You do not need to explicitly import array
You should create it like

int[] intArray = new int[size];

if you need vector
than it is in

java.util.Vector;

I'm using Arrays.fill method to initialize the array with zeros. I didn't find
an analogous function in Vector class and by creating my own function that
iterates for all elements and assign 0 to them it's not more optimal than the
JDK implemented functions, I think.

Maybe you should explicitly modify Visual J++ 6.0
Somewhere in the preferences or in options so that
It will use the jdk  you have installed.

This is the speedy one;

static int[]
array={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
System.arraycopy(array, 0, myarray, 0, 12);

: )

And this is the Arrays.fill implementation

public static void fill(int[] a, int fromIndex, int toIndex, int val) {
rangeCheck(a.length, fromIndex, toIndex);
for (int i=fromIndex; i<toIndex; i++)
a[i] = val;
}

AFAIK, visual  J++ only use JDK 1.1, so that you can compile  code with JDK above
1.1,
in Your case java.util.Arrays doesn't exist in JDK 1.1 it only exist in JDK 1.2
above.
that the weakness of visual J++.

You should change your IDE, if you want to compile with latest JDK such as
eclipse or maybe NetBeans

"Don't take life too seriously, cause you never get out alive"

u have to forget j++. try eclipse or jdeveloper. j++ has nothing more to serve u
different
than jdeveloper or a powerfull eclipse instalation with some useable pluggins.
and also
thay are free and platform independent, can run every platform with a singe jre
installation. j++ has been depricated and ms will not give any support on this
product.
and also u have to know that j++ is not java, it was a primitive c#, nothing
more,
has its own jvm build by ms and has no more support for next generation java
libraries.
util, swing ...