43 lines
1.0 KiB
Java
43 lines
1.0 KiB
Java
// patterns/TemplateMethod.java
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// (c)2021 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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// Basic Template Method pattern.
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import java.util.stream.*;
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abstract class ApplicationFramework {
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ApplicationFramework() {
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templateMethod();
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}
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abstract void customize1(int n);
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abstract void customize2(int n);
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// "private" means automatically "final":
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private void templateMethod() {
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IntStream.range(0, 5).forEach(
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n -> { customize1(n); customize2(n); });
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}
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}
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// Create a new application:
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class MyApp extends ApplicationFramework {
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@Override void customize1(int n) {
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System.out.print("customize1 " + n);
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}
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@Override void customize2(int n) {
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System.out.println(" customize2 " + n);
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}
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}
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public class TemplateMethod {
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public static void main(String[] args) {
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new MyApp();
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}
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}
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/* Output:
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customize1 0 customize2 0
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customize1 1 customize2 1
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customize1 2 customize2 2
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customize1 3 customize2 3
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customize1 4 customize2 4
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*/
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