GridLayout. Check the amount of cells used

After creating the grill with "GridLayout":

supper(new GridLayout(rows, column));

I will add to demand content in开发者_如何学JAVA each cell:

public void addButton(String name) {
 buttons = new JButton(name);
 add(buttons);
}

As I can I know the current number of cells used to keep a counter of addition and deletion?.

Thanks.

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You could check with Container.getComponentCount().