Java Array Manipulation Program

Array Manipulation Programs in Java

import java.util.*;

/**

* This program demonstrates array manipulation.

*/

public class ArrayManipulate

{

public static void main(String[] args)

{

Scanner in = new Scanner(System.in);

System.out.print("How many numbers do you need to draw? ");

int k = in.nextInt();

System.out.print("What is the highest number you can draw? ");

int n = in.nextInt();

// fill an array with numbers 1 2 3 . . . n

int[] numbers = new int[n];

for (int i = 0; i <>

numbers[i] = i + 1;

// draw k numbers and put them into a second array

int[] result = new int[k];

for (int i = 0; i <>

{

// make a random index between 0 and n - 1

int r = (int) (Math.random() * n);

// pick the element at the random location

result[i] = numbers[r];

// move the last element into the random location

numbers[r] = numbers[n - 1];

n--;

}

// print the sorted array

Arrays.sort(result);

System.out.println("Bet the following combination. It'll make you rich!");

for (int r : result)

System.out.println(r);

}

}

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