Need to pairing array numbers and swap them with next elements?

Need to fix this piece of code for use with n Number of some finite array.
swapping with next one like this code outputs "456123" next three are swap with other next three elements. 

<pre> int[] array = {1, 2, 3, 4, 5, 6};
    int c;
    for(int i=0;i<=2;i++)
    {
        c = array[i];
        array[i] = array[i+3];
        array[i+3] = c;         
    }       
    for(int i=0;i<=5;i++)
        System.out.println(array[i]);