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6.4 Inheritance & Polymorphism: `extends`, `super` and `@Override`
Topic Summary
Build extensible class hierarchies using inheritance and write flexible algorithms using dynamic runtime polymorphism.
What You Will Learn
• Establish 'IS-A' relationships using the `extends` keyword.
• Invoke parent constructors and methods using `super`.
• Implement dynamic method dispatch with the `@Override` annotation.
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