Simple oop question - duplicate call to different instance

[Sharon whipple]

Sorry if the title unclear, I will explain:
Say I got abstract class ABS with some methods implemented in it:

Abstract ABS {
	public abstract doWork();
	Public setID(){body}
	Public setName(){body}
	Public setSerialNumber(){body}
}

And two derived classes FOO,BAR

class FOO extends ABS{
	doWork();
	fooSpesificAction();
}
class BAR extends ABS{
	doWork();
	barSpesificAction();
}

Now I would like to create list of ABS

ABS inst=null;
      while(list.hasNext()) {
         testObj = list.next();
		if(testObj requires FOO){
			inst = new Foo();
			inst.setId(1);
			inst.setName(1);
			inst.setSerialNumber(1);
			inst.setFooSpesificAction();
	 	}
		else{
			inst = new BAR();
			inst.setId(1);
			inst.setName(1);
			inst.setSerialNumber(1);
			inst.setBarSpesificAction();
	              }
	myAbsList.add(inst);				

How do i avoid the duplicate calles to setId, setName,setSerialNumber in the If clause?
Thank you

[Seetharaman Venkatasamy]

    
      ABS inst=null;   
      while(list.hasNext()) {   
         testObj = list.next();   
        if(testObj requires FOO){   
            inst = new Foo();            
            inst.setFooSpesificAction();   
        }   
        else{   
            inst = new BAR();  
            inst.setBarSpesificAction();          
        }
      inst.setId(1);   
      inst.setName(1);   
      inst.setSerialNumber(1);     
      myAbsList.add(inst);  
     }  

[Sharon whipple]

Thank you,how do you deal with instantiating FOO,BAR
And avoid the ugly casting from ABS to FOO,BAR?

        if(testObj requires FOO){      
            inst = new Foo();               
            ((FOO)inst).setFooSpesificAction();      
        }      
        else{      
            inst = new BAR();     
            ((BAR)inst).setBarSpesificAction();             
        }   

[Rob Spoor]

        if(testObj requires FOO){      
            Foo foo = new Foo();
            foo.setFooSpesificAction(); // should be Specific, with a c ;)
            inst = foo;
        }      
        else{      
            Bar bar = new BAR();
            bar.setBarSpesificAction(); // again, c instead of s
            inst = bar;
        }