Sorting and Searching V1

package chapter7;

import java.util.Arrays;
import java.util.Scanner;

public class SortingAndSearching {

    private static void print(int x[], int columnsize, int numPerLine) {
        for (int i = 0; i < x.length; i++) {
            System.out.printf("%" + columnsize + "d", x[i]);
            if ((i + 1) % numPerLine == 0 || (i + 1) == x.length)
                System.out.println();
        }
    }

    private static int[]generateJunk(int count) {
        int values[] = new int[count];
        for (int i = 0; i < values.length; i++) {
            values[i] = (int) (Math.random() * 100) + 1;
        }
        return values;
    }


    private static int[] copyArray(int values[]) {
        int duplicate[] = new int[values.length];
        for (int i = 0; i < values.length; i++) {
            duplicate[i] = values[i];
        }
        return duplicate;
    }

    public static void main(String[] args) {

        int values[] = generateJunk(100);
        System.out.println("Random Junk!");
        print(values, 5, 10);
        System.out.println();


        // linear search the junk
        Scanner input = new Scanner(System.in);
        int key;
        do {
            System.out.print("Enter key: ");
            key = input.nextInt();
            int index = LinearSearch.linearSearch(values, key);
            if (index < 0) {
                System.out.println("Not in Array");
            } else {
                System.out.println(key + " found in position " + index);
            }
        } while (key >= 0);

        // Duplicate the junk
        int duplicate[] = copyArray(values);


        // Sort the Duplicate Junk
        SelectionSort.selectionSort(duplicate);
        System.out.println("Sorted Junk!");
        print(duplicate, 5, 10);
        System.out.println();

        // Now Binary Search the dups array
        do {
            System.out.print("Enter key: ");
            key = input.nextInt();
            int index = Arrays.binarySearch(duplicate, key);
            System.out.println(index);
            if (index < 0) {
                System.out.println("Not in Array, but key could be placed in position " + (-index - 1));
            } else {
                System.out.println(key + " found in position " + index);
            }
        } while (key >= 0);

        input.close();
    }

}