Occurence.java

import java.util.Scanner;

public class Occurence {

    /**
    *   Program:    Occurence.java
    *   Purpose:    Display frequency with which numbers [1-100] appear in array.
    *   Creator:    Chris Clarke
    *   Created:    18.04.2014
    *
    *   Notes:      For More Beginner to Intermediate Java Homework Solutions,
    *           Search Amazon for my book "50 Java Program Source Codes".
    *           Also by Chris Clarke "50 More Java Source Codes" in eBook & paperback
    */

        public static void main(String[] args) {

        // create Scanner to read keyboard
        Scanner input = new Scanner (System.in);

        // declare parameters
        int[] num = new int[101];
        int data = 0;

        System.out.print("Enter integers between 1 and 100 (zero ends) : ");

        while ((data = input.nextInt()) != 0) {
            if (data <1 || data>100) {
                break;
            } // end if
                    num[data]++;
        } // end while

        for (int i = 1; i <= 100; ++i) {
            if (num[i] > 0) {
                if(num[i] == 1) {
                    System.out.printf("%d occurs once.%n", i);
                } else {
                    System.out.printf("%d occurs %d times.%n", i, num[i]);
                } // end inner if
            } // end outer if
        } // end for

    } // end main()

} // end class Occurence