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Java Guild Meeting 5/2018

Gi11i4m
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01 Welcome
02 Streams - Intro
03 Streams - Practice
04 Streams - Micro kata's
05 Streams - Summary
06 Optionals
07 Optionals - Practice
08 Optionals - Outro
09 Generics
10 Generics - Generifying existing code
11 Thanks for playing!
Previous: Streams - Intro Next: Streams - Micro kata's

Practice

Now that we know how to use Streams, let's try another exercise and get to know some more operators

  • filter
  • mapToInt → this will return an IntStream, which has some different operators from the default Stream
  • sum
Now, starting again from a list of names, give me the total number of letters in all the names with more than 5 letters
// { autofold
package streams;
import java.util.stream.*;
public class LetterCount {
// }
public static int getTotalNumberOfLettersOfNamesLongerThanFive(String... names) {
return 0;
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