🎓 Top 15 Udemy Courses (80-90% Discount): My Udemy Courses - Ramesh Fadatare — All my Udemy courses are real-time and project oriented courses.
▶️ Subscribe to My YouTube Channel (178K+ subscribers): Java Guides on YouTube
▶️ For AI, ChatGPT, Web, Tech, and Generative AI, subscribe to another channel: Ramesh Fadatare on YouTube
The boxed() method in Java, part of the java.util.stream.LongStream interface, is used to convert a primitive LongStream into a Stream<Long>. This method is useful when you need to work with streams of objects rather than primitive values, allowing you to use object-specific methods and collections.
Table of Contents
- Introduction
boxed()Method Syntax- Understanding
boxed() - Examples
- Basic Usage
- Using
boxed()in Combination with Other Stream Operations
- Real-World Use Case
- Conclusion
Introduction
The boxed() method converts each element of a LongStream into its corresponding Long object. This is particularly useful when you need to collect the elements into a collection that works with objects, such as a List<Long>.
boxed() Method Syntax
The syntax for the boxed() method is as follows:
Stream<Long> boxed()
Parameters:
- This method does not take any parameters.
Returns:
- A
Stream<Long>consisting of the elements of the originalLongStream, each boxed to aLongobject.
Throws:
- This method does not throw any exceptions.
Understanding boxed()
The boxed() method converts each element of the primitive LongStream to its corresponding Long object, effectively transforming a stream of primitive long values into a stream of Long objects. This conversion is necessary when you need to use object-specific methods or work with APIs that expect objects rather than primitives.
Examples
Basic Usage
To demonstrate the basic usage of boxed(), we will create a LongStream and convert it to a Stream<Long>.
Example
import java.util.stream.LongStream;
import java.util.stream.Stream;
public class BoxedExample {
public static void main(String[] args) {
LongStream longStream = LongStream.of(1L, 2L, 3L, 4L, 5L);
// Use boxed() to convert the LongStream to a Stream<Long>
Stream<Long> boxedStream = longStream.boxed();
// Print the elements of the Stream<Long>
boxedStream.forEach(System.out::println);
}
}
Output:
1
2
3
4
5
Using boxed() in Combination with Other Stream Operations
This example shows how to use boxed() in combination with other stream operations, such as collecting the elements into a list.
Example
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.LongStream;
public class BoxedWithCollectExample {
public static void main(String[] args) {
LongStream longStream = LongStream.of(10L, 20L, 30L, 40L, 50L);
// Use boxed() to convert the LongStream to a Stream<Long> and collect it into a List<Long>
List<Long> list = longStream.boxed().collect(Collectors.toList());
// Print the elements of the list
list.forEach(System.out::println);
}
}
Output:
10
20
30
40
50
Real-World Use Case
Storing Long Values in a List
In real-world applications, the boxed() method can be used to store long values in a list for further processing, such as saving transaction amounts in a list.
Example
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.LongStream;
public class BoxedRealWorldExample {
public static void main(String[] args) {
LongStream transactionAmounts = LongStream.of(1000L, 2000L, 1500L, 3000L, 2500L);
// Use boxed() to convert the LongStream to a Stream<Long> and collect it into a List<Long>
List<Long> transactions = transactionAmounts.boxed().collect(Collectors.toList());
// Print the elements of the list
transactions.forEach(System.out::println);
}
}
Output:
1000
2000
1500
3000
2500
Conclusion
The LongStream.boxed() method is used to convert a primitive LongStream into a Stream<Long>. This method is particularly useful for working with streams of objects rather than primitive values, allowing you to use object-specific methods and collections. By understanding and using this method, you can efficiently manage and process streams of values in your Java applications, ensuring compatibility with APIs and collections that expect objects.
My Top and Bestseller Udemy Courses. The sale is going on with a 70 - 80% discount. The discount coupon has been added to each course below:
Build REST APIs with Spring Boot 4, Spring Security 7, and JWT
![[NEW] Learn Apache Maven with IntelliJ IDEA and Java 25](https://img-c.udemycdn.com/course/750x422/6852721_b512_2.jpg "[NEW] Learn Apache Maven with IntelliJ IDEA and Java 25")
[NEW] Learn Apache Maven with IntelliJ IDEA and Java 25
ChatGPT + Generative AI + Prompt Engineering for Beginners
Spring 7 and Spring Boot 4 for Beginners (Includes 8 Projects)
Available in Udemy for Business
Building Real-Time REST APIs with Spring Boot - Blog App
Available in Udemy for Business
Building Microservices with Spring Boot and Spring Cloud
Available in Udemy for Business
Java Full-Stack Developer Course with Spring Boot and React JS
Available in Udemy for Business
Build 5 Spring Boot Projects with Java: Line-by-Line Coding
Testing Spring Boot Application with JUnit and Mockito
Available in Udemy for Business
Spring Boot Thymeleaf Real-Time Web Application - Blog App
Available in Udemy for Business
Master Spring Data JPA with Hibernate
Available in Udemy for Business
Spring Boot + Apache Kafka Course - The Practical Guide
Available in Udemy for Business
Comments
Post a Comment
Leave Comment