AWT started from JNI (does not work, using Mac OS X)

Makefile

JAVAHOME=/Library/Java/JavaVirtualMachines/1.7.0.jdk/Contents/Home

swing: swing.c StartAWT.class
  gcc -Wall -pedantic --std=c99 swing.c -ljvm \
    -L$(JAVAHOME)/jre/lib/server \
    -I$(JAVAHOME)/include \
    -I$(JAVAHOME)/include/darwin \
    -o $@
	install_name_tool -add_rpath $(JAVAHOME)/jre/lib/server $@

StartAWT.class: StartAWT.java
	javac StartAWT.java

clean:
	rm -rf *.o swing

.PHONY: clean

StartAWT.java

import javax.swing.*;

    public class StartAWT {

        public static class Starter implements Runnable {
            public void run() {
                System.out.println("Runnning on AWT Queue.");

                JFrame.setDefaultLookAndFeelDecorated(true);
                JFrame frame = new JFrame("That's a frame!");
                JLabel label = new JLabel("A Label");
                frame.getContentPane().add(label);

                frame.pack();
                frame.setVisible(true);
            }
        }

        public static class GUI implements Runnable {
            public void run() {
                try {
                    System.out.println("Going to put something on the AWT queue.");
                    new Thread(new Runnable() {
                        public void run() {
                            System.out.println("Hey there!");
                            SwingUtilities.invokeLater(new Starter());
                        }
                    }).start();
                    long i = 0;
                    for (;;) {
                        System.out.printf("Thread still alive (%d)\n", i++);
                        try {
                            Thread.sleep(5000);
                        } catch (Exception exc) {
                            throw new RuntimeException(exc);
                        }
                    }
                        } catch (Exception exc) {
                    throw new RuntimeException(exc);
                }
            }
        }

        public static void run() {
            Thread gui = new Thread(new GUI());
            gui.start();
        }

        public static void main(String... args) {
            run();
        }

    }

swing.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "jni.h"

JNIEnv*
create_vm(JavaVM ** jvm)
{
    JNIEnv* env;
    JavaVMInitArgs vm_args;
    vm_args.version = JNI_VERSION_1_6;
    vm_args.nOptions = 0;
    vm_args.ignoreUnrecognized = 0;

    if (JNI_CreateJavaVM(jvm, (void**) &env, &vm_args) < 0) {
        return NULL;
    }

    return env;
}

int main(int argc, char** argv)
{
    JavaVM* jvm;
    JNIEnv* env = create_vm(&jvm);

    jclass class = (*env)->FindClass(env, "StartAWT");
    jmethodID method = (*env)->GetStaticMethodID(env, class, "run", "()V");
    
    printf("So far everything worked.\n");
    (*env)->CallStaticVoidMethod(env, class, method);

    printf("That's it, done!\n");

    for (unsigned long i = 0;; i++) {
        printf("Main Thread is alive (%lu)\n", i);
        sleep(5);
    }

    (*jvm)->DestroyJavaVM(jvm);

    printf("Done.\n");
}