public void showImmoMenu() {
		//Menüoptionen
		final int NEW_HOUSE = 0;
		final int EDIT_HOUSE = 1;
		final int DELETE_HOUSE = 2;
		final int NEW_APPARTMENT = 3;
		final int EDIT_APPARTMENT = 4;
		final int DELETE_APPARTMENT = 5;
		final int BACK = 6;
		
		//Immobilienverwaltungsmenü
		Menu maklerMenu = new Menu("Immobilien-Verwaltung");
		maklerMenu.addEntry("Neues Haus anlegen", NEW_HOUSE);
		maklerMenu.addEntry("Haus bearbeiten", EDIT_HOUSE);
		maklerMenu.addEntry("Haus löschen", DELETE_HOUSE);
		
		maklerMenu.addEntry("Neue Wohnung anlegen", NEW_APPARTMENT);
		maklerMenu.addEntry("Wohnung bearbeiten", EDIT_APPARTMENT);
		maklerMenu.addEntry("Wohnung löschen", DELETE_APPARTMENT);
		
		maklerMenu.addEntry("Zurück zum Hauptmenü", BACK);
		
		//Verarbeite Eingabe
		while(true) {
			int response = maklerMenu.show();
			
			switch(response) {
				case NEW_HOUSE:
					newHouse();
					break;
				case EDIT_HOUSE:
					editHouse();
					break;
				case DELETE_HOUSE:
					deleteHouse();
					break;
				case NEW_APPARTMENT:
					newAppartment();
					break;
				case EDIT_APPARTMENT:
					editAppartment();
					break;
				case DELETE_APPARTMENT:
					deleteAppartment();
					break;
				case BACK:
					return;
			}
		}
	}