48 lines
938 B
Java
48 lines
938 B
Java
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//: patterns/CommandPattern2.java
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// Using the Runnable functional interface
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import java.util.*;
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class Command2 {
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public Runnable execute;
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}
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class Hello2 extends Command2 {
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Hello2() {
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execute = () -> System.out.print("Hello ");
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}
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}
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class World2 extends Command2 {
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World2() {
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execute = () -> System.out.print("World! ");
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}
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}
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class IAm2 extends Command2 {
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IAm2() {
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execute = () ->
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System.out.print("I'm the command pattern!");
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}
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}
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class Macro2 extends Command2 {
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private List<Command2> commands =
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new ArrayList<>();
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public void add(Command2 c) { commands.add(c); }
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Macro2() {
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execute = () -> {
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for(Command2 c: commands) c.execute.run();
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};
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}
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}
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public class CommandPattern2 {
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public static void main(String args[]) {
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Macro2 macro = new Macro2();
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macro.add(new Hello2());
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macro.add(new World2());
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macro.add(new IAm2());
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macro.execute.run();
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}
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} ///:~
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