How do I access one button from a 2D array of buttons? Java JSwing

Question

I am trying to create a grid of buttons. This is my code to create the grid (which works), but if I want to access a single button later on how would I go about doing that?

    for(int i = 1; i<= row; i++){
        for( int p=1; p<= col; p++){
           boardPanel.add(new JButton());   
        }
    }

Many Thanks

A Clements;

Hmm, any number of ways. You could save those buttons in an array and access them there. Or in an EvenListener, call getSource() on the Event to find the button that fired the event. It really boils down to how you want to access the button, i.e. what are your requirements? — markspace
– markspace, Commented Dec 3, 2015 at 17:49
Basically it's a minesweeper game. I see that with the actionlistener I need to at least call some form of button first. I just don't know what I could call from this e.g buttonName.addActionListener... — Alex Clements
– Alex Clements, Commented Dec 3, 2015 at 17:52

ewanc · Accepted Answer · 2015-12-03 18:05:03Z

1

From your question title I'm assuming that you want to be able to access these buttons from a 2d array, but in your code the button is not in an array. If you did something like the following:

JButton[][] buttons = new JButton[row][col];
for(int i = 1; i<= row; i++){
    for( int p=1; p<= col; p++){
       buttons[i][p] = new JButton();
       boardPanel.add(buttons[i][p]);   
    }
}

Then you are maintaining a 2d array that contains references to the buttons in your JPanel. So now you can access the buttons from the array like this:

buttons[i][j];

edited Dec 3, 2015 at 18:05

answered Dec 3, 2015 at 17:54

ewanc

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