CSCI 201 002, 8 September

• primitive types and values
  • byte, short, int, long
  • float, double
  • char
  • boolean
• object and class
  • Every object belongs to a class
  • generally to several classes -- more later
• classes you have met
  • Math
  • World
  • Turtle
• objects you can make
  • turtleTown
  • slowPoke
• Creating objects
  • TypeName variableName = new ClassName(...) ;
  • World turtleTown = new World() ;
  • Turtle slowPoke= new Turtle(turtleTown) ;
• Invoking class methods
  • ClassName.methodName(...)
  • Math.pow(2.0, n/12.0)
  • Math.ulp(x)
• Invoking object methods
  • ObjectReference.methodName(...)
  • slowPoke.forward(20)
  • turtleTown.remove(slowPoke)
• Method signature
  • Name and paramter type determine the method
  • These are different
    • slowPoke.forward()
    • slowPoke.forward(20)