JSpinner decimal input

[David Garratt]

Is it possible to configure a JSpinner so that it will allow me to format a field for input of a value with 3 decimal places. I have tried several ways some of which display 0.000 etc but when I exit the field the value to the right if the decimal point reset back to .000

Some posts imply that a spinner can only handle integers. If so what would the best alternative be ?

Thanks in advance

Dave

[Craig Wood]

import java.awt.*;
import java.text.DecimalFormat;
import javax.swing.*;
 
public class DecimalSpinner
{
    private JPanel getSpinnerPanel()
    {
        double min = 0.000;
        double value = 0.707;
        double max = 1.000;
        double stepSize = 0.001;
        SpinnerNumberModel model = new SpinnerNumberModel(value, min, max, stepSize);
        JSpinner spinner = new JSpinner(model);
        JSpinner.NumberEditor editor = (JSpinner.NumberEditor)spinner.getEditor();
        DecimalFormat format = editor.getFormat();
        format.setMinimumFractionDigits(3);
        editor.getTextField().setHorizontalAlignment(SwingConstants.CENTER);
        Dimension d = spinner.getPreferredSize();
        d.width = 85;
        spinner.setPreferredSize(d);
        JPanel panel = new JPanel();
        panel.add(spinner);
        return panel;
    }
 
    private JPanel getSouthPanel()
    {
        JTextField tf = new JTextField(12);
        JPanel panel = new JPanel();
        panel.add(tf);
        return panel;
    }
 
    public static void main(String[] args)
    {
        DecimalSpinner decimalSpinner = new DecimalSpinner();
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(decimalSpinner.getSpinnerPanel(), "North");
        f.getContentPane().add(decimalSpinner.getSouthPanel(), "South");
        f.setSize(240,175);
        f.setLocationRelativeTo(null);
        f.setVisible(true);
    }
}

[David Garratt]

Wow - thanks for the example - just what I needed.