ConcatenateStream.java

package com.levelup.java.util.stream;

import java.util.stream.DoubleStream;
import java.util.stream.IntStream;
import java.util.stream.LongStream;
import java.util.stream.Stream;

import org.junit.Test;

/**
 * This java example will demonstrate joining streams .
 * 
 * @author Justin Musgrove
 * @see <a href=
 *      'http://www.leveluplunch.com/java/examples/concatenate-stream-java8/'>Concatenate
 *      java 8 stream</a>
 */

public class ConcatenateStream {

	@Test
	public void join_stream() {

		Stream<String> stream1 = Stream.of("one", "two");
		Stream<String> stream2 = Stream.of("three", "four");

		Stream.concat(stream1, stream2).forEach(e -> System.out.println(e));
	}

	@Test
	public void join_intstream() {

		IntStream intStream1 = IntStream.of(1, 2);
		IntStream intStream2 = IntStream.of(3, 4);

		IntStream.concat(intStream1, intStream2).forEach(
				e -> System.out.println(e));
	}

	@Test
	public void join_longstreamstream() {

		LongStream longStream1 = LongStream.of(5, 6);
		LongStream longStream2 = LongStream.of(7, 8);

		LongStream.concat(longStream1, longStream2).forEach(
				e -> System.out.println(e));

	}

	@Test
	public void join_doublestream_stream() {

		DoubleStream doubleStream1 = DoubleStream.of(9, 10);
		DoubleStream doubleStream2 = DoubleStream.of(11, 12);

		DoubleStream.concat(doubleStream1, doubleStream2).forEach(
				e -> System.out.println(e));

	}

}