Why this hadn't been an issue for several years when I wrote an
maintained the app? I don't know.
Something must have changed in XCode's expectations sometime in the
recent past. Again, I haven't been working with java for a couple of
years.
I hope this information can be of use to others. Especially to all the
people new to java who are typing in example code, compiling, seeing
runtime failures, and not getting responses on the list.
Thanks,
Xi
On Jul 1, 2007, at 1:32 AM, Xi Golom wrote:
I haven't done any Java development for a few years, and am needing to
make some changes to a Java app last compiled a few versions of XCode
ago.
The last time this app, Procession, was built there were no compile
errors and the app launches and runs as expected.
With a newer XCode, however, the app will not launch (neither from
debugger, nor Finder, nor command line). Build process is OK.
A dialog is posed which reads 'Cannot launch Java application: the
main class "Procession" could not be loaded'.
Procession.java is compiled in the build process and targeted for the
app.
The main class, Procession, is public.
Here's what is sent to the terminal using JAVA_LAUNCHER_VERBOSE
[DmG4Ti:~] dm%
/CODE/Procession/build/Debug/Procession.app/Contents/MacOS/Procession
[JavaAppLauncher] adding to JNI library search path:
/CODE/Procession/build/Debug/Procession.app/Contents/Resources/Java:/
System/Library/PrivateFrameworks/JavaApplicationLauncher.framework/
Resources
[JavaAppLauncher] changing current directory to:
/CODE/Procession/build/Debug/Procession.app/..
[JavaAppLauncher] Application specified it needs VM version: 1.4+
[JavaAppLauncher] Will use Java VM version: 1.5.0
[JavaAppLauncher] VM option:
-Xbootclasspath/a:/System/Library/PrivateFrameworks/
JavaApplicationLauncher.framework/Resources/LauncherSupport.jar
[JavaAppLauncher] VM option:
-Djava.class.path=/CODE/Procession/build/Debug/Procession.app/
Contents/Resources/Java/Procession.jar
[JavaAppLauncher] VM option: -Dapple.laf.useScreenMenuBar=true
[JavaAppLauncher] Starting Java VM
[JavaAppLauncher] Entering java
[LaunchRunner] Main class Procession found via 'MainClass' key of
sub-dictionary 'Java' of Info.plist key
[LaunchRunner Error] The main class "Procession" could not be found.
[JavaAppLauncher Error] CallStaticVoidMethod() threw an exception
Exception in thread "main" java.lang.NullPointerException
at apple.launcher.LaunchRunner.run(LaunchRunner.java:85)
at apple.launcher.LaunchRunner.callMain(LaunchRunner.java:50)
at
apple.launcher.JavaApplicationLauncher.launch(JavaApplicationLauncher.j
ava:52)
What are the Java app differences between older and newer XCode
versions?
I tried starting a new project and copied the Procession source and
resources over to it with the same runtime error results.
What do I need to change to get a formerly working project to play
nicely with new XCode?
Stumped.
-Xi
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