public static void main(String[] args) {
    int n = Integer.parseInt(args[0]);
    int t = Integer.parseInt(args[1]);

    Stopwatch sw = new Stopwatch();
    PercolationStats ps = new PercolationStats(n, t);
    double secondsElapsed = sw.elapsedTime();

    StdOut.println("Seconds elapsed = " + secondsElapsed);

    StdOut.println("mean = " + ps.mean());
    StdOut.println("stddev = " + ps.stddev());
    StdOut.println("95% confidence interval = " + ps.confidenceLo() + ", " + ps.confidenceHi());
  }
  public static void main(String[] args) {
    Comparable[] array = new Comparable[100000];
    Random r = new Random();

    for (int i = 0; i < array.length; i++) {
      array[i] = r.nextInt(10000);
    }
    Arrays.sort(array);

    Stopwatch stopwatch = new Stopwatch();
    EditedQuick.sort(array);

    System.out.println(stopwatch.elapsedTime());
  }
示例#3
0
文件: Meter.java 项目: KoHHeKT/Algs4
 public static double TrialQuickUnionUF(int N) {
   Stopwatch watch = new Stopwatch();
   QuickUnionUF uf = new QuickUnionUF(N);
   for (int i = 0; i < N; i++) {
     int p = StdRandom.uniform(N);
     int q = StdRandom.uniform(N);
     if (!uf.connected(p, q)) {
       uf.union(p, q);
     }
   }
   double time = watch.elapsedTime();
   // printTree(uf);
   return time;
 }
  // if you go to larger n, then you will run out of Java Heap space
  public static void main(String[] args) {
    double[][] results = new double[12][8];
    double time;
    for (int n = 4, i = 0; n <= 8192; n *= 2, i++) {

      // Create two bags of the integers [1, n]. Bag 'one' has all numbers
      // while bag two has odd numbers only.
      // Add the numbers in REVERSE ORDER otherwise this will take a LOOOOONG time.
      UniqueBag<Integer> one = new UniqueBag<Integer>();
      UniqueBag<Integer> two = new UniqueBag<Integer>();
      UniqueBag<Integer> three = new UniqueBag<Integer>();
      for (int k = n; k >= 1; k--) {
        one.add(k);
        if (k % 2 == 1) {
          two.add(k);
        }
      }

      // at this point you can benchmark some operations:
      // size, identical, add, toArray, contains, remove, intersects, union
      // use StopWatch as you did before.

      Stopwatch sizeStop = new Stopwatch();
      one.size();
      time = sizeStop.elapsedTime();
      results[i][0] = time;

      Stopwatch identicalStop = new Stopwatch();
      one.identical(two);
      time = identicalStop.elapsedTime();
      results[i][1] = time;

      Stopwatch addStop = new Stopwatch();
      one.add(n + 1);
      time = addStop.elapsedTime();
      results[i][2] = time;

      Stopwatch arrayStop = new Stopwatch();
      one.toArray();
      time = arrayStop.elapsedTime();
      results[i][3] = time;

      Stopwatch containsStop = new Stopwatch();
      one.contains(1);
      time = containsStop.elapsedTime();
      results[i][4] = time;

      Stopwatch removeStop = new Stopwatch();
      one.remove(1);
      time = removeStop.elapsedTime();
      results[i][5] = time;

      Stopwatch intersectsStop = new Stopwatch();
      one.intersects(two);
      time = intersectsStop.elapsedTime();
      results[i][6] = time;

      Stopwatch unionStop = new Stopwatch();
      one.union(two);
      time = unionStop.elapsedTime();
      results[i][7] = time;
    }
    StdOut.println("Time Trials");
    StdOut.println("Trial\tsize\tidentical\tadd\ttoArray\tcontains\tremove\tintersects\tunion\n");
    for (int i = 0; i < 12; i++)
      StdOut.println(
          i
              + "\t"
              + results[i][0]
              + "\t"
              + results[i][1]
              + "\t"
              + results[i][2]
              + "\t"
              + results[i][3]
              + "\t"
              + results[i][4]
              + "\t"
              + results[i][5]
              + "\t"
              + results[i][6]
              + "\t"
              + results[i][7]);
  }