Kim Young-han's Practical Java - Basics

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Kim Young-han's Practical Java Made Right

Why Use Java, an Object-Oriented Programming Language

Most of the modern software we develop in our practice is large-scale software developed by tens to hundreds of people. When developing such large-scale software, the following aspects are very important.

• Code reusability

• Modularization

• Scalability and Flexibility

• Complexity Management for Abstraction

• maintenance

Java is an object-oriented programming language. Object-oriented programming concepts such as encapsulation, inheritance, polymorphism, and abstraction play a role in solving these problems , which is why Java is widely used in practice.

Therefore, object-oriented programming can be considered the most important core concept in Java.

Problems with the existing grammar-focused learning method

However, it is unfortunate that many people who are learning Java for the first time are only learning simple Java grammar. However, in object-oriented concepts, the key is not grammar, but understanding why and in what situations it should be used .

The problem is that many Java developers only study the grammar without understanding the essence of object-oriented programming (OOP), so they realize this fact too late. I don't think it's the learners' fault. It's because most existing books or lecture methods only teach grammar .

The #1 technology in market share, why people find Spring difficult

However, many developers do not know why object-oriented concepts are necessary and just learn Java syntax. So, naturally, Spring feels difficult, and there are countless cases where they give up halfway.

Therefore, this lecture will look at the essence of object orientation,
By doing so, we aim to provide a solid understanding of the core Java concepts that are essential for practical use .

Kim Young-han's Practical Java Roadmap

This lecture is the second lecture of Kim Young-han's Practical Java Roadmap , and is intended for those who have learned basic Java grammar.

The lecture "Kim Young-han's Practical Java - Basics"

Instead of abstract theories, you'll learn the core of object-orientation through code.

In fact, object-oriented concepts such as encapsulation, inheritance, and polymorphism are not easily understood even when explained in theory. This is because the concepts are often explained abstractly.

So in this lecture, I will explain all the core codes of object-oriented programming step by step, one by one, with example code. At first, you will code without object-oriented concepts, and then gradually introduce object-oriented concepts into the code, so that you can feel the improvement directly through the code.

After learning, you will naturally gain an understanding of object orientation while changing existing codes to object-oriented, good codes together with me. And you will also understand Java grammar to support object orientation in the process.

In this lecture, I will make sure you understand why object-orientation, which is the most important thing in Java, is necessary.

Special features of this course

1) Our goal is none other than practice.

This course will save you time so you can move on to the next step quickly.

2) Follow the code and understand naturally.

3) We show you the problem and solution together.