Help please! Using an array in another class

Question

Hello, I'm new to JAVA and I'm trying to pass an array from one class to another, but I can't get it right. I've been able to get individual values on at a time.
If any one can help me out and give me a quick sample of how to do it,
I've done this below.
Is it as simple as an individual value - but just calling it an array - instead of say a string - or is it more complex. Please Help
class BoxVol extends Box {
public static void main (String args[]) {
Box ob1 = new Box();
int[] vol;
ob1.getLength();
vol = ob1.getLength();
System.out.println("Volume is : " + vol);
} class Box {
// what are the properties or fields
     private int innerData [];
//public String length2 = "text";
// what are the actions or methods
public void setLength(String p)
     innerData = new int [5];
     for (int i=0; i < innerData.length; i++)  {
          innerData = i;
public int[] getLength()
     return innerData;

Answer 1

Guss46 wrote:
hmmm I see, I shouldve seen that last night when I was working on this....but I was very tired....
I don't have a compiler in front of me now,
would this solve my problem
1st :
ob1.getLength();
//Should be....
vol = ob1.getLength();
No you are missing my point. You original code was calling the getLength method twice. On the first line it did nothing with the returned value and on the second you assigned the returned value to vol. But the setLength method is where you actually create the array and assign values to it. So unless you call that method first then you will not have an array at all.
>
2nd:
System.out.println("Volume is : " + vol);
should be
System.out.println("Volume is : " + vol.length);
Yes you could do that but all that will tell you is the length of the array and not what values are in it.
.or vol[i] to go through it if I make a loop around it??Yep, sounds like a much better idea to me.