SpreadSheet Demo available \demo\applets\SpreadSheet throws exceptions..

Steps to reproduce:
1. Launch the SpreadSheet demo applet.
2. On WinNT and Win98 when we click on some number cells and then when we do Applet- Reload and Restart ... exceptions thrown. (sometimes without cliking on the numbers and just selecting the menu items also produces the same effect)

3. On Solaris when we click on the "Example" title or on the Column names "A" "B" or "C" we get exceptions.
4. Also when we save we get java.io.NotSerializableException( Some other applets also show this behaviour)

We get java.lang.ArrayIndexOutOfBoundsException when we do the steps 1 and 2.
###@###.### 1999-07-28.


Reproducible with Kestrel "L" build too. The output on the screen is

For Windows NT:
J:\testexec\temp>appletviewer example1.html
Exception occurred during event dispatching:
java.lang.ArrayIndexOutOfBoundsException
        at SpreadSheet.mousePressed(SpreadSheet.java:332)
        at java.awt.Component.processMouseEvent(Component.java:3604)
        at java.awt.Component.processEvent(Component.java:3436)
        at java.awt.Container.processEvent(Container.java:1253)
        at java.awt.Component.dispatchEventImpl(Component.java:2524)
        at java.awt.Container.dispatchEventImpl(Container.java:1302)
        at java.awt.Component.dispatchEvent(Component.java:2438)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:302)
        at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:10
5)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:95)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:86)


On Solaris26 :

feature:/net/tapas/export0/jdk13l/solaris/bin% ./appletviewer ../demo/applets/SpreadSheet/example1.html
Warning: JIT compiler "sunwjit" not found. Will use interpreter.
Exception occurred during event dispatching:
java.lang.ArrayIndexOutOfBoundsException: -1
        at SpreadSheet.mousePressed(SpreadSheet.java:332)
        at java.awt.Component.processMouseEvent(Component.java:3586)
        at java.awt.Component.processEvent(Component.java:3418)
        at java.awt.Container.processEvent(Container.java:1253)
        at java.awt.Component.dispatchEventImpl(Component.java:2506)
        at java.awt.Container.dispatchEventImpl(Container.java:1302)
        at java.awt.Component.dispatchEvent(Component.java:2420)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:302)
        at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:105)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:95)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:86)


###@###.### 1999-07-29