// patterns/CommandPattern.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.

import java.util.*;

class Command {

public final String msg;

public Command(String msg) {

this.msg = msg;

}

}

public class CommandPattern {

public static void show(Command cmd) {

System.out.println(cmd.msg);

}

public static void main(String[] args) {

show(new Command("First Command"));

show(new Command("Second Command"));

}

}

/* Output:

First Command

Second Command

*/