Question : How can I sign certificate request using java.security or Bouncycastle programmatically?

I have created a certificate request using BouncyCastle API, but I have not found a way, how can I sign this request and get certificate programmatically?

PKI is self made, root CA is self-signed

Answer : How can I sign certificate request using java.security or Bouncycastle programmatically?

With modification, possibly this is the one to follow:

http://www.java2s.com/Tutorial/Java/0490__Security/CreatingaCertificatefromaCertificationRequest.htm