Java SE 21 Developer | Oracle Certified Professional 1Z0-830 (Udemy.com)

Hello there,

Welcome to the "Java SE 21 Developer | Oracle Certified Professional 1Z0-830" course.

Oracle 1Z0-830 | Java SE 21 Developer Certification Exam Prep Course with Lambda Expression & Java Collections Framework

The Oracle Certified Professional: Java SE 21 Developer (Exam 1Z0-830) is a globally recognized certification that validates your expertise in Java programming, object-oriented principles, and modern Java development practices. This certification is highly valued by employers and serves as proof of your proficiency in Java, one of the most in-demand programming languages in the world.

In this course, we aimed to make you a good Java developer and pass the exam required for Oracle Certified Professional: Java SE 21 Developer Certification (Exam number 1Z0-830).

You may have taken many Java courses so far, but the exams you will take to get Java certificates to require you to know many tips and exam tactics, apart from Java knowledge. Therefore, being a perfect Java developer is not enough to get a passing grade on the exam.

So why should you become a Java SE 21 Developer? Because if you want to apply for a Java developer job, having a certificate will put you one step ahead of other candidates. Remember that a certified developer is always preferable to a non-certified developer.

In this course, you'll learn Java from scratch, along with essential exam tactics, tips, and practice questions. You'll also work on 8 real-world projects and complete 50+ coding exercises to reinforce your learning.

By the end of the course, you'll be fully prepared to tackle the Oracle Certified Java SE 21 Developer Exam and advance your career with confidence!

In this course you will learn;

• What is Oracle Certified Professional: Java SE 21 Developer Professional Exam 1Z0-830,

• What Java is and how it works,

• Programming Fundamentals with Java,

• IntelliJ IDEA

• Java Development Kit - JDK,

• Java Runtime Environment – JRE,

• Java Virtual Machine - JVM

• All Concepts of Object-Oriented Programming

• Variables and Data Types,

• Arrays,

• Control Flow Statements,

• Methods,

• Collections,

• Strings,

• Wrapper Classes,

• Exceptions,

• Enum Types and more,

• Lambda Expression,

• Stream API,

• Date and Time,

• Java Input/Output,

• Concurrency

  
  

No Previous Knowledge is needed!

This course will take you from a beginner to a more experienced level.

This Java course starts with absolute beginner core concepts, such as showing you the free tools you need to download and install, and takes you all the way to mastering the skills required for the Oracle Certified Professional: Java SE 21 Developer certification. You will gradually learn core Java skills through hands-on examples, building your knowledge step by step. If you're already in the field and need a refresher, this course will also serve as a valuable guide. Every time you return to this course, you will learn something new or improve your existing skills, getting you one step closer to passing the Java SE 21 certification exam.

What is Java?

Java is a programming language and platform initially developed by Sun Microsystems and now owned by Oracle. Java is inspired by C and C++ and uses an object-oriented programming model, which means that concepts or things are represented as “objects” that have data fields and methods. One of the biggest advantages of Java is that it runs on a Java Virtual Machine (JVM), meaning that you can execute Java code on any platform that has a JVM, without re-compilation. This is different from C and C++, which require re-compilation for every hardware platform you execute the code on. Java has many other advantages, including automatic memory management. This eliminates hard-to-understand pointers used in languages like C, which can help Java developers write better code in a shorter period of time.

What does it mean that Java is an object-oriented programming language?

Java is an object-oriented programming (OOP) language, which means concepts or things are represented as “objects” that have data fields and methods. In object-oriented programming, models called “objects” represent either a programming entity or an abstract concept. These objects are created and assembled independently of one another but can work with each other in logical ways. Objects are manifestations of classes and can inherit code allowing for code re-use, which can drastically reduce code duplication if used correctly. Additionally, encapsulation, another core OOP concept, allows you to create code with the implementation hidden. Although, in many cases, writing OOP code in Java (and other OOP languages) can take longer than using a procedural language, the benefits obtained with OOP, namely code reusability, encapsulation of data, and readability of code, often result in code that is easier to maintain in the long run.

What is Java used for?

Java is a very versatile language. Several fields use Java, including Android app development, desktop applications that work on many operating systems, server-side applications, and more. The virtual machine required to run Java programs has been ported to numerous operating systems allowing Java to run on virtually all hardware. According to the TIOBE index, Java has consistently been in the top 3 most-used and popular languages since its initial release in the 1990s. Many developers still consider Java the language of choice in areas such as enterprise and application servers, and even in embedded systems development. Many Fortune 500 companies rely on Java to run their core systems and employers often view Java experience on a résumé as favorable due to its popularity.

What certification is best for Java?