public class App {
    public static void main(String[] args) {
    	Guice.createInjector(new AbstractModule() {
    		@Override
    		protected void configure() {
    			// just testing
    		}
    	});
    }
}

Exception in thread "main" java.lang.NoClassDefFoundError: [Lorg/aopalliance/intercept/MethodInterceptor;
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2427)
    at java.lang.Class.getDeclaredMethods(Class.java:1791)
    at com.google.inject.internal.ProviderMethodsModule.getProviderMethods(ProviderMethodsModule.java:78)
    at com.google.inject.internal.ProviderMethodsModule.configure(ProviderMethodsModule.java:70)
    at com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:223)
    at com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:232)
    at com.google.inject.spi.Elements.getElements(Elements.java:101)
    at com.google.inject.InjectorShell$Builder.build(InjectorShell.java:135)
    at com.google.inject.InjectorBuilder.build(InjectorBuilder.java:102)
    at com.google.inject.Guice.createInjector(Guice.java:92)
    at com.google.inject.Guice.createInjector(Guice.java:69)
    at com.google.inject.Guice.createInjector(Guice.java:59)
    at App.main(App.java:6)
Caused by: java.lang.ClassNotFoundException: org.aopalliance.intercept.MethodInterceptor
    at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
    ... 14 more

windows: java -cp aopalliance.jar;guice-2.0.jar;other_jars.jar YourMainClass
*nix:    java -cp aopalliance.jar:guice-2.0.jar:other_jars.jar YourMainClass