Get started with polymorphism in Java and how to do method invocation in polymorphic method calls.

There is a reason why Java method modifiers exist. If you call public methods internally and don't understand why, your developers could face major class issues.

I'm getting better with Java, even to the point where I'm almost comfortable with it, but the purpose behind one concept still eludes me: What is method overriding, and why should I care about it?