Using keytool, create a random key pair:
keytool -genkeypair -alias boguscert -storepass storePassword -keypass secretPassword -keystore emptyStore.keystore -dname "CN=Developer, OU=Department, O=Company, L=City, ST=State, C=CA"
then delete it
keytool -delete -alias boguscert -storepass storePassword -keystore emptyStore.keystore
review its contents:
$ keytool -list -keystore emptyStore.keystore -storepass storePassword
Keystore type: JKS
Keystore provider: SUN
Your keystore contains 0 entries