I created Java keystore programmatically of type jks (i.e. default type). It is initially empty so I created a DSA certificate.
keytool -genkey -alias
keytool -list -v -alias myCert -storepass 123456 -keystore file.jks
or
keytool -list -rfc -alias myCert -storepass 123456 -keystore file.jks
as noted in
keytool -help