52 lines
1021 B
Java
52 lines
1021 B
Java
// patterns/CommandPattern2.java
|
|
// ©2015 MindView LLC: see Copyright.txt
|
|
// Using the Runnable functional interface
|
|
import java.util.*;
|
|
|
|
class Command2 {
|
|
public Runnable execute;
|
|
}
|
|
|
|
class Hello2 extends Command2 {
|
|
Hello2() {
|
|
execute = () -> System.out.print("Hello ");
|
|
}
|
|
}
|
|
|
|
class World2 extends Command2 {
|
|
World2() {
|
|
execute = () -> System.out.print("World! ");
|
|
}
|
|
}
|
|
|
|
class IAm2 extends Command2 {
|
|
IAm2() {
|
|
execute = () ->
|
|
System.out.print("I'm the command pattern!");
|
|
}
|
|
}
|
|
|
|
class Macro2 extends Command2 {
|
|
private List<Command2> commands =
|
|
new ArrayList<>();
|
|
public void add(Command2 c) { commands.add(c); }
|
|
Macro2() {
|
|
execute = () -> {
|
|
for(Command2 c: commands) c.execute.run();
|
|
};
|
|
}
|
|
}
|
|
|
|
public class CommandPattern2 {
|
|
public static void main(String args[]) {
|
|
Macro2 macro = new Macro2();
|
|
macro.add(new Hello2());
|
|
macro.add(new World2());
|
|
macro.add(new IAm2());
|
|
macro.execute.run();
|
|
}
|
|
}
|
|
/* Output:
|
|
Hello World! I'm the command pattern!
|
|
*/
|