[ -x /usr/lib/jvm/jre/bin/java ] && {
   JAVA_HOME=/usr/lib/jvm/jre
   PATH=$PATH:/usr/lib/jvm/jre/bin
}
[ -x /usr/lib/jvm/jdk/bin/javac ] && {
   JAVA_HOME=/usr/lib/jvm/jdk
   PATH=$PATH:/usr/lib/jvm/jdk/bin
}
[ "$JAVA_HOME" ] && export JAVA_HOME PATH