How to switch between two numbers by pressing button?

Question

I need to switch between two numbers by pressing "q" .

First press:

number = 1;

Second press:

number = 2;

Third press:

number = 1;

Fourth press:

number = 2;

etc

Got method and variable :

 private static int counter = 0;

 private int switchNumbers() {
        if (Gdx.input.isKeyJustPressed(Input.Keys.Q)){
            counter = 1;
        }
        if (counter == 1 && Gdx.input.isKeyJustPressed(Input.Keys.Q)){
            counter = 2;
        }
        if (counter == 2 && Gdx.input.isKeyJustPressed(Input.Keys.Q)){
            counter = 1;
        }

      return counter;
    }

variable counter always equals 1.

How can achieve it (switching numbers) ?

Answer 1

you can check what is the current value of counter if its 1 then put 2 else put 1:

by a ternary opeator :

private static int counter = 0;

private int switchNumbers() {
    if (Gdx.input.isKeyJustPressed(Input.Keys.Q)) {
        counter = counter == 1 ? 2 : 1;
    }
    return counter;
}

or simple using if-else :

private int switchNumbers() {
    if (Gdx.input.isKeyJustPressed(Input.Keys.Q)) {
        if(counter == 1) {
            counter = 2;
        } else {
            counter = 1;
        }
    }
    return counter;
}