Stream forEach(Consumer action) performs an action for each element of the stream. Stream forEach(Consumer action) is a terminal operation i.e, it may traverse the stream to produce a result or a side-effect.
Syntax :
void forEach(Consumer<? super T> action) Where, Consumer is a functional interface and T is the type of stream elements.
Note : The behavior of this operation is explicitly nondeterministic. Also, for any given element, the action may be performed at whatever time and in whatever thread the library chooses.
Example 1 : To perform print operation on each element of reversely sorted stream.
// Java code for forEach// (Consumer action) in Java 8import java.util.*;  class GFG {      // Driver code    public static void main(String[] args)    {          // Creating a list of Integers        List<Integer> list = Arrays.asList(2, 4, 6, 8, 10);          // Using forEach(Consumer action) to        // print the elements of stream        // in reverse order        list.stream().sorted(Comparator.reverseOrder()).forEach(System.out::println);    }} |
Output:
10 8 6 4 2
Example 2 : To perform print operation on each element of string stream.
// Java code for forEach// (Consumer action) in Java 8import java.util.*;  class GFG {      // Driver code    public static void main(String[] args)    {          // Creating a list of Strings        List<String> list = Arrays.asList("GFG", "Geeks",                                          "for", "Lazyroar");          // Using forEach(Consumer action) to        // print the elements of stream        list.stream().forEach(System.out::println);    }} |
Output:
GFG Geeks for Lazyroar
Example 3 : To perform print operation on each element of reversely sorted string stream.
// Java code for forEach// (Consumer action) in Java 8import java.util.*;import java.util.stream.Stream;  class GFG {      // Driver code    public static void main(String[] args)    {          // Creating a Stream of Strings        Stream<String> stream = Stream.of("GFG", "Geeks",                                          "for", "Lazyroar");          // Using forEach(Consumer action) to print        // Character at index 1 in reverse order        stream.sorted(Comparator.reverseOrder())            .flatMap(str -> Stream.of(str.charAt(1)))            .forEach(System.out::println);    }} |
Output:
o e e F
