How I am learning java

This article will share my experience on how to use my free time to learn the Java programming language.

Here are some learning points:

Table of Contents

• Language Learning
• Personal project
• Ecosystem

Language Learning

First of all, let me explain that Java is not my first programming language, so my learning speed may be different from yours, depending on your experience.

Currently, I am learning Java by participating in the Advent of Code challenge, which helps me become familiar with Java’s general syntax, package import, file reading, exception handling, data types, etc.

This method allows me to gain something almost every day in the learning process. Of course, I will also do some project practice to deepen my understanding. Let's take a look at this part.

Personal project

In terms of a personal project, I am currently creating a simple CLI similar to the Linux command line, which I named junix. Some of the commands I'm reproducing include ls, mv, and ifconfig.

When I have a problem, I ask ChatGPT for help, but I try to avoid asking for solutions directly. I would first verify whether my assumptions are correct and think about how Java is implemented based on my experience in other programming languages ​​(such as JavaScript).

For example, instead of directly asking "I want to write an ifconfig command in Java", I would ask something like: "I would like to know if there is a set of classes in Java that can implement functionality similar to Linux ifconfig ( I don't want to use external packages, just STL)".

Of course, in some cases, ChatGPT will provide the code directly, but I wouldn't just copy and paste it. I would take a closer look at the classes it uses, look up the relevant Oracle documentation, and compare ChatGPT's suggestions with what's in the documentation.

Ecosystem

In terms of the Java ecosystem, I started learning some tools such as Maven or Gradle build systems, and testing libraries such as JUnit.

Summary

Currently, I am still in the process of learning Java. I hope to finish junix (my first personal Java project) by the end of this month. I also plan to complete 2-3 more framework-independent projects to really understand the Java build system and its general flow. I hope to start learning Spring Boot and other frameworks at the end of February.

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