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Java 8 Streams - IntStream.asLongStream Examples

[Last Updated: Nov 8, 2025]

Java 8 Streams Java Java API 

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Interface:

java.util.stream.IntStream

java.lang.AutoCloseableAutoCloseablejava.util.stream.BaseStreamBaseStreamjava.util.stream.IntStreamIntStreamLogicBig

Method:

LongStream asLongStream()

This intermediate operation returns a LongStream consisting of the elements of this stream, converted to long.


Examples


package com.logicbig.example.intstream;

import java.util.stream.IntStream;
import java.util.stream.LongStream;

public class AsLongStreamExample {

    public static void main(String... args) {
        IntStream intStream = IntStream.of(1, 2, 3, 2, 5, 4);
        LongStream longStream = intStream.asLongStream();
        longStream.forEach(System.out::println);
    }
}

Output

1
2
3
2
5
4




package com.logicbig.example.intstream;

import java.util.stream.IntStream;
import java.util.stream.LongStream;

public class AsLongStreamExample2 {

    public static void main(String... args) {
        IntStream intStream = IntStream.of(1, 2, 3, 2, 5, 4);
        LongStream longStream = intStream.peek(AsLongStreamExample2::print)
                                         .asLongStream();
        longStream.forEach(AsLongStreamExample2::print);
    }

    private static void print(int i) {
        System.out.println("int: " + i);
    }

    private static void print(long l) {
        System.out.println("long: " + l);
    }
}

Output

int: 1
long: 1
int: 2
long: 2
int: 3
long: 3
int: 2
long: 2
int: 5
long: 5
int: 4
long: 4

See Also