Reverse element of an array

public class ArrayReverse {

public static void main(String[] args) {
// Reverse element of an array

int[] arr = new int[4];

System.out.println("// Reverse element of an array");
for(int k=0; k<arr.length; k++)
{
arr[k] = (int) (Math.random()*100);
System.out.print(" " +arr[k]);
}
System.out.println();
System.out.print("------------");

for(int i=0; i<arr.length/2; i++)
{
int temp = arr[i];
arr[i] = arr[arr.length - 1-i];
arr[arr.length - 1-i] = temp;
}
System.out.println();

for(int j=0; j<arr.length; j++)
{
System.out.print(" " +arr[j]);
}
}
}
Output: