In [[Oracle WebLogic Server]], a file with extension ''jks'' serves as keystore.
The [[Java_(programming_language)|Java]] JDK maintains a CAC{{clarifyClarify|date=February 2012}} keystore in jre/lib/security/cacerts. JDKs provide a tool named ''keytool'' <ref>[http://java.sun.com/javase/6/docs/tooldocs/solaris/keytool.html keytool - Key and Certificate Management Tool]</ref> to manipulate the keystore. ''keytool'' has no functionality to extract the private key out of the keystore, but this is possible with a third-party tool jksExportKey<ref>[http://miteff.com/jksexportkey jksExportKey - A free tool for exporting private keys out of the keystore as standalone files]</ref>.
