Is it possible to add only String and Integer to ArrayList(Must be generic) by using JAVA GENERICS

**hemasankar** · August 27th, 2014, 05:26 AM

Hi

any one please help to solve title problem....

Problem like:

i am interested to add integer objects and String objects into any collection object ..... if it is possible please provide source code..

while iterating the collection object i am not interested to do any type cast in java

Thanks in advance...

**Cornix** · August 27th, 2014, 06:28 AM

Not directly. But you can implement a new class (or interface) that can wrap-up either a String or an Integer and then store this class in your collection.

**Norm** · August 27th, 2014, 07:12 AM

If two different types are in the arraylist, how will the code know which type is returned by the get() method?

**dextr** · August 29th, 2014, 09:51 AM

List<Object> list = new ArrayList<Object>();
	list.add(new Integer(1));
	list.add(new String("Tom"));
	System.out.println(list);

I really dont know why I'm writing this..kind of defeats the whole purpose of using generics in Java, which happens to be a compile time check to help the developer write a better code(which is, not to put an Integer in a list of String)..Probably you can tell us about what is the problem statement that you are trying to solve rather than trying to come up with a solution on your own and then asking for that solution ?

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