Java null check

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How To Check If An Object Reference Is Null Or Not? | Java Tips And Tricks

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Usually we use if statement combined with or != operators to check if an object reference is null or not. We do this to validate arguments passed to constructors or methods doesn’t contain a null value. The solution is to use the java.util.Objects class. This static utility class provides methods like requireNonNull() to check if the specified object reference is not null. If null it will throw a NullPointerException. #javaprogramming #javatutorial #javatutorialforbeginners About AsappJobs: AsappJobs is building an education content marketplace platform called letsgrow.tech. Monetise your knowledge & doubts! For more details please visit: website: letsgrow.tech linkedIn page : 🤍 facebook page : 🤍 twitter page : 🤍 _ Visit to our playlist for more interesting videos: Data Structures & Algorithms Complete Course 2020 🔥 (Designed To Crack Interviews): 🤍 System Design By Industry Experts: 🤍 System Design Mini Series By Experts: 🤍 How To Crack Graph Interview: 🤍 System Design Interview Preparation: 🤍 Hands On With Microsoft Azure: 🤍 Cloud Computing: 🤍 Interview With Selected Candidate: 🤍 Interview Tips And Questions By Selected Candidate: 🤍 Java Interview Questions & Answers: 🤍 Java Fundamentals And Internal Mechanism: 🤍 Data Structure And Algorithms Interview Questions And Answers: 🤍 Data Structure And Algorithms Interview Q&A (Quick Prep): 🤍 Interview Puzzles: 🤍 Interview Preparation Complete Guidelines: 🤍 Data Structure and Algorithms Full Course: 🤍 –––––––––––––––––––––––––––– contact details: Email ID: rajeev🤍asappjobs.com ––––––––––––––––––––––––––––– Please like, comment and share this video to your network and don't forgot to subscribe and hit the bell icon ;) Thanks, AsappJobs Team

Null Keyword in Java (Tutorial)

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Full Java Course: 🤍 If you're new to programming, I HIGHLY RECOMMEND solving challenges on Edabit: 🤍 I recommend installing Tabnine autocomplete on your IDE (free and saves you time): 🤍 Disclosure: Edabit and Tabnine links provided are linked to my affiliate accounts & support the channel. The null keyword in java lets you make a String or object empty. String a = null; Now if you try to use a method on "a", you will get a null pointer exception. You can't make a primitive type null. I hope you enjoyed this null java tutorial! Free tips and programs: 🤍 Try my Java course for free: 🤍 Recommended Channels to Subscribe to Career Karma: 🤍 TheNewBoston: 🤍 ~ 🤍 🤍 🤍 (2nd channel) Alex Lee

Optional in java 8 | Null check in java 8

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Hello, Welcome to this channel, This Channel is mainly designed to focus on improving software Engineers existing skills and enhance their Interview skills, This Channel is for both Freshers and experience who wants to get job or want to groom their existing skills. About This Video : - In this video are going to learn how to use java 8 Optional class and its method Optional.ofNullable(Object).ifPresent() is detail with practical example. Also use of isPresent() in the same program. We have performed Stream on Array and printed employee information related to company. #java8Tutorial #nullCheckInJava8 #ispresentVsIfpresent Please Subscribe this channel Please Like This video and share this Video Thank you!

Null Pointer Exceptions In Java - What EXACTLY They Are and How to Fix Them

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Full tutorial for Null Pointer Exceptions in Java. Complete Java course: 🤍 Null Pointer Exceptions! Every Java programmer has run into this dreaded Exception. But what exactly causes a NullPointerException in Java? We'll talk about What a null pointer exception is, how to fix it, and how to avoid them in our Java code. NullPointerExceptions can be scary and confusing, but they're simple to fix as long as you understand why they happen. Learn or improve your Java by watching it being coded live! Hi, I'm John! I'm a Lead Java Software Engineer and I've been in the programming industry for more than a decade. I love sharing what I've learned over the years in a way that's understandable for all levels of Java learners. Let me know what else you'd like to see! Links to any stuff in this description are affiliate links, so if you buy a product through those links I may earn a small commission. 📕 THE best book to learn Java, Effective Java by Joshua Bloch 🤍 📕 One of my favorite programming books, Clean Code by Robert Martin 🤍 🎧 Or get the audio version of Clean Code for FREE here with an Audible free trial 🤍 🖥️Standing desk brand I use for recording (get a code for $30 off through this link!) 🤍 📹Phone I use for recording: 🤍 🎙️Microphone I use (classy, I know): 🤍 Donate with PayPal (Thank you so much!) 🤍 ☕Complete Java course: 🤍 🤍

JAVA String Validation: NULL , EMPTY and BLANK

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Rule N° 1 Ban all NullPointerExceptions! Watch full video to know how to check for null, empty and blank Strings in java and the order in which they should be done. "𝑀𝑎𝑠𝑡𝑒𝑟𝑖𝑛𝑔 𝑡ℎ𝑒 𝑏𝑎𝑠𝑖𝑐𝑠 𝑔𝑖𝑣𝑒𝑠 𝑢𝑠 𝑡ℎ𝑒 𝑝𝑜𝑡𝑒𝑛𝑡𝑖𝑎𝑙 𝑡𝑜 𝑓𝑙𝑦 " 𝑳𝑬𝑻'𝑺 𝑪𝑶𝑵𝑵𝑬𝑪𝑻 𝒀𝒐𝒖𝑻𝒖𝒃𝒆: 🤍 𝑭𝒂𝒄𝒆𝒃𝒐𝒐𝒌: 🤍 𝑰𝒏𝒔𝒕𝒂𝒈𝒓𝒂𝒎: 🤍 #JavaBeginners #StringValidation #YesSheCodes

Null Pointer Exception Java Fix

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Full Java Course: 🤍 If you want to be a Software Engineer, I HIGHLY RECOMMEND applying for the Springboard Software Engineering BootCamp (Use my code AlexLee for $1000 USD off): 🤍 Free tips: 🤍 If you're new to programming, I recommend solving challenges on Edabit: 🤍 Get my favorite programming audiobook for free! 🤍 20% off Brain.fm (my productivity hack): 🤍 20% off Brilliant: 🤍 Get Tabnine autocomplete for free: 🤍 Get SERVICE HOURS as an online tutor or get FREE ONLINE TUTORING for K-8 students: 🤍 This is how you can fix your null pointer exception in java! ✅Hopefully, what I've taught you will help you fix your null pointer exception. Learn java in just 13 minutes: 🤍 If your null pointer exception in java points at code that looks something like: something.doSomething(); Double check your "something" object, maybe it's not setup correctly. It might not have anything in it, causing "doSomething()" to try to do an action on nothing. The name of a null pointer exception is something like: java.lang.nullpointerexception This null pointer exception java code can be tricky at first... But SURELY you'll get it :) If you followed along, congrats! You learned-by-doing! I hope you enjoyed this tutorial on for this null pointer exception java fix! I like to have a nice mix of tutorials and actual projects for you all :) Do you want to learn how to write java code from scratch, in Java? Check out my Java Tutorial For Beginners: 🤍 Was this able to fix your null pointer exception? - Disclosure: Springboard, Brilliant, Audible, Brain.fm, Edabit and Tabnine links provided are linked to my affiliate accounts & support the channel. ~ 🤍 Alex Lee

Optional Class in Java 8 - Avoid Null Pointer Exception | Java 8 Features | Crash Course ✅

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Java introduced a new class Optional in JDK 8. It is a public final class and is used to deal with NullPointerException in Java applications. The purpose of the class is to provide a type-level solution for representing optional values instead of using null references. Advantages of Java 8 Optional - Null checks are not required. - No more NullPointerException at run-time. - We can develop a clean and neat APIs. - No more Boilerplate code Java Lambda Expressions | Java 8 Features | Crash Course ✅ at 🤍 Java Functional Interfaces | Java 8 Features | Crash Course ✅ at 🤍 Java Method References | Java 8 Features | Crash Course ✅ at 🤍 Java Optional Class | Java 8 Features | Crash Course ✅ at 🤍 Java 8 Stream API Tutorial | Examples | Crash Course ✅ at 🤍 Java 8 Tutorial | Java 8 Features in One Video | 4 Hours Full Course 🔥 at 🤍 Complete Java 8 Tutorial at 🤍 #java #java8 #javaguides

java 8 tutorial : How to filter null values from Stream in java?

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#learnwithkrishnasandeep #javacodinginterviewquestions #javaexamples #javaprograms #javatutorials #javaprogramming public static boolean nonNull(Object obj) Returns true if the provided reference is non-null otherwise returns false. API Note: This method exists to be used as a Predicate, filter(Objects::nonNull) Parameters: obj - a reference to be checked against null Returns: true if the provided reference is non-null otherwise false filter null values from stream java, filter null values stream java, filter null in stream java, java stream filter null values, java stream filter null value, java 8 stream filter null values

What Does Null Mean? - Intro to Java Programming

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This video is part of an online course, Intro to Java Programming. Check out the course here: 🤍

Java. Проблема с null. Null safety.

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В этом видео я рассказываю о проблеме с null в языке программирования Java, из-за которой возникает печально известное NullPointerExeption. Даю некоторые рекомендации по организации кода для борьбы с этой проблемой и повышения надежности работы программ.

JavaScript for Developers 13 - Understanding null

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Access the full course here: 🤍 In this video, we'll learn about another unique primitive type in JavaScript called null.

Java 8||Predicate Example to Remove null Values and empty String from the given List || by Durga

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Oracle Java Certification: Shortest Way To Crack OCA 1Z0-808 Just 🤍 Rs 640/- 1. For Java SE 8 Programmer I Exam 2. Topic wise Tests and Grand Tests 3. 280 Realistic Questions With Clear Explanation 4. Study Material (408 Pages) 5. Question Bank (107 Pages) 6. Videos (63 Sessions) Use the below links to access Durga Sir Videos and Downloadable Materials and Topic wise Tests and Grand Tests with Life-Time Access. 1. Oracle Java Certification: Shortest Way To Crack OCA 1Z0-808 Link: 🤍 2. Java 8 New Features In Simple Way Link: 🤍 3. Java 9 New Features In Simple Way: JShell, JPMS and More Link: 🤍 4. Complete JDBC Programming Part-1 Link: 🤍 5. Complete JDBC Programming Part-2 Link: 🤍

What is null and a null pointer exception? (Java Tutorial)

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This Java tutorial for beginners explains the null value, how it works, and how to avoid a null pointer exception. java.lang.nullpointerexception nullpointerexception Aligned to AP Computer Science A. 🔥 Subscribe To Get More Tutorials: 🤍 🔥 #Java #JavaTutorial #JavaTutorials

Why does my java code throw a null pointer exception - how to fix?

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A common reason for Null Pointer Exceptions in Java is a variable redeclaration instead of instantiation. Learn what that means, how to avoid it, and how to spot it, in this presentation. # FAQ - why does my code throw a null pointer exception - common reason #1 Redeclaration - Using `🤍BeforeClass` or `🤍Before` can setup data for use in tests - Any 'variables' we instantiate need to be 'fields' rather than variables - We want to instantiate them in the setup method rather than redeclare them # Automatically Refactor prior to using `🤍Before...` - I might still want to use an `🤍BeforeClass` or `🤍Before` - To make the code readable - I could do that - but I don't think I would have declared a new variable after the refactorings because I have a working code example that I'm moving. # In General - Try to write one test at a time so that if you have a problem it is easier to identify where the problem is - Try to write working isolated tests and then refactor to a more general solution when you need it - that way, you know it was working, so you just have to work backwards to find out what went wrong - Try to use automated IDE refactoring rather than move code around manually - Use the IDE syntax highlighting to help spot any issues For more details see Blog Post: - 🤍 - 🤍 SlideShare: 🤍

Important LoopHoles of null and NullPointerException in Java Part - 1

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Java Tutorial - 11 - Validating User Input

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In this Video I will be showing you how to validate user input, to avoid mis matching variables, and stop your programs from crashing. Remember to follow me on Google+ 🤍 If you are new to Java go check out the playlist for the series, and get caught up on everything you need to know about Java: 🤍 Just a reminder that my website is currently not available.

Null String vs Empty String in Java

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This tutorial explains the difference between NULL and empty string.

Java Optionals | Crash Course

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Java Optionals allows you to eliminate NullPointerExceptions throughout your codebase and create client AP's that are easy to interpret what is provided and what might be provided. The benefits of optionals are: ➡️ Declarative programming ✅ ➡️ Clarifies Intent ✅ ➡️ Removes Uncertainty ✅ ➡️ Functional Programming ✅ Follow me on Instagram 🤍amigoscode: 🤍 PS: Don't forget to subscribe

Java Strings are Immutable - Here's What That Actually Means

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Java String are Immutable - but what does that really mean? We'll learn why Strings are immutable in Java, and what it means for your Java programs. String immutability in Java means that String objects cannot be modified after they're created. Let's talk about why it matters that Strings are immutable, and why Java chose to make them immutable in this beginner video lesson tutorial. Learn or improve your Java by watching it being coded live! Hi, I'm John! I'm a Lead Java Software Engineer and I've been in the programming industry for more than a decade. I love sharing what I've learned over the years in a way that's understandable for all levels of Java learners. Let me know what else you'd like to see! Links to any stuff in this description are affiliate links, so if you buy a product through those links I may earn a small commission. 📕 THE best book to learn Java, Effective Java by Joshua Bloch 🤍 📕 One of my favorite programming books, Clean Code by Robert Martin 🤍 🎧 Or get the audio version of Clean Code for FREE here with an Audible free trial 🤍 🖥️Standing desk brand I use for recording (get a code for $30 off through this link!) 🤍 📹Phone I use for recording: 🤍 🎙️Microphone I use (classy, I know): 🤍 Donate with PayPal (Thank you so much!) 🤍 ☕Complete Java course: 🤍 🤍

Optionals In Java - Simple Tutorial

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Full tutorial on Optionals in Java! Thanks to FlexiSpot for sponsoring! 🖥️ Get your coupon code for an extra $30 OFF through my link: 🤍 FlexiSpot Pro Plus Standing Desk E7 🤍 (US site) 🤍 (CAN site) Join FlexiSpot Member Day during 29-30th June 2022! Up to $100 OFF! 🤍 #MyFlexiDesk #flexiblewfh Complete Java course: 🤍 Optionals were added in Java 8, but can be a confusing thing to learn. This tutorial will walk through all of the aspects of Optionals in Java detail, then walk through step by step when and how to use optionals in your own code! If you're confused by Optionals in Java, either just what they are and why they exist in general, or how to code to use them in Java, you're in the right place! Learn or improve your Java by watching it being coded live! Hi, I'm John! I'm a Lead Java Software Engineer and I've been in the programming industry for more than a decade. I love sharing what I've learned over the years in a way that's understandable for all levels of Java learners. Let me know what else you'd like to see! Links to any stuff in this description are affiliate links, so if you buy a product through those links I may earn a small commission. 📕 THE best book to learn Java, Effective Java by Joshua Bloch 🤍 📕 One of my favorite programming books, Clean Code by Robert Martin 🤍 🎧 Or get the audio version of Clean Code for FREE here with an Audible free trial 🤍 🖥️Standing desk brand I use for recording (get a code for $30 off through this link!) 🤍 📹Phone I use for recording: 🤍 🎙️Microphone I use (classy, I know): 🤍 Donate with PayPal (Thank you so much!) 🤍 ☕Complete Java course: 🤍 🤍

Null safety in Dart - Introduction

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Dart is becoming null safe. In this video, we're going to introduce the concept and why it's valuable. You'll learn about the basics, including syntax. As of the release of this video, in November 2020, Dart null safety is in beta. This means you are free to experiment with the feature but should not use it in production apps. To learn more, visit → 🤍 Learn everything about Flutter at → 🤍 Subscribe to Flutter! → 🤍 #dart #darttopic

What Does Null Mean? - Intro to Java Programming

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This video is part of an online course, Intro to Java Programming. Check out the course here: 🤍

Optional in Java 8: Why and When to use?

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#Optional #Java8 In this video, we are going to understand the need for java 8 Optional class and with an example, we will see when and how to use it to make the best of it. - Link to Optional class java documentation - 🤍 -

java.lang.NullPointerException Example – How to handle Java Null Pointer Exception

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Interested to learn more about java.lang.NullPointerException in Java? Then check out our detailed video on Java Null Pointer Exception, through detailed examples. Java.lang.NullPointerException is one of the most common exceptions thrown in Java Programs and it is vital that programmers know how to handle it. JCG Related Articles: 🤍 Sections: 00:00 - What null is 03:30 - Nullpointerexception example 04:45 - Ways to avoid/handle Nullpointerexception 05:00 - Check with if 07:20 - Ternary operator 11:20 - Throwing exception on null 12:45 - Optionals 15:50 - Nullpointerexception with Maps 19:10 - Assertion 21:00 - InstanceOf Instructor Mike Møller Nielsen: Mike was born in 1977 in Kolding / Denmark and he has a passion for programming and tech in general. He works on freelance basis mostly in Denmark where he develops full stack applications mostly written in Java with Spring Boot. He has a bachelor in Chemistry which he took before migrating to IT engineering. He has a YouTube channel where he spreads the knowledge and solutions to every day problems. YouTube: 🤍 LinkedIn: 🤍 Site: 🤍 Visit 🤍 for the best Java tutorials around. Follow Us: RSS: 🤍 Facebook: 🤍 Twitter: 🤍 LinkedIn: 🤍 #Java #JavaTutorial #JavaProgramming #LearnJava #Java.Lang.NullpointerException

Handling null and upgrading past Java 8 - Inside Java Newscast #7

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#Java #OpenJDK #JDK Dealing with `null` is never fun, so in this newscast, I explain how to best handle it, what tools can do, and how recent and upcoming language changes help dealing with it. I'll also look at a recent blog post about how Netflix upgraded from Java 8 to 16. ⎯⎯⎯⎯⎯⎯ Chapters ⎯⎯⎯⎯⎯⎯ 0:00 Intro JEP Cafe #1: 🤍 0:59 `null` in Java Reddit thread: 🤍 1:30 `null` in Java - The Problem with... "Null References: The Billion Dollar Mistake" by Tony Hoare: 🤍 2:16 `null` in Java - How to handle... IntelliJ: 🤍 Eclipse: 🤍 SonarQube: 🤍 SpotBugs: 🤍 PMD: 🤍 NullAway: 🤍 Checker Framework: 🤍 Which to use: 🤍 JSpecify: 🤍 Kevin B9n's presentation: 🤍 4:19 `null` in Java - How changes helps with... Type patterns: 🤍 JEP 406: 🤍 JEP 401: 🤍 5:48 Updating past Java 8 "The Impossible Java 11": 🤍 Carl on Twitter: 🤍 Nicolai on Twitter: 🤍 6:22 Updating past Java 8 - it's possible "Planning Your Java 9 Update": 🤍 7:19 Updating past Java 8 - it's necessary 8:00 Updating past Java 8 - it's beneficial 9:17 Outro ⎯⎯⎯⎯⎯⎯ Image Credits ⎯⎯⎯⎯⎯⎯ Ryan Gosling: 🤍 (CC-BY 2.0 🤍 James Gosling: 🤍 Tony Hoare: 🤍 (CC-BY-SA 2.0 FR: 🤍 Coffee Stains: 🤍 (Unsplach License: 🤍

Java Unit Testing with JUnit - Tutorial - How to Create And Use Unit Tests

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Full tutorial on creating Unit Tests in Java with JUnit! Do you write Java code that you're just not confident is 100% right? You can create unit tests using the JUnit testing framework to verify your Java code, and I'll show you exactly how to do it. Many beginners don't know there's a great way to test their code with simple, fast tests and make sure their code is working exactly how they think it is. The IntelliJ testing tools also make creating and running your Unit Tests super simple. In this beginner's Java tutorial video, we'll do a full walkthrough of why and how you can create your own unit tests! Learn or improve your Java by watching it being coded live! Hi, I'm John! I'm a Lead Java Software Engineer and I've been in the programming industry for more than a decade. I love sharing what I've learned over the years in a way that's understandable for all levels of Java learners. Let me know what else you'd like to see! Links to any stuff in this description are affiliate links, so if you buy a product through those links I may earn a small commission. 📕 THE best book to learn Java, Effective Java by Joshua Bloch 🤍 📕 One of my favorite programming books, Clean Code by Robert Martin 🤍 🎧 Or get the audio version of Clean Code for FREE here with an Audible free trial 🤍 🖥️Standing desk brand I use for recording (get a code for $30 off through this link!) 🤍 📹Phone I use for recording: 🤍 🎙️Microphone I use (classy, I know): 🤍 Donate with PayPal (Thank you so much!) 🤍 ☕Complete Java course: 🤍 🤍

Learn Java Optionals in 6 minutes | Functional Programming in Java

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#sponsored Learn how to use Java Optionals to make your code more secure - and prevent those null pointer exceptions! Thank you Pluralsight for sponsoring this video! Check out my #bitbattle on automation with Michael Bender Bit Battle: 🤍 Vote: 🤍 #bitbattles TikTok for programming tips on the go 🤍 Also check out... Make a Google Action 🤍 What is a Framework? 🤍 What is a JSON Object? 🤍 What is an API? 🤍 What are API Keys? 🤍 Using APIs with Postman 🤍 Support me on Patreon! 🤍 Check out my Python Basics course on Highbrow! 🤍 Free HACKATHON MODE playlist: 🤍 MY FAVORITE THINGS: Stitch Fix Invite Code: 🤍 FabFitFun Invite Code: 🤍 Uber Invite Code: kathrynh1277ue Postmates Invite Code: 7373F SoulCycle Invite Code: 🤍 Rent The Runway: 🤍 Want to BINGE?? Check out these playlists... Quick Code Tutorials: 🤍 Command Line: 🤍 30 Days of Code: 🤍 Intermediate Web Dev Tutorials: 🤍 GitHub | 🤍

NULL & NullPointerException | Java Tutorial | By Mr.Hari Krishna

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Free Demo On Core Java Online Training By Mr. Hari Krishna. Enroll Now : 🤍 Demo on : 5th April 🤍 4:00 PM (IST). Join us on Telegram : 🤍 Java Tutorial: By Mr.Hari Krishna Core Java Course Topic: NULL & NullPointerException #nullpointerexception #javatutorial #corejava #corejavacourse #corejavatraining 💡 Our Website For Classroom Training: 🤍 For Online Training: 🤍 💡 About NareshIT: "Naresh IT is having 16+ years of experience in software training industry and the best Software Training Institute for online training, classroom training, weekend training, corporate training of Hadoop, Salesforce, AWS, DevOps, Spark, Data Science, Python, Tableau, RPA , Java, C#.NET, ASP.NET, Oracle, Testing Tools, Silver light, Linq, SQL Server, Selenium, Android, iPhone, C Language, C, PHP and Digital Marketing in USA, Hyderabad, Chennai and Vijayawada, Bangalore India which provides online training across all the locations 💡 Our Online Training Features: 🎈 Training with Real-Time Experts 🎈 Industry Specific Scenario’s 🎈 Flexible Timings 🎈 Soft Copy of Material 🎈 Share Videos of each and every session. 💡 Please write back to us at 📧 us.training🤍nareshit.com/ 📧 online🤍nareshit.com or Call us at the USA: ☎+1404-232-9879 or India: ☎ +918179191999 💡 Check The Below Links ► For Course Reg: 🤍 ► Subscribe to Our Channel: 🤍 ► Circle us on G+: 🤍 ► Like us on Facebook: 🤍 ► Follow us on Twitter: 🤍 ► Follow us on Linkedin: 🤍 ► Follow us on Instagram: 🤍

Java 8 Streams | Optional Usage and Best Practices | JavaTechie

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This tutorial will guide you java 8 Optional and its usecase with stream API Content : What is Optional ? why Optional ? When to use Optional ? #javatechie #java8 #Stream GitHub: 🤍 Blogs: 🤍 Facebook: 🤍 guys if you like this video please do subscribe now and press the bell icon to not miss any update from Java Techie Disclaimer/Policy: Note : All uploaded content in this channel is mine and its not copied from any community , you are free to use source code from above mentioned GitHub account

Some cool facts about Null in Java || Important to know

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In this video, I have explained some cool facts about null keyword in java. ~~~Subscribe to this channel, and press bell icon to get some interesting videos on Selenium and Automation: 🤍 Follow me on my Facebook Page: 🤍 Let's join our Automation community for some amazing knowledge sharing and group discussion on Telegram: 🤍 WebServices API Automation Tutorials: 🤍 ~~~Subscribe to this channel, and press bell icon to get some interesting videos on Selenium and Automation: 🤍 Follow me on my Facebook Page: 🤍 Let's join our Automation community for some amazing knowledge sharing and group discussion on Telegram: 🤍 Paid courses (Recorded) videos: Java & Selenium Course: 🤍 API Course: 🤍 ➡️Get Our Courses✔️ 📗 Get My Paid Courses at Paid courses (Recorded) videos: Java & Selenium Course: 🤍 API Course: 🤍 - ✔️SOCIAL NETWORKS Facebook: 🤍 Twitter: 🤍 Blog: 🤍 Support My Channel✔️Or Buy Me A Coffee Paypal: 🤍 Google Pay: naveenanimation20🤍gmail.com ✔️Thanks for watching! देखने के लिए धन्यवाद Благодаря за гледането 感谢您观看 Merci d'avoir regardé Grazie per la visione Gracias por ver شكرا للمشاهدة

Java Optional Complete Guide

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21.07.2022

Java’s Optional class was introduced in 2014 to allow developers to represent the empty state. But what exactly does that mean? And why is it important enough to bother using Optional? In this video you’ll learn everything you need to know about Optional: how it works, what problems it helps solve, and when not to use it. ▶️ Video chapters (Optional methods in brackets) Why is Optional confusing? 0:00 (of, empty) What acutally is Optional? 0:23 What we did before Optional existed 1:53 Using Optional to return an empty value 3:48 How to handle a returned Optional 4:51 (ifPresent, ifPresentOrElse, orElse, orElseThrow) When should you NOT use Optional? 8:15 (ofNullable, isPresent, get, isEmpty) 6 more advanced Optional patterns 11:20 (orElseGet, or, filter, map, flatMap, stream) ✅ GITHUB REPOSITORY with code examples from the video to try out yourself 🤍 ☕ JDK 18 OPTIONAL API DOCUMENTATION referred to in this video 🤍 🚀 FREE GRADLE INTRODUCTORY COURSE - Get Going with Gradle - the fastest way to a working knowledge of Gradle 🤍 🦸 GRADLE HERO COURSE TO MASTER JAVA PROJECTS - take back control of your Gradle build 🤍 🌍 Accompanying Optional article on my website 🤍 💌 Sign up to my monthly newsletter 🤍

How to Check if a string is empty or not in Java | Validate Strings in Java with is Empty | ABC

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05.06.2019

In today's Episode, learn How to Check if a string is empty or not in Java & Validate Strings in Java with is Empty. About the trainer: Mr. Manjunath Aradhya, a technocrat by profession, a teacher by choice and an educationist by passion. Under his able leadership, ABC for Technology Training which is a National brand enabling the creation of thousands of careers annually in the IT Sector. He has extensive experience working as a Business associate with Wipro Technologies. He has also served as a corporate trainer to many other leading software firms. He has been providing technical assistance to placement cell of various Engineering colleges. He has also authored numerous hot selling engineering and other textbooks which are published by Pearson Education, an internationally acclaimed publication house headquartered in London. Other renowned international publishers such as Cengage Learning headquartered in Boston, United States, have published books authored by him. C Programming and Data Structures book published by Cengage India Private Limited authored by a profound scholar Mr. Manjunath Aradhya is the prescribed book in Dr. Hari Singh Gour University which is the Central University and the oldest university in the state of Madhya Pradesh (MP), India To learn more about Technology, subscribe to our YouTube channel: 🤍 #ValidateStringsinJava #Stringinjava #Javatutorials #Tutorialsforfreshers #howtocrackinterview #Javainterviewquestions #ABC #ManjunathAradhya How to print duplicate characters present in a String using Maps in java 🤍 Introduction to Strings in Java 🤍 Computing length of String in C 🤍 Computing length of String in Java 🤍 Copying one String into another in Java 🤍 Reversing a String in Java 🤍 Palindrome Program in Java | Part 1 🤍 Palindrome Program in Java | Part 2 🤍 How to convert lowercase Strings to uppercase in Java | Part 1 🤍 How to Convert a String with spaces from lowercase to uppercase in Java | Part 2 🤍 Convert First Letter of Each Word From Lowercase to Uppercase in Java 🤍 How to count vowels consonants & special symbol in a string 🤍 How to verify if a String contains only integers 🤍 Pangram Program in Java 🤍 Loops in Java | for | while | do-while | for-each loop in java 🤍 Introduction to MAP Data Structure in Java 🤍 Accessing the Data in MAP Data Structure 🤍 Check if a String has ALL UNIQUE CHARACTERS using MAP Data Structure 🤍 How to print the First Non-Repeated character in a String using Maps in Java 🤍 How to print all Non-Repeated Characters in a String 🤍 How to find the maximum occurring character in a String using Maps in java 🤍 For more updates ABC Course, follow us on: Instagram: 🤍 Facebook: 🤍 LinkedIn: 🤍 Twitter: 🤍 Contact us: 7676500600

Form validation in java (Check if input fields are empty)

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00:06:52
14.03.2018

Form validation in java | Check whether text field and password field are empty in java | Form Fields Validation | validate login form in java Channel Subscription : 🤍 Affilate: 🤍 Find all the videos in the playlist:🤍

Topic 1 - Datatype - OCP Java SE 11 Developer Exam Course 1Z0-819

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02:23:25
23.01.2021

Oracle Certified Professional Java SE 11exam Section: Working with Java data types Topic: Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting Please clone the following repository for code: 🤍

3. Null Safety // Java → Kotlin

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00:12:43
07.01.2018

In this video, we look at null safety, nullable types, and smart casts, important features that make Kotlin programs cleaner and less error-prone.

Java Map and HashMap Tutorial (Java Collections) | Key-Value Pair Entry #10.3

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00:05:34
18.09.2018

Access 7000+ courses for 60 days FREE: 🤍 Explore what is Map Interface and its implementation such as HashMap to store Entry in KEY-VALUE Pair objects. Also, in this section explore List, ArrayList, Set, HashSet, and TreeSet. Source code files: 🤍 Next Video : 🤍 Previous Video : 🤍 . . Please donate and support my work (If you think my free tutorials are better than paid ones :) - Patreon: 🤍 - Paypal/Payoneer: sriyank123🤍gmail.com - UPI (only for India): smartherd🤍okaxis :: If you want to develop a website or a mobile app, email me your requirement at sriyank.siddhartha🤍gmail.com :: Free demos provided beforehand :: - Access my premium courses: 🤍 Free Programming courses: - Ruby Programming: 🤍 - Dart Programming: 🤍 - Kotlin Programming: 🤍 - Java Programming: 🤍 - Kotlin Coroutines: 🤍 Free Flutter course: - Flutter App Development: 🤍 Free Android courses: - Android using Kotlin: 🤍 - Android using Java: 🤍 - Android Material Design: 🤍 - Android Jetpack Architecture: 🤍 - Android Multiple Screen Support: 🤍 - Android Retrofit: 🤍 More free programming courses: - 🤍 Check out my website: - 🤍 Let's get in touch! [Sriyank Siddhartha] LinkedIn: 🤍 Facebook: 🤍 Instagram: 🤍 Twitter: 🤍 Github: 🤍 Thank you for your love and support

Validate Strings in Java with isEmpty, trim, and == null

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00:11:11
12.06.2016

A common way to validate string contents in Java using an if test, or operator, isEmpty(), trim() and null Show a JOptionPane.showInputDialog message with predefined dropdown options. Use JOptionPane.showMessageDialog to show a confirmation. Use title, messageType, message. Extract a constant. Use a String array. Source code available on GitHub at: 🤍 Playlist: 🤍

Double checked Locking in Singleton Design pattern | Java Interview Questions | Code Decode

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00:17:53
09.08.2022

In this video of code decode we have explained the double checked locking of singleton design pattern which is very important java interview question and answer What is Singleton ? In which Scenerio it will break ? private static Singleton instance; public static Singleton getInstance1() { if (instance null) { instance = new Singleton(); } return instance; } This was the code we used to implement the singleton class in java. The above code will create multiple instances of Singleton class if called by more than one thread in parallel(known as multithreading) Write an efficient code to implement singleton which prevents Your code from breaking under multi threaded conditions The primary solution to the current problem will be to make getInstance() method synchronized. Though it’s thread-safe and solves the issue of multiple instances, it isn’t very efficient. You need to bear cost of synchronization every time you call this method, while synchronization is only needed on first time, when Singleton instance is created. This brings us to double checked locking pattern, where only a critical section of code is locked. Double checked locking pattern It is called double-checked locking because there are two checks for instance null, one without locking and other with locking (inside synchronized) block if (instance null) { synchronized (Singleton.class) { // Double checked if (instance null) { instance = new Singleton(); } } } return instance; Double checked locking pattern Here the Intention is to reduce cost of synchronization and improve performance, by only locking critical section of code, the code which creates instance of Singleton class. Now only the first time code goes in sync block and for rest all the calls, the code is not synchronised and hence performance increases in this implementation On the surface, this method looks perfect, as you only need to pay price for synchronized block one time, but it has still broken until you make instance variable volatile. The Java volatile keyword is used to mark a Java variable as "being stored in main memory". More precisely that means, that every read of a volatile variable will be read from the computer's main memory, and not from the CPU cache, and that every write to a volatile variable will be written to main memory, and not just to the CPU cache. Most Asked Core Java Interview Questions and Answers : 🤍 Advance Java Interview Questions and Answers : 🤍 Java 8 Interview Questions and Answers : 🤍 Hibernate Interview Questions and Answers : 🤍 Spring Boot Interview Questions and Answers : 🤍 Angular Playlist : 🤍 SQL Playlist : 🤍 GIT : 🤍 Subscriber and Follow Code Decode Subscriber Code Decode : 🤍 LinkedIn : 🤍 Instagram : 🤍 #singletondoublecheckedlocking #codedecode #javainterviewquestion

Java Streams | FlatMap & Optional Example | Tech Primers

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00:11:24
17.07.2017

This video covers the flatMap and Optional functions in Java Streams API GitHub Code: 🤍 Slack Community: 🤍 Twitter: 🤍 Facebook: 🤍 GitHub: 🤍 or 🤍 Video Editing: iMovie Intro Music: A Way for me (🤍hooksounds.com)

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