Streams – allMatch() operation

Stream allMatch() in Java is a short-circuiting terminal operation. Returns whether all elements of this stream match the provided predicate. The allMatch() method returns true if all elements match the given predicate, otherwise false.


  boolean allMatch(Predicate<? super T> predicate)

Java Stream allMatch() operation – examples

Example 1

A simple program that checks if all elements of the stream are even numbers:

class Test {

  public static void main(String[] args) {
    List<Integer> numbers = new ArrayList<>(Arrays.asList(2, 4, 6, 8, 10, 12, 14, 16, 18, 20));

            .allMatch(number -> number % 2 == 0));

Output: true

Example 2

A program that creates a list of User objects, then uses the allMatch() method to check if all users have a premium membership type:

class Test {

  public static void main(String[] args) {
    boolean areAllPremiumMembers = getAllUsers().stream()
            .allMatch(user -> user.getMembershipType().equals("premium"));


  private static List<User> getAllUsers() {
    List<User> users = new ArrayList<>();
    users.add(new User("John", "john123", "premium", "5th Avenue"));
    users.add(new User("Megan", "meganusr", "standard", "New Light Street"));
    users.add(new User("John", "john123", "premium", "5th Avenue"));
    users.add(new User("Melissa", "mellisa1", "premium", "Ser Kingston Street"));

    return users;

class User {
  private String name;
  private String username;
  private String membershipType;
  private String address;

  public User(String name, String username, String membershipType, String address) { = name;
    this.username = username;
    this.membershipType = membershipType;
    this.address = address;

  public String getMembershipType() {
    return membershipType;

Output: false

I hope this tutorial was helpful to you. To learn more, check out other Java Functional Programming tutorials.


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