package chap1;

public class Stopwatch

{

private long start;

private long start_nano;

private long duration;

private long duration_nano;

public Stopwatch()

{

this.start = System.currentTimeMillis();

this.start_nano = System.nanoTime();

}

public void stop()

{

this.duration = System.currentTimeMillis() - this.start;

this.duration_nano = System.nanoTime() - this.start_nano;

}

public double elapsedTimeInSeconds()

{

long now = System.currentTimeMillis();

return (now - start) / 1000.0;

}

public long elapsedTime()

{

long now = System.currentTimeMillis();

return (now - start);

}

public long getDuration()

{

return duration;

}

public long getDuration_nano()

{

return duration_nano;

}

}