package stress;public class Benchmark{    long m_start;    long m_stop;    public Benchmark()    {    }    public final void start()    {        m_start = System.currentTimeMillis();    }    public final void stop()    {        m_stop = System.currentTimeMillis();    }    /**     *  Returns duration in milliseconds.     */    public long getDurationMs()    {        return m_stop-m_start;    }    /**     *  Returns seconds.     */    public String toString()    {        return Double.toString( ((double)m_stop - (double)m_start) / 1000.0 );    }        /**     *  How many operations/second?     */    public String toString( int operations )    {        double totalTime = (double)m_stop - (double)m_start;        return Double.toString( (operations/totalTime) * 1000.0 );    }}