org.eclipse.swt.SWTException: Invalid thread access

**int80** · 07-18-2008, 03:21 PM

I've got three classes, two have methods in them. Class one renders widgets and shell for a login screen and the method returns a three element array. Class two has a method in it that is called after Class ones' method has return the array.

And it looks like this:

Java Code:

  public static void main(String args[]) {
	
	String[] loginDetails = new String[3]; //create array
	
	LoginWidgets login = new LoginWidgets(); //create object
        DetailsScreen details1 = new DetailsScreen();// ''
	
	
	loginDetails = login.RenderWidgets(); //Get username/password/database returned by method in first class
	details1.DetailsScreenRender(); //call method in second class

It's just, when I run this, it comes up with this error:

Java Code:

Exception in thread "main" org.eclipse.swt.SWTException: Invalid thread access
	at org.eclipse.swt.SWT.error(Unknown Source)
	at org.eclipse.swt.SWT.error(Unknown Source)
	at org.eclipse.swt.SWT.error(Unknown Source)
	at org.eclipse.swt.widgets.Display.checkDisplay(Unknown Source)
	at org.eclipse.swt.widgets.Display.create(Unknown Source)
	at org.eclipse.swt.graphics.Device.<init>(Unknown Source)
	at org.eclipse.swt.widgets.Display.<init>(Unknown Source)
	at org.eclipse.swt.widgets.Display.<init>(Unknown Source)
	at Practise.LoginWidgets.<init>(LoginWidgets.java:11)
	at Practise.Simian.main(Simian.java:17)

And it says the problem is with this line:

DetailsScreen details1 = new DetailsScreen();

I'm really not sure what's going on. Thanks in advance for anyone that knows what's going on!!

**Jaanavee** · 08-14-2009, 08:50 AM

I have same problem... I have class in some package and I am accessing it in another class that time it shows this error.....

Exception in thread "main" org.eclipse.swt.SWTException: Invalid thread access
at org.eclipse.swt.SWT.error(Unknown Source)
at org.eclipse.swt.SWT.error(Unknown Source)
at org.eclipse.swt.SWT.error(Unknown Source)
at org.eclipse.swt.widgets.Display.checkDisplay(Unkno wn Source)
at org.eclipse.swt.widgets.Display.create(Unknown Source)
at org.eclipse.swt.graphics.Device.<init>(Unknown Source)
at org.eclipse.swt.widgets.Display.<init>(Unknown Source)
at org.eclipse.swt.widgets.Display.<init>(Unknown Source)
at internalframes.ScrollableTable.<init>(ScrollableTa ble.java:31)
at MainFrame.createFrame(MainFrame.java:184)
at MainFrame$4.handleEvent(MainFrame.java:77)
at org.eclipse.swt.widgets.EventTable.sendEvent(Unkno wn Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
at org.eclipse.swt.widgets.Control.WM_MENUSELECT(Unkn own Source)
at org.eclipse.swt.widgets.Control.windowProc(Unknown Source)
at org.eclipse.swt.widgets.Canvas.windowProc(Unknown Source)
at org.eclipse.swt.widgets.Decorations.windowProc(Unk nown Source)
at org.eclipse.swt.widgets.Shell.windowProc(Unknown Source)
at org.eclipse.swt.widgets.Display.windowProc(Unknown Source)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(N ative Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(Un known Source)
at org.eclipse.swt.widgets.Shell.callWindowProc(Unkno wn Source)
at org.eclipse.swt.widgets.Control.windowProc(Unknown Source)
at org.eclipse.swt.widgets.Canvas.windowProc(Unknown Source)
at org.eclipse.swt.widgets.Decorations.windowProc(Unk nown Source)
at org.eclipse.swt.widgets.Shell.windowProc(Unknown Source)
at org.eclipse.swt.widgets.Display.windowProc(Unknown Source)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(N ative Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(Un known Source)
at org.eclipse.swt.widgets.Shell.callWindowProc(Unkno wn Source)
at org.eclipse.swt.widgets.Control.windowProc(Unknown Source)
at org.eclipse.swt.widgets.Canvas.windowProc(Unknown Source)
at org.eclipse.swt.widgets.Decorations.windowProc(Unk nown Source)
at org.eclipse.swt.widgets.Shell.windowProc(Unknown Source)
at org.eclipse.swt.widgets.Display.windowProc(Unknown Source)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW (Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage( Unknown Source)
at org.eclipse.swt.widgets.Display.readAndDispatch(Un known Source)
at MainFrame.<init>(MainFrame.java:163)
at MainFrame.main(MainFrame.java:16)

Please help.....Thanks in advance.....