Eclipse Community Forums: Standard Widget Toolkit (SWT)

Home » Eclipse Projects » Standard Widget Toolkit (SWT) » NSThread.isMainThread(isMainThread returns false for main thread)

Show: Today's Messages :: Show Polls :: Message Navigator

NSThread.isMainThread [message #630477]

Sun, 03 October 2010 06:40

Ozzie

Messages: 1
Registered: July 2009

Junior Member

Hi,

I am an experienced win32 developer but very new to MACOS. I am trying to create a very simple SWT app to learn MACOS and I am stumped at the very start. I have the following code;

public static void main(String[] args) {
    if (NSThread.isMainThread()) {
        System.out.println("BEING MAIN THREAD");
    } else {
        System.out.println("NOT IN MAIN THREAD");
   }
}

This code prints "NOT IN MAIN THREAD". Any ideas why? What am I missing. If I run it in the debugger it's definitely the main (and only) thread.

Thanks for your help
Mark

Report message to a moderator

Re: NSThread.isMainThread [message #630550 is a reply to message #630477]

Mon, 04 October 2010 05:06

Prakash G.R.

Messages: 621
Registered: July 2009

Senior Member

On 03/10/10 12:10 PM, Ozzie wrote:
> I am an experienced win32 developer but very new to MACOS. I am trying
> to create a very simple SWT app to learn MACOS and I am stumped at the
> very start. I have the following code;
>
>
> public static void main(String[] args) {
> if (NSThread.isMainThread()) {
> System.out.println("BEING MAIN THREAD");
> } else {
> System.out.println("NOT IN MAIN THREAD");
> }
> }
>
>
> This code prints "NOT IN MAIN THREAD". Any ideas why? What am I missing.
> If I run it in the debugger it's definitely the main (and only) thread.

It prints "BEING MAIN THREAD" for me. BTW, if you want to learn MacOS
why are you using SWT? You could try XCode and Cocoa directly

--
- Prakash
Platform UI Team, IBM

www.eclipse-tips.com

Report message to a moderator

Re: NSThread.isMainThread [message #756139 is a reply to message #630550]

Fri, 11 November 2011 08:32

Maksym Bykovskyy

Messages: 3
Registered: July 2010

Junior Member

Answering a question with another question is not a very useful response! I see a similar result. I have an SWT application which runs fine on Windows and Unix but on Mac it complains about Display not being created on the main thread.

Report message to a moderator