Digital self-signed certification update expiry date

I have a self-signed digital certificate created using java keytool co开发者_开发问答mmand. Can I update only the expiry date of the keystore file, without creating new keystore?

Any help?

You can't change the validity period without resigning the certificate. However, you don't have to create a new keystore. Just sign the certificate again with new expiration date and replace it in the keystore.