test token test token token st token hello old friend oidx token hello equal st token oidx st token index st token token equal st token token index oidx st token index token equal st token token old equal st token oidx st token index st token st token token equal st token token index oidx st token index st token token equal st token token index oidx st token index token equal st token token friend equal st token token st token st token token st token token equal st token token st token st token allow null pointer except npe 