JetBrains Academy: Taking elements - Kamil-Jankowski/Learning-JAVA GitHub Wiki
Secret codes:
You've found a sequence of codes on the Internet in the HEX format (hexadecimal numbers). You have an assumption that this sequence has a secret subsequence enclosed between "#0000" and "#FFFF". Apply your knowledge of Stream API to extract all codes between them (excluding both "#0000" and "#FFFF").
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;
import java.util.stream.Collectors;
public class Main {
private static List<String> extractCodes(List<String> codes) {
// write your code here
return codes.stream()
.dropWhile(code -> !"#0000".equals(code))
.takeWhile(code -> !"#FFFF".equals(code))
.skip(1)
.collect(Collectors.toList());
}
/* Please do not modify the code below */
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
List<String> codes = Arrays.stream(scanner.nextLine()
.split("\\s+"))
.collect(Collectors.toList());
System.out.println(String.join(" ", extractCodes(codes)));
}
}