// patterns/TemplateMethod.java

// (c)2021 MindView LLC: see Copyright.txt

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

// Visit http://OnJava8.com for more book information.

// Basic Template Method pattern.

import java.util.stream.*;

abstract class ApplicationFramework {

ApplicationFramework() {

templateMethod();

}

abstract void customize1(int n);

abstract void customize2(int n);

// "private" means automatically "final":

private void templateMethod() {

IntStream.range(0, 5).forEach(

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

}

}

// Create a new application:

class MyApp extends ApplicationFramework {

@Override void customize1(int n) {

System.out.print("customize1 " + n);

}

@Override void customize2(int n) {

System.out.println(" customize2 " + n);

}

}

public class TemplateMethod {

public static void main(String[] args) {

new MyApp();

}

}

/* Output:

customize1 0 customize2 0

customize1 1 customize2 1

customize1 2 customize2 2

customize1 3 customize2 3

customize1 4 customize2 4

*/