Behavioral -- Command

--- Command.java ---

package behavioral.command;

public interface Command {

void execute();

}

--- ConcreteCommand.java ---

package behavioral.command;

public class ConcreteCommand implements Command {

private Receiver myReceiver;

public ConcreteCommand(Receiver receiver) {
this.myReceiver = receiver;
}

public void execute() {
myReceiver.action();
}

}

--- Receiver.java ---

package behavioral.command;

public class Receiver {

public void action() {

}

}