH