How to make a method change another method's return statement (boolean)

Marcel :

I want to write a method that changes the return statement of a different method. For example, I have 3 methods:

openCar
closeCar
isTheCarOpen:boolean

So if a user calls the method openCar and then calls the method isTheCarOpen it should return true.

    public void openCar() {
        System.out.println("Car has been opened");
    }

    public void closeCar() {
        System.out.println("Car has been closed");

    }

    public boolean isTheCarOpen() {
        return false;
    }

Federico klez Culloca :

You don't change the return statement. You change what the method returns. In your case, you want to have a boolean in the class representing the state of the door (let's call it doorOpened) and you set its value when you call the openCar and closeCar method.

class Car {
    private boolean doorOpened;

    public void openCar() {
        doorOpened = true;
        System.out.println("Car has been opened");
    }

    public void closeCar() {
        doorOpened = false;
        System.out.println("Car has been closed");
    }

    public boolean isTheCarOpen() {
        return doorOpened;
    }
}