Lecture notes
contents
Interfaces
- Named collection of abstract methods and constant declarations
- The methods are defined, but not implemented
- You can convert from a class type to an interface type (if the class implements interface)
BancAccount account = new BankAccount(1000);
Measurable x = account;- You cannot convert between unrelated types
Polymorphism
- Principle that behavior can vary depending on the type of an object
- In Java, the type of an object determines the method that is called
Key takeaways
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