Assigning object of one class to object of another class.

Question

Hi,
How will i assign an object of one class to an object of another class?
Ex:
ClassX A=some_method();
Now how will I assign the object A of class ClassX to the object 'B' of another class 'ClassY'.

Answer 1

In java you can only assign a object reference of one class into object reference of another class if the first class is the Second class (in other words the first class is a subclass of second class).
for example if this is a inheritance chart
Car ==========>Mercedes
"===========>Audi
then you can use
Audi a1 = new Audi();
Car c1 = a1;
or Mercedes m1 = new Mercedes();
Car c1 = m1;
but not
a1 = m1;
before assigning a variable into another variable of different class, use:
if(variable1 instanceOf ToBeAssignedIn Class){
variable2 = variable1;
example:
Audi a1;
Car c1;
if(a1 instanceOf Car){
c1 = a1;
Edited by: gaurav.suse on Apr 10, 2012 1:14 PM
Edited by: gaurav.suse on Apr 10, 2012 1:15 PM