Question

I have this method getData as shown .
It is expecting an array of bag Objects as shown
please see the code below :

public static String getData(Bag[] bag)
 {

 }

public class Bag
{
 public char side;
}

But , when i tried i am getting ClassCastException .
I have done this way :

Object bagArray[] = new Object[1];
Bag  bagData = new Bag();
bagData.side = 'S';
bagArray[0]=bagData;
String bagData = ApplicationUtil.getData(Bag[]) bagArray);

Please let me , how to resolve this error ??

Answer 1

The problem is that bagArray is an array of Object and not an array of Bag.

Either change that to Bag bagArray[] = new Bag [1]; or use a Collection (e.g. List) instead – note that you can cast List<Object> to List<Bag> but that is an unsafe operation and not recommended unless you know what you’re doing.