[Java] (Learning Memo) Java Level 2 Measures: Q1 Key Points (Knowledge)

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Java Self-learning notes

Q1 Summary of points

  • Oya
  • Inheritance»Ko (subclass of Oya)
  • Inheritance> Mago (subclass of Oya)

  • this can be used by superclasses and subclasses

  • java.io.FileOutpuStream class is Subclass of java.lang.Object class

  • Java is “multiple inheritance” NG! !! Subclass can inherit attributes and operations of superclass In the reference variable of the superclass, Subclass object assignment OK!

  • ——– TBE ————-

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