// patterns/TemplateMethod.java

// (c)2016 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://mindviewinc.com/Books/OnJava/ for more book information.

// Simple demonstration of Template Method

import java.util.stream.*;

abstract class ApplicationFramework {

public ApplicationFramework() {

templateMethod();

}

abstract void customize1();

abstract void customize2();

// "private" means automatically "final":

private void templateMethod() {

IntStream.range(0, 5).forEach(

n -> { customize1(); customize2(); });

}

}

// Create a new "application":

class MyApp extends ApplicationFramework {

@Override

void customize1() {

System.out.print("Hello ");

}

@Override

void customize2() {

System.out.println("World!");

}

}

public class TemplateMethod {

public static void main(String[] args) {

new MyApp();

}

}

/* Output:

Hello World!

Hello World!

Hello World!

Hello World!

Hello World!

*/