Question

Write a program in Java that initializes an array with ten random integers and then print three lines of output, containing:

• Every element at an odd index
• Every odd element
• All elements in reverse order  

The program should use three different methods to implement the functionalities above.

Call the primary source file ArrayManipulator.java

Answer 1

import java.util.Random;
public class Main
{
public static void main(String[] args)
{

Random rand = new Random(); // create object of Random class to call
int[] arr= new int[10];// create array of size 10
// loop to fill array with random numbers between 0 to 50
for(int i=0; i<arr.length;i++)
arr[i]= rand.nextInt(50);

System.out.println("Every element at an odd index :");
oddIndex(arr);

System.out.println("Every odd element in array :");
oddElements(arr);

System.out.println("\nArray contents in reverse order are :");
reverse(arr);
}

// function to print elements at odd index

static void oddIndex(int arr[])
{
for(int i=1;i<arr.length;i+=2)
System.out.println("index =" + i + "element = " +arr[i]);
}

static void oddElements(int arr[])
{
for(int i=0; i<arr.length;i++)
{
if (arr[i]%2!=0)
System.out.println("index =" + i + "element = " +arr[i]);
}
}

//function to print in reverse

static void reverse(int arr[])
{

for(int i=arr.length-1;i>=0;i--)
System.out.print( "\t" + arr[i] );
}
}