title: Java: Why are wrapper classes needed?
body: <p>On the very high level, I know that we need to "wrap" the primitive data types, such as int and char, by using their respective wrapper classes to use them within Java collections.I would like to understand how Java collections work at the low level by asking:"why do we need to wrap primitive data types as objects to be able to use them in collections?"I thank you in advance for your help.</p>