Java KeyStore
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A Java KeyStore (JKS) is a repository of security certificates, either Authorization certificates or Public key certificates - used for instance in SSL encryption.
In Oracle WebLogic Server, a file with extension jks serves as keystore.
The Java JDK maintains a CAC keystore in jre/lib/security/cacerts. JDKs provide a tool keytool [1] 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[2]