Command Pattern with lambda

CommandSample3.java

package gof.command;

import java.util.Stack;

class CommandSample3 {

    ////////////////////
    // Command
    ////////////////////
    abstract public static class Command {
        public void setReceiver(Receiver receiver) {
        }

        public abstract void execute();
    }

    @FunctionalInterface
    public interface Executor {
        void run();
    }

    public static class Data1 extends Command {
        protected Receiver receiver;

        private String str1 = "Suzuki";
        private String str2 = "Ichiro";

        public void setReceiver(Receiver receiver) {
            this.receiver = receiver;
        }

        public void execute() {
            receiver.action( () -> System.out.println(str1 + " " + str2));
        }
    }

    public static class Data2 extends Command {
        protected Receiver receiver;

        private String str = "Jonney";

        public void setReceiver(Receiver receiver) {
            this.receiver = receiver;
        }

        public void execute() {
            receiver.action(() -> System.out.println(str));
        }
    }

    ////////////////////
    // Receiver
    ////////////////////
    public interface Receiver {
        void action(Executor executor);
    }

    public static class NamePrinter implements Receiver {
        public void action(Executor executor) {
            executor.run();
        }
    }

    ////////////////////
    // Invoker
    ////////////////////
    public static class Invoker {
        private Stack<Command> commands = new Stack<>();

        public void addCommand(Command command) {
            commands.push(command);
        }

        public void execute() {
            for (Command command : commands) {
                command.execute();
            }
        }
    }

    public static void main(String[] args) {
        NamePrinter name = new NamePrinter();
        Command data1, data2;
        Invoker invoker = new Invoker();

        data1 = new Data1();
        data1.setReceiver(name);
        data2 = new Data2();
        data2.setReceiver(name);

        invoker.addCommand(data1);
        invoker.addCommand(data2);

        invoker.execute();
    }
}