ListernerCommand.java

package Solutions;

interface ActionListenerCommand {

	public void execute();

}

class ActionOpen implements ActionListenerCommand {

	private Document doc;

	public ActionOpen(Document doc) {
		this.doc = doc;
	}

	@Override
	public void execute() {
		doc.open();
	}

}

class ActionSave implements ActionListenerCommand {

	private Document doc;

	public ActionSave(Document doc) {
		this.doc = doc;
	}

	@Override
	public void execute() {
		doc.save();
	}

}

class Document {

	public void open() {
		System.out.println("Document Opened");
	}

	public void save() {
		System.out.println("Document Saved");
	}

}

class MenuOptions {

	private ActionListenerCommand openCommand;
	private ActionListenerCommand saveCommand;

	public MenuOptions(ActionListenerCommand open, ActionListenerCommand save) {
		this.openCommand = open;
		this.saveCommand = save;
	}

	public void clickOpen() {
		openCommand.execute();
	}

	public void clickSave() {
		saveCommand.execute();
	}

}

public class ListernerCommand {

	public static void main(String[] args) {
		Document doc = new Document();

		ActionListenerCommand clickOpen = new ActionOpen(doc);
		ActionListenerCommand clickSave = new ActionSave(doc);

		MenuOptions menu = new MenuOptions(clickOpen, clickSave);

		menu.clickOpen();
		menu.clickSave();

	}

}