FULL PRODUCT VERSION :
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode)

java version "1.6.0-beta2"
Java(TM) SE Runtime Environment (build 1.6.0-beta2-b79)
Java HotSpot(TM) Client VM (build 1.6.0-beta2-b79, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Linux linux 2.6.11.4-20a-default #1 Wed Mar 23 21:52:37 UTC 2005 x86_64 x86_64 x86_64 GNU/Linux

Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
I'm trying to create a JSpinner control to enter a currency amount starting from £1.00. When I pass an initial value into the JSpinner constructor of 1.00 I receive a ClassCastException the first time I select the increment button on the spinner. However, when I pass an initial value of 1.01 the spinner works as expected. It would appear the system is interpreting the value '1.00' as a long integer instead of a double.

Consider the following JSpinner constructor invocation:

amountSpinner = new JSpinner(
                new SpinnerNumberModel(1.00, 0.00, Double.MAX_VALUE, 1.00));

The call to the JSpinner constructor above generates an error but the following SpinnerNumberModel(1.01, 0.00, Double.MAX_VALUE, 1.00) works ok!

P.S. Is there a more elegant way to set the format of the JFormattedTextField? Although you can pass a format pattern string into the constructor for the JSpinner.Editor I cannot work out how to obtain the required string from NumberFormat.getCurrencyInstance().

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. javac MainFrame.java
2. java MainFrame
3. Select the increment button on the JSpinner control and you should receive a ClassCastException immediately.

Then try the same procedure but using thevalues (1.01, 0.00, Double.MAX_VALUE, 1.00). When you press the increment button the spinner should work as expected.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The spinner should increment the currency amount displayed from £1.00 to £2.00.
ACTUAL -
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: java.lang.L
ong cannot be cast to java.lang.Double
        at java.lang.Double.compareTo(Double.java:32)
        at javax.swing.SpinnerNumberModel.incrValue(SpinnerNumberModel.java:332)

        at javax.swing.SpinnerNumberModel.getNextValue(SpinnerNumberModel.java:3
55)
        at javax.swing.JSpinner.getNextValue(JSpinner.java:347)
        at javax.swing.plaf.basic.BasicSpinnerUI$ArrowButtonHandler.actionPerfor
med(BasicSpinnerUI.java:629)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:19
82)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.jav
a:2305)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel
.java:377)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:232
)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonL
istener.java:236)
        at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:2
31)
        at java.awt.Component.processMouseEvent(Component.java:5979)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3284)
        at java.awt.Component.processEvent(Component.java:5744)
        at java.awt.Container.processEvent(Container.java:1984)
        at java.awt.Component.dispatchEventImpl(Component.java:4387)
        at java.awt.Container.dispatchEventImpl(Container.java:2042)
        at java.awt.Component.dispatchEvent(Component.java:4217)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4246
)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3910)

        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3840)
        at java.awt.Container.dispatchEventImpl(Container.java:2028)
        at java.awt.Window.dispatchEventImpl(Window.java:2297)
        at java.awt.Component.dispatchEvent(Component.java:4217)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre
ad.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.
java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)

        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)

        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

ERROR MESSAGES/STACK TRACES THAT OCCUR :
See the Actual Result information above.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.FlowLayout;
import java.text.NumberFormat;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.JSpinner;
import javax.swing.SpinnerNumberModel;
import javax.swing.text.DefaultFormatterFactory;
import javax.swing.text.NumberFormatter;

public class MainFrame extends JFrame
{
    private static MainFrame window;

    private JSpinner amountSpinner;
    
    public MainFrame()
    {
        super("Demo");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(300, 300);
        setLocationRelativeTo(null);
        layoutComponents();
        setVisible(true);
    }
    
    public static void main(String[] args)
    {
        window = new MainFrame();
    }
    
    private void layoutComponents()
    {
        setLayout(new FlowLayout());
        amountSpinner = new JSpinner(
                new SpinnerNumberModel(1.00f, 0.00f, Double.MAX_VALUE, 1.00f));
        JSpinner.NumberEditor amountEditor = new JSpinner.NumberEditor(
                amountSpinner);
        amountSpinner.setEditor(amountEditor);
        JFormattedTextField jftf2 = amountEditor.getTextField();
        jftf2.setFormatterFactory(new DefaultFormatterFactory(
                new NumberFormatter(NumberFormat.getCurrencyInstance())));
        jftf2.setColumns(8);
        add(amountSpinner);
    }
}
---------- END SOURCE ----------