I want to integrate a payment gateway into a java project. I need some knowledge about the payment gateway and its types, etc. Can any body give me some idea about this.
Check for the Authorize.Net api for JAVA. It has several integration methods that you can implement in your JAVA project.
All you need is an Authorize.Net SDK, visit http://developer.authorize.net/downloads/ to download the SDK
For sample codes, visit http://developer.authorize.net/downloads/samplecode/
You can also check with