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Peek method of Java 8 Stream | Java 8 streams tutorial | Java 8 streams | Streams in Java 8

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Ram N

Posts: 2649
Nickname: ramram
Registered: Jul, 2014

Ram N is Java Programmer
Peek method of Java 8 Stream | Java 8 streams tutorial | Java 8 streams | Streams in Java 8 Posted: Aug 29, 2017 9:54 AM
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This post originated from an RSS feed registered with Java Buzz by Ram N.
Original Post: Peek method of Java 8 Stream | Java 8 streams tutorial | Java 8 streams | Streams in Java 8
Feed Title: JAVA EE
Feed URL: http://ramj2ee.blogspot.com/feeds/posts/default?alt=rss
Feed Description: This blog has viedo tutorials and Sample codes related to below Technologies. 1.J2EE 2.Java 3.Spring 4.Hibernate 5.Database 6.Oracle 7.Mysql 8.Design Patterns
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StreamPeekDemo.java
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class StreamPeekDemo
{
public static void main(String[] args)
{

/*
* peek(): This method exists mainly to support debugging,
* where you want to see the elements as they flow past a
* certain point in a pipeline
*/

Stream.of("one", "two", "three", "four")
.filter(e -> e.length() > 3)
.peek(e -> System.out.println("Filtered value: " + e))
.map(String::toUpperCase)
.peek(e -> System.out.println("Mapped value: " + e))
.collect(Collectors.toList());

}
}
Output
Filtered value: three
Mapped value: THREE
Filtered value: four
Mapped value: FOUR

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/StreamDemo_peek_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StreamDemo_peek_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/07d37f967453de17efa70af5825dc03ae2d5a7c0/BasicJava/StreamDemo_peek_App/?at=master

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  • Read: Peek method of Java 8 Stream | Java 8 streams tutorial | Java 8 streams | Streams in Java 8

    Topic: How to find the sum using reduce method of Java 8 Stream | Streams in Java 8 Previous Topic   Next Topic Topic: Code Smells: Mutation


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