Interfaces

• used to achieve abstraction, polymorphism and multiple inheritances.
• what is allowed ? - https://www.baeldung.com/java-interfaces#1-rules-for-creating-interfaces
• Why use ?
  • Behavioral Functionality
    • Comparable, Comparator, and Cloneable are Java interfaces that can be implemented by unrelated classes.
  • Multiple Inheritence
  • Polymorphism
  • Reference
• https://www.baeldung.com/java-interfaces