Development Environment Setup

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2026年1月6日

How to Check Your Java Version (Windows, macOS, Linux): java -version & javac -version

1. What You’ll Learn in This Article (Bottom Line Up Front) On this page, we’ll organize the fastest way to achieve your goal of “checking the Java version from the command line.”To share the conclusi […]

2025年12月28日

Java Null Checks Explained: Best Practices, Optional, and Safe Coding Techniques

Introduction When writing programs in Java, null checking is an unavoidable and critical topic. Especially in enterprise systems and large-scale applications, developers must correctly handle missing […]