I want to make a https client in java which initially does not have any CA certs to trust. Since I don't want the JVM to use the default cacerts file I should make an empty trust store and point it to the JVM.
How can I make an empty trust store?
One possible solution I found is to import some random certificate into a newly created trust store with
keytool import and then delete the imported certificate from it. This leaves you with an empty key/trust store.
Unfortunately the JVM is not happy with an empty trust store and throws an exception upon that. So at least one certificate should be present there which could be any invalid or expired one in order to achieve the goal.