Chapter 18, Problem 3PC

Program Plan Intro

PointList class

Program plan:

• Import the required package.
• Create the class “Point” with a type parameter T,
  • Declare necessary variables.
  • Define the constructor.
  • Define the “setx()” and “sety()” methods to set the values for X and Y Coordinates.
  • Define the “getx()” and “gety()” methods to return the values of X and Y Coordinates.
• Create the class “PointList” that extends the class “Point”,
  • Define the constructor.
  • Define the public method “add()”,
    • Store the value in “ArrayList” using the reference variable “obj”.
      • Define the “toString()” method.
• Create the class “PointListexam”,
  • Define the method main(),
    • Create the object of a class “Point” as a type of “Integer”.
    • Create the object for the class “PointList” that accepts the object of type Point.
    • Call the “add()” method using the object of “PointList” to fill the values of “ArrayList”.
    • Call the method “toString()” to print elements of “ArrayList”.