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.