Transferring an element from one array to a null element of another array

> public class sample {
>
>    public static void main(String[] args) {
>
>        int[] a = {0,1,2,3,4,5};
>        int[] b;
>        int[] c=null;
>        int[] d=new int[a.length];
>        b=a;
>        c=a;
>        for (int i=0; i        for (int i=0; i            System.out.println("a["+i+"]="+a[i]+"
 b["+i+"]="+b[i]+"
> c["+i+"]="+c[i]+"  d["+i+"]="+d[i]);
>        }
>        a[3]=-9;
>        for (int i=0; i            System.out.println("a["+i+"]="+a[i]+"
 b["+i+"]="+b[i]+"
> c["+i+"]="+c[i]+"  d["+i+"]="+d[i]);
>         }
>     }
>
> }
>