Calculating salaries

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The first parameter of the main method is a file name. Each line of the specified file has the following format: name value where [name] is a String and [value] is a double. [name] and [value] are separated by a space. Find the sum of all the values for each name. Display all the data, sorted by na

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Олег Байбула

Level 32 , Ukraine

Expert

5 March, 07:12

It's awkward using Double here instead of BigDecimal. Consider the next example if you don't agree:

Peterson 2
Smith 6
Smith 6
Smith 6
Smith 6
Baxter 1.35
Peterson 2.1
Peterson 2.1
Peterson 2.1

Justin Smith

Level 39 , Greenfield, USA, United States

7 November 2021, 13:09

CodeGym hasn't formally introduced TreeMap in the lessons yet, but it makes this rather easy. You should be familiar with it at this point, and if not I recommend googling how it works. It's just like HashMap but auto-sorts by key.

Олег Байбула

Level 32 , Ukraine

Expert

5 March, 05:13

And you should use Stream API.

Trevor

Level 23 , Phoenix, United States

31 January 2020, 20:12

Use a TreeSet and pass a comparator to sort your values :)

Henrique

Level 41 , São Paulo, Brazil

1 July 2020, 17:34

Using your idea of a TreeSet, I used a TreeMap and it worked as well (with no need of a comparator).