Version Tutorial

This tutorial provides an overview of the Version class, which is part of the lightweight-component/aj-util library. The Version class provides environment detection and configuration utilities.

Introduction

The Version class contains static methods and fields for detecting runtime environment characteristics and configuring default settings.

Main Features

• Operating system detection
• Debug mode detection
• Timezone configuration
• Unit test detection

Fields

1. OS_NAME - Operating system name (lowercase)
2. isDebug - Flag indicating debug/development mode
3. isRunningTest - Cache for unit test detection

Methods

1. isRunningTest()

Detects if the code is running in a JUnit test environment by checking the stack trace for JUnit runners.

• Returns: true if running in a test environment

Static Initialization

The class automatically:

1. Checks and sets default timezone to Asia/Shanghai if not already set
2. Determines debug mode based on OS (non-Linux = debug mode)

Usage Examples

Check Debug Mode

if (Version.isDebug) {
    // Development environment specific code
}

Detect Test Environment

if (Version.isRunningTest()) {
    // Test-specific setup
}

Get OS Info

String os = Version.OS_NAME; // "windows 10", "linux", etc.

Conclusion

The Version class provides simple utilities for detecting runtime environment characteristics and configuring default settings like timezone.