Class StopwatchCPU

  • public class StopwatchCPU
    extends Object
    The StopwatchCPU data type is for measuring the CPU time used during a programming task. See Stopwatch for a version that measures wall-clock time (the real time that elapses).
    Josh Hug, Robert Sedgewick, Kevin Wayne
    • Constructor Detail

      • StopwatchCPU

        public StopwatchCPU()
        Initializes a new stopwatch.
    • Method Detail

      • elapsedTime

        public double elapsedTime()
        Returns the elapsed CPU time (in seconds) since the stopwatch was created.
        elapsed CPU time (in seconds) since the stopwatch was created
      • main

        public static void main​(String[] args)
        Unit tests the StopwatchCPU data type. Takes a command-line argument n and computes the sum of the square roots of the first n positive integers, first using Math.sqrt(), then using Math.pow(). It prints to standard output the sum and the amount of time to compute the sum. Note that the discrete sum can be approximated by an integral - the sum should be approximately 2/3 * (n^(3/2) - 1).
        args - the command-line arguments