Click here to watch in Youtube :
https://www.youtube.com/watch?v=s2WpigBSS84&list=UUhwKlOVR041tngjerWxVccw
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How Parallel Stream works | Java 8 streams tutorial | Java 8 streams | Streams in Java 8 |
public class Student implements Comparable<Student> { private String name; private int score; public Student(String name, int score) { this.name = name; this.score = score; } public void setName(String name) { this.name = name; } public String getName() { return this.name; } public void setScore(int score) { this.score = score; } public int getScore() { return this.score; } public String toString() { return this.name + " - " + this.score; } public int compareTo(Student another) { return another.getScore() - this.score; } }StreamDemo.java
import java.util.ArrayList; import java.util.List; public class StreamDemo { public static void main(String[] args) { List<Student> studentList = new ArrayList<>(); studentList.add(new Student("Alice", 82)); studentList.add(new Student("Bob", 90)); studentList.add(new Student("Carol", 67)); studentList.add(new Student("David", 80)); studentList.add(new Student("Eric", 55)); studentList.add(new Student("Frank", 49)); studentList.add(new Student("Gary", 88)); studentList.add(new Student("Henry", 98)); studentList.add(new Student("Ivan", 66)); studentList.add(new Student("John", 52)); /* * The following code may execute stream operations in * parallel */ studentList.parallelStream().filter(s -> s.getScore() >= 80) .sorted().limit(3).forEach(System.out::println); System.out.println("------------------------------"); /* * The Collection’s stream() method returns a sequential * stream. We can convert a sequential stream to a parallel * stream by calling the parallel() method on the current * stream. * * The following example shows a stream executes the sorted * operation sequentially, and then execute the filter * operation in parallel */ studentList.stream().sorted().parallel() .filter(s -> s.getScore() >= 80) .forEach(System.out::println); } }Output
Bob - 90 Henry - 98 Gary - 88 ------------------------------ Gary - 88 David - 80 Alice - 82 Bob - 90 Henry - 98Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/StreamDemo_student_parallelstream.zip?attredirects=0&d=1
Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StreamDemo_student_parallelstream
Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/5eb462211ac2fd9fb1bace2049e170a49c5caa69/BasicJava/StreamDemo_student_parallelstream/?at=master
See also:
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