/*
 * This class contains some useful methods dealing with arrays.
 * Since we will be using this class in various future programs,
 * we will create it as a separate class.
 * Think of it as a library class that we created much like the
 * system-provided library class such as Math, Random, Scanner, etc.
 */

public class ArrayTools {

    // Returns an array of n random integers.  The integers are
    // chosen from the interval [0..range)
    public static int[] randomArray(int size, int range) {
        int[] a = new int[size];
        java.util.Random r = new java.util.Random();
        for (int i = 0; i < a.length; i++) {
            a[i] = r.nextInt(range);
        }
        return a;
    }

    public static void printArray(int[] a, String msg) {
        System.out.println(msg);
        for (int i = 0; i < a.length; i++) {
            System.out.print(a[i] + " ");
        }
        System.out.println();
    }

    public static void printArray(Student[] a, String msg) {
        System.out.println("By printArray(Student[] a. . .)");
        System.out.println(msg);
        for (int i = 0; i < a.length; i++) {
            System.out.println("  " + a[i]);
        }
        System.out.println();
    }

    /* We will use this one later after we talk about Object.
     */
  /*
  public static void printArray(Object[] a, String msg) {
    System.out.println("By printArray(Object[] a. . .)");
    System.out.println(msg);
    for (int i = 0; i < a.length; i++) {
      System.out.println("  " + a[i]);
    }
    System.out.println();
  }
*/
}