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adding a layout manager to JScrollPane

is there some specific restriction when adding a layout manager to JScrollPane??

i have used the following, as I am creating a simple component to add to a more complicated GridBag system:

JScrollPane memoryGroup = new JScrollPane();
memoryGroup.setLayout(new GridLayout (numMemoryLocation+1,1));

but i get the following run-time error: - any idea what I am doing wrong??

Exception in thread "main" java.lang.ClassCastException: layout of JScrollPane must be a ScrollPaneLayout
at javax.swing.JScrollPane.setLayout(JScrollPane.java:404)
at InterpreterGUI.createMemory(InterpreterGUI.java:469)
at InterpreterGUI.createMainPanel(InterpreterGUI.java:183)
at InterpreterGUI.<init>(InterpreterGUI.java:28)
at InterpreterMain.main(InterpreterMain.java:19)

CEHJ

You should set your GridBag layout on a JPanel and add that to the scroll pane.

need_help_pls

ASKER

i want to be able to layout my Scrollpane using something simple like GridLayout cos im returning this Scrollpanel as a component to be included in another panel which is laid out using gridbag...
is there some reason that I should not be able to set the layout of a scrollpane to gridLayout??? or flowLayout maybe?? or am i just making some stupid error with the above code that i cant spot??

need_help_pls

ASKER

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CEHJ

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apocalypso79

Hi,

You can set the layout of JScrollPane using the ScrollPaneLayout class (or a subclass of it). All the other standard Layouts won't work.

Reading the documentation on the sun site should allow you to set a grid-bag like layout (though it'll be some work)

I'm not sure it's necessary though. Think the JPanel solution might suffice.

need_help_pls

ASKER

thanks... makes life easier alright and does the trick!!!

cheers : )