Chapter 12, Problem 14PP

Program Plan Intro

Remove duplicates names from file

Program Plan:

• Import required package.
• Define “InvitationList” class.
  • Define main function.
    • Create “HashSet” for names.
    • Declare required variables.
    • Assign scanner object to “null”.
    • Inside the “try” block,
      • Define “namesList” file using “FileInputStream”.
      • Check condition using “while” loop.
        • Read name from file.
        • Check if the name is in the set or not. If the name is in the set already, then ignore it. If the name is not contains in the set, then add the given name to “names_set”.
      • Close the file.
      • Display statement.
      • Display all names in set using “for” loop
    • Catch the exception using “catch” keyword.
      • Display given error and exit the program.