Inheritance with array

[Cougar Vis]

can i use inheritance with array, where the array is stored in the Superclass (first level), then subclass for the methods?

Where can i find some examples for this?

[john guthrie]

do you mean this (which you can do):

public class A {
  protected int[] array;
}
 
public class B extends A {
  public void doSomething() {
    array = new int[] { 1,2,3 };
  }
}

or this (which you cannot):

public class A {
  protected C[] array;
  public A() {
    array = new C[] { new C("E"), new C("F") };
  }
  public void print() {
    for (int i = 0; i < array.length; i++) {
      System.out.println(array[i]);
    }
  }
}
 
public class B extends A {
  protected D[] array;
  public static void main(String[] args) {
    B b = new B();
    b.array = new D[] { new D("E"), new D("F") };
    b.print();
  }
}
 
public class C {
  protected String text;
  public C(String t) {
    text = t;
  }
  public String toString() {
    return text;
  }
}
 
public class D {
  protected String text;
  public D(String t) {
    text = t+"!";
  }
}

[Layne Lund]

Can you describe the problem you are trying to solve with this approach? Also give some more detail about what you are trying to do. I'm not quite sure what you are asking about.

Also, have you tried to write code and compile it? In the end, the compiler is the ultimate arbiter that decides what you can and cannot do in the language.

Layne

[Marilyn de Queiroz]

CougarV12,

Welcome to JavaRanch!

We ain't got many rules 'round these parts, but we do got one. Please change your display name to comply with The JavaRanch Naming Policy.

Thanks Pardner! Hope to see you 'round the Ranch!

[Cougar Vis]

Originally posted by Marilyn de Queiroz:
CougarV12,

Welcome to JavaRanch!

We ain't got many rules 'round these parts, but we do got one. Please change your display name to comply with The JavaRanch Naming Policy.

Thanks Pardner! Hope to see you 'round the Ranch!

hmmm...what's wrong with my name, been using it since then ?
Cougar actually is my nick name, V12 = Vis


=======================================================================

I have no idea how to do and not sure whether you can use array in inheritance.

What i wanted to do is
Eg. 5 Radio cars each one of them can only have 2 action either "F" "B" "L" & "R".
I needed to use inheritance to save on the coding which it possiblely could, but not sure how to use array with it, so it store their action in the superclass, then execute the method in their subclasses
[ November 23, 2004: Message edited by: Cougar Vissert ]