Chapter 14, Problem 8PE

Program Plan Intro

Telephone lookup problem

Program plan:

Main.java

• Create a class named “Main”. Inside the class,
  • Define the “main ()” method.
    • Prompt the user to enter the phonebook file name.
    • Create object for lookup table.
    • Create a file reader object
    • Read the contents of the table.
    • Prompt user to enter the choice.
    • Based on the choice the values are searched and displayed.
    • Prompt the required details and display the required.

Item.java

• Create a class named “Item”. Inside the class,
  • Declare the required variables
  • Declare the array.
  • Declare the constructor and initialize the required variables.
  • Define the method “getKey”
    • Return the key value.
  • Define the method “getValue”
    • Return the value.
  • Define the method “compareTo()”
    • Perform the comparison
    • Return the key and value pairs.

LookupTable.java

• Create a class named “LookupTable”. Inside the class,
  • Declare the required array variables
  • Declare the constructor and initialize the required variables.
  • Define the method “read()”
    • Get the key and value.
    • Add the key and value
  • Sort the values based on the key and values.
  • Define the method “lookup()”
    • Perform the search operation
    • Condition to validate the value and return the required value.
  • Define the method “reverseLookup()”
    • Perform the search based on the key and value pair.
    • Return the values based on the key and value pair.