Using Coroutines

Hey guys I'm in need of a little help here with using coroutines. I can find very little information on them on the internet.

How are they constructed? I have seen on the internet that they are defined as such.

Coroutine(java.lang.string producer, int x){
}

but when I do this it looks for a return type like a method.

I have also seen this.

Coroutine Producer=new Coroutine (int x, double y);

But this comes up as not recognized.

Also do I have to import a package to work with these coroutines? If so what is the package.

How would I pause one coroutine while I start another?

I know those are a lot of questions but I very much appreciate the help.

Please excuse my ignorance, but what exactly is a "Coroutine"? Is this part of standard Java? Part of a separate library? Please clarify this for the uninitiated.

A coroutine is basically a subroutine that allows multiple entry points, you don't have to start it at the beginning every time.

I am not sure if it is part of standard java or if it has to be imported. My professor will not help me at all.

Again, I don't know, but perhaps someone smarter than I can help out here. I thought that I've at least heard about all components of basic java even if I'm no expert in them, and I've never heard of this. Sorry I couldn't help more, but again, hopefully someone else will. Meanwhile, if you find any more information on this, please post it here.

Best of luck.

OK, coroutines don't exist in the basic Java libraries as an API (concept of subroutines doesn't exist either in Java... they're all methods). It has to be a third party library (which has to be imported) or a plugin. The only time have had to work with subroutines was with assembler or basic.

Luck,
CJSL