A class for measuring how long it takes for a program to run
/**
A class to measure time elapsed.
*/
public class Stopwatch
{
private long startTime;
private long stopTime;
public static final double NANOS_PER_SEC = 1000000000.0;
/**
start the stop watch.
*/
public void start(){
startTime = System.nanoTime();
}
/**
stop the stop watch.
*/
public void stop()
{ stopTime = System.nanoTime(); }
/**
elapsed time in seconds.
@return the time recorded on the stopwatch in seconds
*/
public double time()
{ return (stopTime - startTime) / NANOS_PER_SEC; }
public String toString(){
return "elapsed time: " + time() + " seconds.";
}
/**
elapsed time in nanoseconds.
@return the time recorded on the stopwatch in nanoseconds
*/
public long timeInNanoseconds()
{ return (stopTime - startTime); }
}
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