Basic programming question

Question

I want to do small framework that it exposes 3 methods
Then, i want that "something" compile and run this code, but this code
doesn't have "main method".
how can i do that. May be including the main method "hide" or something.
thank you
Public class YYY implements XXX {
  public int method1(){
    System.out.println("this method1");
  public int method2() {
    System.out.println("this method2");
  public int method3() {
    System.out.println("this method3");
}

Answer 1

I want to do an application where developers "just" implement the methods that I want. for example readFile() , writefile() and closefile().
but I need one "start point" or main function, in order to "control" the program flow, where: I read the config file..., find a directory... open a file..., start threads..., and so on. All this function must be "hide" to developers. I whish that developers always implement the some "3 simple methods", complile and run it and they do not worry about the rest of the methods.
It is posible to do that ?
sorry for my english.