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NSThread.isMainThread [message #630477]

Sun, 03 October 2010 02:40

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

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

Mon, 04 October 2010 01:06

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

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

Fri, 11 November 2011 03:32

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.

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Re: NSThread.isMainThread [message #756208 is a reply to message #756139]

Fri, 11 November 2011 08:37

Lakshmi Shanmugam
Messages: 271
Registered: July 2009
Location: India

Senior Member

On Mac, you need to launch the SWT application with the -XstartOnFirstThread VM option.

Lakshmi P Shanmugam

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