Stream forEach() method in Java with examples (original) (raw)

Last Updated : 23 Jan, 2026

The Stream.forEach(Consumer action) method performs a given action on each element of the stream. It is a terminal operation, which may traverse the stream to produce a result or a side effect.

Example:

Java `

import java.util.Arrays; import java.util.List;

public class Main { public static void main(String[] args) { List numbers = Arrays.asList(1, 2, 3, 4, 5);

    // Print each number in the list using forEach
    numbers.stream().forEach(System.out::print);
}

}

**Explanation:

numbers.stream() creates a stream from the list.
forEach(System.out::println) prints each number.

Syntax

void forEach(Consumer<? super T> action)

**Parameters: "action" a Consumer functional interface defining the operation to perform on each element.
**Return Value: None (void) - this is a terminal operation.

**Example 1: Print Each Element of a Reversely Sorted Integer Stream

Java `

import java.util.*;

class GFG { public static void main(String[] args) { List list = Arrays.asList(2, 4, 6, 8, 10);

    // Sort in reverse order and print each element
    list.stream()
        .sorted(Comparator.reverseOrder())
        .forEach(System.out::println);
}

}

**Explanation:

sorted(Comparator.reverseOrder()) sorts the elements in descending order.
forEach(System.out::println) prints each element of the stream.

**Example 2: Print Each Element of a String Stream

Java `

import java.util.*;

class GFG { public static void main(String[] args) { List list = Arrays.asList("GFG", "Geeks", "for", "GeeksforGeeks");

    // Print each string in the stream
    list.stream().forEach(System.out::println);
}

}

Output

GFG Geeks for GeeksforGeeks

**Explanation: forEach(System.out::println) applies the print operation to each element.

**Example 3: Print Character at Index 1 from Reversely Sorted String Stream

Java `

import java.util.*; import java.util.stream.Stream;

class GFG { public static void main(String[] args) { Stream stream = Stream.of("GFG", "Geeks", "for", "GeeksforGeeks");

    // Sort strings in reverse order, extract character at index 1, and print
    stream.sorted(Comparator.reverseOrder())
          .flatMap(str -> Stream.of(str.charAt(1)))
          .forEach(System.out::println);
}

}

**Explanation:

sorted(Comparator.reverseOrder()) sorts the strings in descending order.
flatMap(str -> Stream.of(str.charAt(1))) extracts the character at index 1 from each string.
forEach(System.out::println) prints each extracted character.