45 lines
999 B
Java
45 lines
999 B
Java
// patterns/TemplateMethod.java
|
|
// ©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!
|
|
*/
|