I'm not sure I understand what you are looking for here. There are three broad things it might be from what you've said:
For the third one, you don't need to use Java, you can write in any language you want, as long as it can issue REST calls. There is an example chunk of code called the JRJC, but I generally don't bother with it because we get a lot of questions here about it where the answer comes down to "it will be far more simple if you did this yourself with a direct REST call instead of trying to wedge it through the JRJC"
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