java programming

import java.util.Random; /** * A class that provides a random array of marks, * approximately normally distributed. * @author Ken Lodge */ public class Marks { private static final int NMARKS = 125; private static final double mean = 65.0; private static final double std = 15.0; /** * Returns an array of NMARKS integer marks approximately normally distributed, * with specified mean (mean) and standard deviation (std), * and with values outside 0..100 removed. * @return the array of marks. */ public static int[] getMarks() { Random rand = new Random(1001L); int mark; int[] theMarks = new int[NMARKS]; int n = 0; while (n < NMARKS) { mark = (int) Math.round(std*rand.nextGaussian() + mean); if (mark >= 0 && mark <= 100) theMarks[n++] = mark; } return theMarks; } /** * Test code * @param args not used */ public static void main(String[] args) { int[] testMarks = getMarks(); for (int n = 0; n < testMarks.length; n++) { System.out.print(testMarks[n] + " "); if (n % 10 == 9) System.out.println(); } } }