Does someone have a source code for a simple Edgeville smelter script?

Looking for something like the below script where "get" methods and "this" are used. (For learning purposes)

 

Thanks!

@Prolax Key word "this" is to specify context. Can also be used to specify the current class context if passing as a parameter

private int value = 0;

public void setValue(int value) {
	this.value = value;
}