static jfieldID jcomm_field_Comm_bind;
static jfieldID jcomm_field_Comm_finished;
static jfieldID jcomm_field_Comm_receiving;
static jfieldID jcomm_field_Comm_bind;
static jfieldID jcomm_field_Comm_finished;
static jfieldID jcomm_field_Comm_receiving;