Java Program to find second smallest element

import java.util.Scanner;
public class demo1
{
 public static void main(String[] args) 
 {    	
  int num, min;
  Scanner input = new Scanner(System.in);       
  System.out.print("Enter number of elements : ");
  num = input.nextInt();     
  int arr[] = new int[num];       
  System.out.println("Enter the elements in array : ");
        
  for (int a = 0; a < num; a++) 
  {
   arr[a] = input.nextInt();
  }
  for (int a = 0; a < num; a++) 
  {
   for (int b = a + 1; b < num; b++) 
   {
    if (arr[a] > arr[b]) 
    {
     min = arr[a];
     arr[a] = arr[b];
     arr[b] = min;
    }
   }
  }
  System.out.println("The Smallest element in the array is :"+arr[1]);
 }
}