// RandomArray: create random array for sorting
public class RandomArray {
   private int size;
   private double[] a; // holds numbers to sort

   public RandomArray(int s) {
      size = s;
      a = new double[size];
      generateArray();
   }

   private void generateArray() {
      for (int i = 0; i < a.length; i++) // generate numbers to sort
         a[i] = Math.random();
   }
   
   public double[] getArray() {
      return a;
   }
   
   public void printStart() {
      int i = 0;
      int limit = 20;
      while (i < limit && i < size)
         System.out.println(a[i++]);
   }
}