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Java 8 Streams - Stream.anyMatch Examples

Java 8 Streams Java Java API 

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Interface:

java.util.stream.Stream

java.lang.AutoCloseableAutoCloseablejava.util.stream.BaseStreamBaseStreamjava.util.stream.StreamStreamLogicBig

Method:

boolean anyMatch(Predicate<? super T> predicate)

This is a terminal-short-circuiting operation. It checks whether any elements of this stream match the provided predicate. It will terminate (short-circuiting) with a result of 'true' when the very first element matches the provided predicate.

If the stream is empty then false is returned and the predicate is not evaluated.


Examples


package com.logicbig.example;

import java.util.stream.Stream;


public class AnyMatchExample {

    public static void main(String[] args) {
        Stream<String> stream = Stream.of("one", "two", "three", "four");
        boolean match = stream.anyMatch(s -> s.contains("our"));
        System.out.println(match);
    }
}

Output

true
Original Post




An empty stream will always return false; 

package com.logicbig.example.stream;

import java.util.Arrays;

public class AnyMatchExample {

    public static void main(String... args) {
        boolean b = Arrays.asList()
                          .stream()
                          .anyMatch(e -> true);
        System.out.println(b);
    }
}

Output

false

See Also