PEM -> JKS

 openssl x509 -in client.pem -out client.der -outform DER
 keytool -storepass changeit -keystore client.jks -importcert -alias client -file client.der -trustcacerts

By default java will inline the final member variable

When you changed a final String in a java source file and it's called by a method from a jar, the change won't be picked up.