correct approach for design methods?

Question

I want to write a class method that returns a value, if the class method has an exception then it will be returned. I'm confused how to decide the class structure for this situation. What I am thinking about is that method returning an Object, if the method executes successfully then it returns a value otherwise an Exception message.

class ABC
{
   public Object xxx(int a,int b)
   {
      Object returnValue=null;
      try{retunValue=a/b;}
      catch(Excetion e){returnValue=e;}            

    return returnValue;
   }

}

Is it the correct way, I was also thinking about setXXX and getXXX methods, but this will not help me for this situation. Please help me, what is the correct approach to follow.

Thanks

Why are you returning exception? Instead throw the exception to the upper level routines . — Sandeep Pathak, Dec 09 '11 at 09:07
Handle the exception or passed it for the next level. Don't combine both — vrbilgi, Dec 09 '11 at 10:06
@vrbilgi:i want to send exception message to root not exception object.exception catch it on same class where exception raises. — Sameek Mishra, Dec 09 '11 at 10:50

score 3 · Accepted Answer · edited Dec 09 '11 at 10:24

you can throw an exception in catch block when any exception is there. and catch the exception from where you are calling that method

class ABC {

    public static Object xxx(int a, int b) throws Exception{
        Object returnValue = null;
        returnValue = a / b;
        return returnValue;
    }

    public static void main(String a[]){
        try {
            xxx(1, 2);
        } catch(Exception exc) {
            exc.printStackTrace();
        }
    }
}

score 0 · Answer 2 · edited May 23 '17 at 12:03

0

You would get an arithmetic exception for the above code . You should not throw an Arithmetic Exception, instead throw IllegalArgumentException by checking :-

public int xxx(int a,int b)

{

     if(b==0)
         throw new IllegalArgumentException("Argument divisor is 0");
    else
         return a/b;

}

See this SO Post for details .

edited May 23 '17 at 12:03

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answered Dec 09 '11 at 09:13

Sandeep Pathak

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correct approach for design methods?

2 Answers2