Final answer:
A Java keystore is used to store cryptographic keys and certificates for secure communication in Java applications. A truststore is a Java keystore file that stores trusted certificates to verify the identity of other parties.
Step-by-step explanation:
A Java keystore is a file that is used to store cryptographic keys and certificates. It is used for secure communication in Java applications. The keystore contains private keys, public keys, and certificates that are used for encryption, authentication, and integrity.
A truststore, on the other hand, is a Java keystore file that stores trusted certificates. These certificates are used to verify the identity of other parties in a secure communication. When a Java application receives a signed certificate from another party, it can check if the certificate is trusted by looking up the trusted certificates in the truststore.