instanceof

• VM keeps track of Run-time Type Information (RTTI)

• boolean operator to query type of object

• can also use the getClass() method

  • method defined in Object
  • returns java.lang.Class

Animal d=new Dog();

Animal c=new Cat();

System.out.println(d instanceof Dog); // true

System.out.println(d instanceof Animal); // true

System.out.println(c instanceof Dog); // false

System.out.println(c instanceof Object); // true

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