Java Concepts

• Classes

  • contains methods and fields
  • single inheritance: class s extends ss

• Interfaces

  • contains abstract methods
  • (and static fields)
  • multiple inheritance
    • interface i extends r, t
  • A specification for a class
    • class s implements i
  • Instances of interfaces are not created, instances of classes that implement the interface may be bind to interfaces.

r

t

i

s

object

ss

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