How do I set a length in a jTextField where user can only type set
amount of characters?
Peter
Thanks

Whenever I load my applet using Microsofts VM, I get an error saying "class
Game cannot cannot be instantiated". What does this mean?
My applet consists of three classes in three different files. One of the
classes has 3 inner classes.

I have a vertical JSplitpane on the left side of a horizontal
JSplitpane.  When I move the mouse to the divider on the horizontal
splitpane the mouse changes to the resize icon, but the mouse does not
change to the resize icon when the mouse is on the divider for the

Hi i am trying to save a class that contains all my programs data so that a
it saves the current state to be loaded later.
i am using the follwing code to output my class to the output stream:
out.writeObject(graphData);

I need to modify any given column's header in my JTable. I couldn't
find a way of doing this, so I attempted to remove the necessary
TableColumn and re-add a TableColumn into the same position. The
problem I'm having is that it adds the TableColumn to the end of the

Hi...
I get the following error when i try to compile my java swing program
error:
CykelProgram_GUI.java [259:1] cannot resolve symbol

  This is my question, in a MVC application, which of the three
components in the triad is responsible of saving the state
of a model object permanently (for example, to a database, to
a XML file, etc...). The model object itself ? Or do I have

I'm using tabs for different 'modes' of operation. What I need to know is
how to 'listen' for when a tab is selected.
The Tutorial on JTabbedPanes makes no mention of it, only that the keyboard
and mouse listeners for changing a tab have been taken care of for us when

I'm new to GUI programming ...
I want to show a property window, when you click a certain button in the
main screen. While the window is popped up, it should be disallowed to click
the main screen.  When you click OK in the property Window, this property

I have written a program that draws a simple traffic light that can
switch between displaying red, yellow or green.  I've implemented it
by creating a single button, which attempts to change the color to
yellow, pause for DELAY miliseconds, and then change to red.

How can i make a Combo box (JComboBox) display a custom control as
popup.   I want to show a Jtable instead of a JList.
Thanks.
Paolo.

does anybody known a special icon for Drag&Drop?
thank you very much for each answer!!
regards,
Joana

I am using the j2sdk 1.402_03 on linux and I'm trying to use FileDialog but
I keep getting the following compile-time errors:
Found 3 semantic errors compiling "A5/A5.java":
   22.     FileDialog fd = new FileDialog( new Frame(), "Choose input file", FileDialog.LOAD );

i've written a plugin for eclipse that provides a tableview,
reading a csvfile.
til now the csvfile had always the format =
String|String

I'm having a problem with JSpinner and looking for some help.  I create
three JSpinners:
(1) SpinnerModel model = new SpinnerNumberModel(1.010, 1.000, 1.199, 0.001);
(2) SpinnerModel model = new SpinnerNumberModel(1.010, 0.999, 1.199, 0.001);