Practice›Java Fundamentals›Module 11. Modern Java›11.4 Lambdas and streams
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Problem

11.4 Lambdas and streams — capstone: filter and sum

Read a count and then that many whole numbers into a list. Using streams, print three lines:

  • how many numbers are greater than 0
  • the sum of the even numbers
  • the sum of the squares of all numbers

For 5 then 3 -1 4 -2 5:

3
2
55

Each line is one pipeline: filter narrows, mapToInt transforms, count and sum finish the job.

time 1000 ms memory 256 Mb
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