The array is reversed in this program. For example, if the user enters the array elements as 1, 2, 3, 4, 5, the program will reverse the array and the array elements will be 5, 4, 3, 2, 1. You should be familiar with the following Java programming topics in order to understand this program:

Example: To reverse the array

public class Example
{
   public static void main(String args[])
   {
	int counter, i=0, j=0, temp;
	int number[] = new int[100];
	Scanner scanner = new Scanner(System.in);
	System.out.print("How many elements you want to enter: ");
	counter = scanner.nextInt();

	/* This loop stores all the elements that we enter in an 
	 * the array number. First element is at number[0], second at 
	 * number[1] and so on
	 */
	for(i=0; i<counter; i++)
	{
	    System.out.print("Enter Array Element"+(i+1)+": ");
	    number[i] = scanner.nextInt();
	}

	/* Here we are writing the logic to swap first element with
	 * last element, second last element with second element and
	 * so on. On the first iteration of while loop i is the index 
	 * of first element and j is the index of last. On the second
	 * iteration i is the index of second and j is the index of 
	 * second last.
	 */
	j = i - 1;     
	i = 0;         
	scanner.close();
	while(i<j)
	{
  	   temp = number[i];
	   number[i] = number[j];
	   number[j] = temp;
	   i++;
	   j--;
	}

	System.out.print("Reversed array: ");
	for(i=0; i<counter; i++)
	{
	   System.out.print(number[i]+ "  ");
	}       
   }
}

Output:

How many elements you want to enter: 5
Enter Array Element1: 11
Enter Array Element2: 22
Enter Array Element3: 33
Enter Array Element4: 44
Enter Array Element5: 55
Reversed array: 55 44 33 22 11

array is reversed array is reversed array is reversed array is reversed array is reversed array is reversed array is reversed

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