如何在arraylist中添加JTextField中的数字？

Question

我第一次与swing合作，请帮忙。

//In this texfield should be an array of digits like this: 10, 5, 8, 1, 11
private JTextField  setATextField = new JTextField(10);
private JButton button = new JButton("Button");
//....
//....
public class UnionActionListener implements ActionListener {
    @Override
    public void actionPerformed(ActionEvent event) {
        ArrayList<Integer> setA = new ArrayList<>();
    }
}

如何在arraylist中添加此数字？ 它一定是这样的：

JTextField field = new JTextField("10, 5, 8, 1, 11", 10);
setA.get(0) = 10;
setA.get(1) = 5;
setA.get(2) = 8;
//......