Java - add text to button's text arraylist

Question

I am assigning several buttons to a gridpane. Each button has a number as its text. I created an arrayList numbers and add numbers to it. I use collections to shuffle the numbers (I want to have a random number in each button everytime I run the program). Then I add a number to each button text using this arrayList.

I want each button to have a different number. However, right now each button in 1 column have the same number.

Any suggestions on how to fix this issue will be greatly appreciated (random assignment of the text of button).

This is my code:

Button[][] b= new Button[2][2];
List<Integer> n = new ArrayList<>();

    for(int i=0; i <2; i++){
        for(int j=0; j <2; j++){
            b[i][j] = new Button(String.valueOf(n.get(i)));
            pane.add(button[i][j], i, j);
        }
    }

Eran · Accepted Answer · 2015-11-22 14:59:17Z

1

With numbers.get(i) you are only accessing the first 4 numbers in your ArrayList, since i iterates from 0 to 3.

Change

b[i][j] = new Button(String.valueOf(numbers.get(i)));

to

b[i][j] = new Button(String.valueOf(n.get(i*4+j)));

Edit :

Note that you should use the n ArrayList, Not numbers (which I have no idea what it contains).

edited Nov 22, 2015 at 14:59

answered Nov 22, 2015 at 14:43

Eran

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1 Comment

BeginnerHelp Over a year ago

It works I had an error when I typed it in my code. Thank you

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