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Java 8 Streams - Stream.forEachOrdered 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:

void forEachOrdered(Consumer<? super T> action)

This terminal operation performs an action for each element of this stream, in the encounter order of the stream if the stream has a defined encounter order.


Examples


package com.logicbig.example.stream;

import java.util.stream.Stream;

public class ForEachOrderedExample {

    public static void main(String... args) {
        String[] s = {"one", "two", "three", "four"};
        runForEach(Stream.of(s));
        runForEachOrdered(Stream.of(s));
    }

    private static void runForEach(Stream<String> stream) {
        System.out.println("-- running unordered --");
        stream.forEach(System.out::println);
    }

    private static void runForEachOrdered(Stream<String> stream) {
        System.out.println("-- running ordered --");
        stream.forEachOrdered(System.out::println);
    }
}

Output

-- running unordered --
one
two
three
four
-- running ordered --
one
two
three
four




For parallel stream 

package com.logicbig.example.stream;

import java.util.stream.Stream;

public class ForEachOrderedExample2 {
    public static void main(String... args) {
        String[] s = {"one", "two", "three", "four"};
        runForEach(Stream.of(s).parallel());
        runForEachOrdered(Stream.of(s).parallel());
    }

    private static void runForEach(Stream<String> stream) {
        System.out.println("-- running unordered --");
        stream.forEach(System.out::println);
    }

    private static void runForEachOrdered(Stream<String> stream) {
        System.out.println("-- running ordered --");
        stream.forEachOrdered(System.out::println);
    }
}

Output

-- running unordered --
three
four
one
two
-- running ordered --
one
two
three
four

See Also