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Name Separator App

We will build an application to read a list of names, remove duplicate names, and group the names by first letter.

Setup

Create a new Java Project called NameSeparatorApp. Copy names.txt from the SetInterface project, and place it in the root of your new project.

Functionality

We want to use names.txt to create a List of unique names, grouped by first letter.

List of Sets

Note that the names are not sorted in each row.

Output

When you have removed duplicates and separated the names, print the list of names to the screen so that each group is on a single line.

Hints

  • To figure a name's index, remember that each letter has an ASCII value.
  • The type of this Collection will be List< Set<String> > or List< List<String> >, depending on your implementation.
  • Collections of Collections use a common pattern.
  • When your application sees a letter that starts with B, for example, it has to check if there is a Collection at index 1 for those names. If not, it creates the Collection and sets it at index 1.
  • Then it can add the name to that Collection.
  • The next time it sees a B name, it checks for a Collection at index 1, finds one, and adds the name to it.

(Optional) Can you sort each row of names alphabetically?

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