Question

Let’s say I have an array list of objects, and each object has the Parameters:

Object(String string, int x, int y)

How would I get only the string parameter at the given index? I hope I’m not being too broad here..
I only want to retrieve the String parameter from the Object at the specified index in my ArrayList.

Answer 1

Use generic ArrayLists if at all possible and simply call your object’s getter method for the field whose value you wish to obtain. Otherwise if you can’t use a generic ArrayList, you’ll have to cast the object returned to the type it should be before calling the getter (accessor) method.

e.g. assuming a getter method of getString(),

myArrayList.get(3).getString();

if not generic you’ll have to cast to your object’s class:

((MyClass)myArrayList.get(3)).getString();