Design Pattern Explained

The Command Pattern:

encapsulates a request as an object, thereby letting you parameterize other objects with different requests, queue or log requests, and support undoable operations

public interface Command {
public void execute();
}

public class LightOnCommand implements Command {
Light light;

public LightOnCommand(Light light) {
this.light = light;
}

public void execute() {
light.on();
}
}

public class RemoteControl {
Command slot;

public RemoteControl() {}

public void setCommand(Command slot) {
this.slot = slot;
}

public void buttonPressed() {
slot.execute();
}
}

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