jclass class_As = env->FindClass("org/simgrid/msg/As");
jas_method_As_constructor = env->GetMethodID(class_As, "<init>", "()V");
jas_field_As_bind = jxbt_get_jfield(env,class_As, "bind", "J");
jclass class_As = env->FindClass("org/simgrid/msg/As");
jas_method_As_constructor = env->GetMethodID(class_As, "<init>", "()V");
jas_field_As_bind = jxbt_get_jfield(env,class_As, "bind", "J");