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TC Ooi5,858 Points
Object data type vs Primitive data type
I was learning collection and I saw the type declared are object data type e.g. Integer and Character instead of int or char. Can I know when to use the correct data type?
Simon Coates28,693 Points
With collections, you typically want the object type. So a collection of characters might be List<Character>. The Character class is a 'wrapper' class. It's a class that exists to allow a primitive char to fit into places that need an object. Auto boxing and unboxing is a process where a primitive converts to a object wrapper type or back again. ( see https://docs.oracle.com/javase/tutorial/java/data/autoboxing.html )