Eclipse: export project such that Windows and Mac can both run it (SWT)

 [root@localhost aimin]# java -jar TASTS.jar
Exception in thread "main" java.lang.UnsatisfiedLinkError: Could not load SWT library. Reasons:
    no swt-win32-4930r7 in java.library.path
    no swt-win32 in java.library.path
    Can't load library: /root/.swt/lib/linux/x86_64/libswt-win32-4930r7.so
    Can't load library: /root/.swt/lib/linux/x86_64/libswt-win32.so

    at org.eclipse.swt.internal.Library.loadLibrary(Library.java:344)
    at org.eclipse.swt.internal.Library.loadLibrary(Library.java:256)
    at org.eclipse.swt.internal.C.<clinit>(C.java:19)
    at org.eclipse.swt.widgets.Display.<clinit>(Display.java:145)
    at MainForm.main(MainForm.java:10)
[root@localhost aimin]#
--------------------

[root@localhost aimin]# java -jar TASTS-linux64.jar
Exception in thread "main" java.lang.UnsatisfiedLinkError: Could not load SWT library. Reasons:
    no swt-pi4-gtk-4934r6 in java.library.path
    no swt-pi4-gtk in java.library.path
    Can't load library: /root/.swt/lib/linux/x86_64/libswt-pi4-gtk-4934r6.so
    Can't load library: /root/.swt/lib/linux/x86_64/libswt-pi4-gtk.so

    at org.eclipse.swt.internal.Library.loadLibrary(Library.java:342)
    at org.eclipse.swt.internal.Library.loadLibrary(Library.java:256)
    at org.eclipse.swt.internal.gtk.OS.<clinit>(OS.java:90)
    at org.eclipse.swt.internal.Converter.wcsToMbcs(Converter.java:209)
    at org.eclipse.swt.internal.Converter.wcsToMbcs(Converter.java:155)
    at org.eclipse.swt.widgets.Display.<clinit>(Display.java:164)
    at MainForm.main(MainForm.java:10)
-----------------------

[root@localhost aimin]# ls /root/.swt/lib/linux/x86_64/
libswt-gtk-4934r6.so  libswt-pi3-gtk-4934r6.so

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You appear to be running a SWT application. On macOS you must specify the -XstartOnFirstThread option when running the jar to run SWT correctly:

jar -XstartOnFirstThread -jar xxxx.jar

SWT applications also have a native library which is different for each platform.

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You have to add the correct SWT.jar to the classpath. You can download them here. (https://www.eclipse.org/swt/)

If you are deploying for Windows, you will have to bundle the swt jar for Windows (either 32bit or 64bit depending on the system).

If you want to create an application that runs on all platforms, have a look at this post:

Create cross platform Java SWT Application (https://stackoverflow.com/questions/2706222/create-cross-platform-java-swt-application/3204032#3204032)

---------------

REF

https://stackoverflow.com/questions/2706222/create-cross-platform-java-swt-application/3204032#3204032

https://stackoverflow.com/questions/16567936/swt-running-an-application-developed-on-osx-in-windows

https://stackoverflow.com/questions/42777000/eclipse-export-project-such-that-windows-and-mac-can-both-run-it

 https://stackoverflow.com/questions/3959556/problems-with-loading-resources-during-execution

http://mchr3k.github.io/swtjar/