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Java 8 Streams - LongStream.boxed Examples

[Last Updated: Nov 8, 2025]

Java 8 Streams Java Java API

Interface:

java.util.stream.LongStream

Method:

Stream<Long> boxed()

This intermediate operation returns a Stream consisting of the elements of this stream, each boxed to an Long.

Examples

package com.logicbig.example.longstream;

import java.util.stream.LongStream;
import java.util.stream.Stream;

public class BoxedExample {

    public static void main(String... args) {
        LongStream stream = LongStream.of(3, 6, 9);
        Stream<Long> boxed = stream.boxed();
        boxed.forEach(System.out::println);
    }
}

Output

3
6
9

package com.logicbig.example.longstream;

import java.util.stream.LongStream;
import java.util.stream.Stream;

public class BoxedExample2 {

    public static void main(String... args) {
        LongStream stream1 = LongStream.of(3, 6, 9);
        Stream<String> stream2 = Stream.of("two", "four");
        Stream.concat(stream1.boxed(), stream2)
              .forEach(System.out::println);
    }
}

Output

3
6
9
two
four

See Also