Absolute Java (6th Edition)
Absolute Java (6th Edition)
6th Edition
ISBN: 9780134041674
Author: Walter Savitch, Kenrick Mock
Publisher: PEARSON
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Chapter 16, Problem 4PP

The text files boynames. txt and girlnames. txt, which are included in the source code for this book, contain lists of the 1,000 most popular boy and girl names in the United States for the year 2005, as compiled by the Social Security Administration.

These are blank-delimited files where the most popular name is listed first, the second most popular name is listed second, and so on to the 1,000th most popular name, which is listed last. Each line consists of the first name followed by a blank space followed by the number of registered births in the year using that name. For example, the girlnames . txt file begins with

Emily 25494

Emma 22532

This indicates that Emily is the most popular name with 25,494 registered namings, Emma is the second most popular with 22,532, and so on.

Write a program that determines how many names are on both the boys' and the girls' list. Use the following algorithm:

Read each girl name as a String, ignoring the number of namings, and add it to the same HashSet object.

Read each girl name as a String, ignoring the number of namings, and add it to the same HashSet object. If the name is already in the HashSet, then the add method returns false. If you count the number of false returns, then this gives you the number of common namings.

Add each common name to an ArrayList and output all of the common names from this list before the program exits.

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