Does Processing 3 have class declarations? - processing

Question

Our school project has us make a game using Processing 3. After some studying with the language, our team is pretty confident we can work with the project, though we do have certain reservations of the chosen language.
However, there is one major question we are wondering and could not find an answer. In C++ and many others, when you create a new class in a new file you also create a header file you can include. Does Processing 3 have something similar? I know you can "include" files by adding more tabs, which is still weird but whatever. We would like to have some sort of declarations in advance so we can comment/describe classes and their methods, rather than force each member go through lots of code to find the proper point.
In short, we want to be able to do something like this:
Example.pde
class Example {
//Description
Example();
//Description
void doSomething(int variable);
}
//Other team members don't have to worry past this,
//as they have already seen the public interface
Example::Example()
{
//Constructor
}
void Example::doSomething(int variable)
{
//Function
}
Or do we have to always to like this:
Example.pde
class Example {
//Description
Example()
{
//Constructor
}
//Description
void doSomething(int variable)
{
//Function
}
}

Answer 1

Processing is written in Java, so you can only do things that Java supports. Java does not support header files, so no, you can't use header files in Processing.
However, it sounds like what you're really looking for is an interface.
interface Example {
void doSomething(int variable);
}
class MyExample implements Example{
public MyExample(){
//Constructor
}
void doSomething(int variable){
//Function
}
}
With this, you would only need to show other team members the interface, not the class. As long as they program to the interface, they don't need to ever see the class implementation.
More info on interfaces can be found in the Processing reference.