🚀 go-pugleaf

Shashank schrieb in Nachricht <7olh27$sb$1@news.chorus.net>...
>Consider the following Java Program


>class A
...
>class B extends A
...

>       A[] array = new B[5];
>       array[0] = new B(10);
>       array[1] = new B(8);
>       array[2] = new B(6);
>       array[3] = new A(4); // line 23
>       array[4] = new A(2); // line 24
>       for(int i = 0; i< 5; i++)

...
>java.lang.ArrayStoreException:
>        at FinalC.main(FinalC.java:23)


the error is some lines above.

A[] array = new B[5];

you have a declared A-array, but it is implemented as an B-array. So only B
and subclasses of B are allowed. On the other hand, you get only A-objects
out of this array.

A[] array = new A[5];
this helps, now you can insert A-objects and get-out A-objects.

To understand this behavior, you should remember that array's are just
special objects.

Ciao, Alex