How to create own Java launcher

Question

Hi, I need to create native launcher for Java in C, C++ or Objective-C. It doesn't matter, but C++ is preferred. I have Java application which access Keychain and I need to have my own process - not java or JavaStubApplication.
I have this code:
JavaVM *jvm = NULL;
JNIEnv *env = NULL;
jint err = JNI_OK;
JavaVMInitArgs vm_args;
JavaVMOption options[1];
options[0].optionString = "-Djava.class.path=LauncherTest.jar";
vm_args.version = JNIVERSION_14;
vm_args.nOptions = option_count;
// vm_args.options = options;
vm_args.ignoreUnrecognized = JNI_FALSE;
jclass startClass = NULL;
jmethodID mainMethod = NULL;
JNI_CreateJavaVM(&jvm, (void**)&env, &vm_args);
startClass = env->FindClass("launcherTest/Main");
mainMethod = env->GetStaticMethodID(startClass, "main", "([Ljava/lang/String;)V");
jobjectArray array = NULL;
jsize size = 0;
jobject init = env->NewStringUTF("");
jclass clsString = env->GetObjectClass(init);
array = env->NewObjectArray(size, clsString, init);
if (array != NULL) {
JavaVMAttachArgs attach_args;
attach_args.version = JNIVERSION_14;
attach_args.name ="LaunchThread";
attach_args.group = NULL;
err = jvm->AttachCurrentThread((void**)&env, &attach_args);
env->CallStaticVoidMethod(startClass, mainMethod, array);
err = jvm->DetachCurrentThread();
err = jvm->DestroyJavaVM();
This snip of code works until I don't have any java.awt in java application. When I start to use awt, i get this error:
2009-10-21 09:36:18.292 launcher[1170:a0f] Apple AWT Java VM was loaded on first thread -- can't start AWT.
21.10.2009 9:36:18 launchertest.Main main
SEVERE: null
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at launchertest.Main.main(Main.java:51)
Caused by: java.lang.InternalError: Can't start the AWT because Java was started on the first thread. Make sure StartOnFirstThread is not specified in your application's Info.plist or on the command line
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1878)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1779)
at java.lang.Runtime.loadLibrary0(Runtime.java:823)
at java.lang.System.loadLibrary(System.java:1045)
at sun.security.action.LoadLibraryAction.run(LoadLibraryAction.java:50)
at java.security.AccessController.doPrivileged(Native Method)
at sun.awt.NativeLibLoader.loadLibraries(NativeLibLoader.java:38)
at sun.awt.DebugHelper.<clinit>(DebugHelper.java:29)
at java.awt.EventQueue.<clinit>(EventQueue.java:81)
at javax.swing.SwingUtilities.invokeLater(SwingUtilities.java:1264)
at launchertest.Test.main(Main.java:23)
Does anybode have a clue how to solve this? These steps work fine on Windows platform. Any help is appreciated. Thank you.

Answer 1

I found this: http://developer.apple.com/mac/library/samplecode/simpleJavaLauncher/index.html which seems pretty well. It's quite complicated, but works for me. Hope it will help to somebody else.