Questions tagged [intstream]
10 questions
2
votes
2 answers
Java multi-threading on an Intel core i5 processor
I am working on a PC with an Intel Core i5 processor which reports to have 12 processors, which I believe is comprised of 6 cores each with two threads.
I have done some research and it appears that Java uses kernel threading. I need to dramatically…
cnash
- 23
- 3
2
votes
1 answer
IntStream equivalence in Swift
I am investigating some of the components in Java and wondering what is the best practice to convert the following Java code snippet to Swift.
public void doTest(ArrayList items) {
// I know that I should check the count of items. Let's…
thus
- 1,326
- 1
- 14
- 23
2
votes
2 answers
IntStream iterate function with filter
I was reading this book called Modern Java in Action and one part of code I could not comprehend.
IntStream.iterate(0, n -> n + 4)
.filter(n -> n < 100)
.forEach(System.out::println);
Authors says that code…
Rakesh Chauhan
- 413
- 4
- 7
1
vote
1 answer
Dynamically determine the IntStream.range()
I hve this code which loops through lines of integers and enters them into a List:
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
List> arr = new ArrayList<>();
IntStream.range(0, 12).forEach(i…
runnerpaul
- 5,942
- 8
- 49
- 118
1
vote
1 answer
returning LinkedHashMap from IntStream, Java 8
I have this code.
private static Map> alternativeMethod(AudioFormat audioformat,
List listChunkDTO, long index, int sizeChunk) {
int numBytesPerSample = audioformat.getSampleSizeInBits() / 8;
…
joseluisbz
- 1,491
- 1
- 36
- 58
0
votes
1 answer
How is this Eratosthenes Sieve implementation is working internally?
I found this code that seems to be the non-optimal version of the Sieve of Erastothenes, it gets the N first prime numbers into an array.
private IntPredicate p = x -> true;
private int[] primes(int n) {
return IntStream.iterate(2, i -> i…
Brando Jeanpier
- 21
- 3
0
votes
1 answer
incompatible types: bad type in conditional expression void cannot be converted to Boolean. please assist
Here is my code below.....
I am trying to use " (...)? IntStream.range(...).forEach(i->{......}):false;
public class CheckAnagram {
boolean status=false;
int countForStr1=0;
int countForStr2=0;
String str1ToLowerCase,str2ToLowerCase;
public boolean…
Tsebo Mokoena
- 3
- 3
-1
votes
1 answer
Issue with Java IntStream whilst trying to solve a codewars problem (Prime Streaming PG-13)
I signed up on codewars in March and I have finished a number of challenges. I am encountering difficulty with the following. The name is Prime Streaming (PG-13) and is highlighted below.
Create an endless stream of prime numbers - a bit like…
Hector Williams
- 13
- 2
-2
votes
3 answers
Convert array to a Map of array index to value
What's wrong with this code?
int[] nums = new int[] {8, 3, 4};
Map val2Idx =
IntStream.range(0, nums.length)
.collect(Collectors.toMap(idx -> idx, idx -> nums[idx]));
I'm hoping to produce a Map with these…
kane
- 5,465
- 6
- 44
- 72
-3
votes
2 answers
Concat different Streams and print on Java
I'm trying to print a concat Stream that includes String and Integer elements. I've try a few ways, but none of them works. I can't find a proper way to do it on internet. It's just a testing code as you can see:
import java.util.stream.*;
class…
Shinington
- 17
- 1
- 6