JAVA EE: How to use iterate method of Java 8 Stream | Java 8 streams tutorial

Monday, 17 July 2017

How to use iterate method of Java 8 Stream | Java 8 streams tutorial | Streams in Java 8

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https://www.youtube.com/watch?v=FAmZvy6zilY&list=UUhwKlOVR041tngjerWxVccw

StreamDemo1.java

import java.util.stream.Stream;

/**
 * 
 * We can use stream to iterate any number of times. Stream provides
 * predefined methods to deal with the logic you implement.
 * 
 */
public class StreamDemo1
{
    public static void main(String[] args)
    {
        Stream.iterate(1, element -> element + 1)
                .forEach(System.out::println);
    }
}

Output

1
2
3
4
5
6
7
8
9
10
11
..
..
..
..

StreamDemo2.java

import java.util.stream.Stream;

/**
 * 
 * We can use stream to iterate any number of times. Stream provides
 * predefined methods to deal with the logic you implement. In the
 * following example, we are iterating, filtering and passed a limit
 * to fix the iteration.
 * 
 */
public class StreamDemo2
{
    public static void main(String[] args)
    {
        Stream.iterate(1, element -> element + 1)
                .filter(element -> element % 10 == 0).limit(5)
                .forEach(System.out::println);

    }
}