在Swing中可以将JTextField配置为仅接受数字吗？ [重复]

import javax.swing.*;

class NumberChooser {

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                SpinnerNumberModel numberModel = new SpinnerNumberModel(
                    new Integer(15), // value
                    new Integer(10), // min
                    new Integer(30), // max
                    new Integer(1) // step
                    );
                JSpinner numberChooser = new JSpinner(numberModel);
                JOptionPane.showMessageDialog(null, numberChooser);
                System.out.println(\"Number: \" + numberChooser.getValue());
            }
        });
    }
}

public class NumericDocument extends PlainDocument

JTextField numericTextOnlyField = new JTextField(new NumericDocument())