Big Java Late Objects
Big Java Late Objects
2nd Edition
ISBN: 9781119330455
Author: Horstmann
Publisher: WILEY
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Chapter 9, Problem 9PP
Program Plan Intro

Combined Resistance

Program plan:

Filename: “Circuit.java”

This program file is used to define a class “Circuit”. In the code,

  • Define a class “Circuit”.
    • Define the method “getResistance()”.
      • Return “0”.

Filename: “Resistor.java”

This program file is used to define a class “Resistor”. In the code,

  • Define a class “Resistor”.
    • Define the class member “resistance”.
    • Define the method “Resistor()”.
      • Set the value of “resistance”.
    • Define the method “getResistance()”.
      • Return the value of “resistance”.

Filename: “Parallel.java”

This program file is used to define a class “Parallel”. In the code,

  • Import the required packages.
  • Define a class “Parallel” as extending from “Circuit”.
    • Define an array list “circuits”.
    • Define the constructor “Parallel()”.
      • Define the array list.
      • Call the method “design()”.
    • Define the method “add()”.
      • Add “circuit” to array list “circuits”.
    • Define the method “getResistance()”.
      • Define a double variable “sum”.
      • Iterate a “for” loop,
        • Calculate the resistance and add it to “sum”.
          • Return “1/sum”.

Filename: “Serial.java”

This program file is used to define a class “Serial”. In the code,

  • Import the required packages.
  • Define a class “Serial” as extending from “Circuit”.
    • Define an array list “circuits”.
    • Define the constructor “Serial()”.
      • Define the array list.
      • Call the method “design()”.
    • Define the method “add()”.
      • Add “circuit” to array list “circuits”.
    • Define the method “getResistance()”.
      • Define a double variable “sum”.
      • Iterate a “for” loop,
        • Calculate the resistance and add it to “sum”.
          • Return “1/sum”.

Filename: “CircuitDemo.java”

This program file is used to define a class “CircuitDemo”. In the code,

  • Import the required packages.
  • Define a class “CircuitDemo”.
    • Define the method “main()”.
      • Define the object “circuit1” of class “Parallel”.
      • Add a new resistor of resistance “100” using “circuit1”.
      • Define the object “circuit2” of class “Serial”.
      • Add a new resistor of resistance “100” using “circuit2”.
      • Add a new resistor of resistance “200” using “circuit2”.
      • Add “circuit1” and “circuit2”.
      • Print the combined resistance.

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Big Java Late Objects

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