How to retrieve value changes made from a For Loop within it's own method in Android Studio?

First off: I'm pretty new to Android Studio and programming in general, so sorry if this seems blatantly obvious.

I have a for loop within my main activity that is used to randomly shuffle/reassign the values within an array at the beginning of every time the application is opened.

I was told that for loops in Android Studio could only exist within a method (after getting errors when it was placed without one), but by doing so the random shuffling of the array is not carried over to the rest of the click events that are outside of the method and it just continues to output the same originally assigned values of in the array.

int[] money = {1,10,5,2,20,500,50,100,1000000,5000,1000,50000,100000,500000,250000,10000};

int swap1;
int swap2;
int temp;

Random random = new Random();
void what(){
    for (int j=0;j<16;j+=1)
    {
        swap1 = random.nextInt(16);
        swap2 = random.nextInt(16);
        temp = money[swap1];
        money[swap1] = money[swap2];
        money[swap2] = temp;
    }
}

The click events that are using the values from this array are like this one:

 one.setOnClickListener(new View.OnClickListener() {
        public void onClick(View b) {

            one.setVisibility(View.INVISIBLE);
            counter++;
            money[0] = 0;

            Context one = getApplicationContext();
            CharSequence message1 = "$1";
            int duration = Toast.LENGTH_LONG; //this could also be a number
            final Toast one1 = Toast.makeText(one, message1, duration);
            one1.show();

            for (int x = 0; x < 16; x++) {
                sum += money[x];
            }
            banker = sum / 16;

            Context oney = getApplicationContext();
            CharSequence message1y = "The Banker offers you $" + banker + " for your case.";
            int durationy = Toast.LENGTH_LONG; //this could also be a number
            final Toast one1y = Toast.makeText(oney, message1y, durationy);
            one1y.show();




        }

    });

The aim was that if I were to click this button, the ideal outcome would be that this time, the money output was something like $500, and the next time I opened the application it would randomly shuffle and I might get a new value like $1.