The format of the private key being imported. The available options are PKCS12 and PEM formats. A PEM formatted file may only contain one private key entry and an error occurs if it contains more than one private key. If a PKCS12 formatted file contains more than one private key, everything after the first key is ignored.
After the private key is imported to the current key store, its password will be set to the password of the key store if the current key store is a JKS type key store.