Java: using polymorphism to avoid if-statements?

Question

I\'m attempting to write a java program that initializes certain layouts based on what the user selects. What I want to do is try to avoid writing a bunch of if-statements s

Answer 1

In short, yes. You'll need ifs or some mapping mechanic.

You will need some way to convert the user's input into the class you want. The ifs you have in your code will work just fine and be clear and readable. You could use a switch, too.

It is possible to avoid this, but you'll end up obfuscating your code and in the end, there will probably still be something like an if. You must define the mapping from user input to object; that cannot be circumvented. The clearest most maintainable way to do that is what you already have (though I'd put else ifs in there. :) )

The idea you have of a different class for each layout isn't bad. This is much like the concept of a traits class. Look into that, too. It will be helpful for your design.