How to check if a version is stable using Semver4j?

Use the isStable() method on a Semver object, which returns true if the major version is greater than 0 and there are no pre-release identifiers. For example, new Semver("1.2.3").isStable() returns true.

Semver4j vs Apache Maven's version range parsing?

Semver4j provides stricter SemVer compliance and supports multiple range formats (NPM, CocoaPods, Ivy) out of the box, whereas Maven's version parsing is more limited to Maven-specific syntax and lacks built-in support for tilde or caret ranges.

How to increment a patch version programmatically in Semver4j?

Call the withIncPatch() method on a Semver object to immutably create a new version with the patch incremented. For instance, new Semver("1.2.3").withIncPatch() returns "1.2.4".

Does Semver4j handle build metadata in comparisons?

Yes, but build metadata is ignored in equivalent comparisons using isEquivalentTo(), while exact matches with isEqualTo() consider build metadata. This aligns with the SemVer spec where build metadata does not affect version precedence.

How to create a custom range processor for a proprietary format?

Implement the Processor interface, override the process() method to handle your format, and use CompositeProcessor to combine it with built-in processors. The README provides an example with a CustomProcessor class.

Is Semver4j actively maintained since it's a fork?

Yes, the README states it's an active fork of the original unmaintained library, with CI badges and recent releases (e.g., version 6.0.0), indicating ongoing development and community support.

Semver4j — Java Semantic Version Library

What is Semver4j?

Semver4j is a Java library that implements the Semantic Versioning (SemVer) specification for parsing, comparing, and validating version strings. It solves the problem of inconsistent version handling in Java applications by providing a standardized way to manage version numbers, check ranges, and determine version stability. The library supports multiple range formats used in ecosystems like NPM, CocoaPods, and Ivy.

Target Audience

Java developers building applications or libraries that require precise version management, such as dependency resolvers, build tools, package managers, or any system that needs to compare or validate semantic version strings.

Value Proposition

Developers choose Semver4j for its strict adherence to the SemVer spec, support for multiple range formats out of the box, and extensible architecture for custom processors. Its active maintenance as a fork of the original unmaintained library ensures reliability and ongoing improvements.

Semantic versioning for Java apps.

Use Cases

Best For

Implementing version range checks in Java-based dependency management tools
Parsing and validating semantic version strings in build scripts or CI/CD pipelines
Comparing library versions to enforce compatibility constraints in applications
Creating custom version processors for project-specific range formats
Ensuring version stability checks before deploying production releases
Managing version increments and pre-release identifiers programmatically

Not Ideal For

Projects using non-JVM languages like Python or JavaScript where native SemVer libraries are available
Applications that only need simple string version sorting without full SemVer validation
Teams seeking a version management solution with built-in network dependency resolution or GUI tools
Environments requiring zero-dependency or minimal footprint libraries for basic version checks

Pros & Cons

Pros

Multi-format Range Support

Supports NPM, CocoaPods, and Ivy range formats including tilde (~), caret (^), hyphen, and X-range syntax, enabling cross-ecosystem compatibility checks without custom code.

Flexible Version Creation

Offers multiple instantiation methods like parsing, coercion, and builder patterns (e.g., Semver.of()), simplifying version object creation from various inputs, including malformed strings.

Immutable Version Manipulation

Provides safe methods for incrementing major, minor, patch, and clearing pre-release/build metadata, ensuring thread-safe operations and predictable behavior.

Extensible Processor Architecture

Allows creating custom range processors to support additional formats, as demonstrated with the Processor interface, making it adaptable to project-specific needs.

Cons

Java-Only Limitation

Confined to Java and JVM languages, making it unsuitable for polyglot projects or environments where version handling needs to span multiple programming languages.

Complex Range Syntax Overhead

Supporting multiple external range formats (e.g., Ivy's bracket notation) can introduce a learning curve and potential parsing errors if developers are unfamiliar with all syntaxes.

No Built-in Serialization

Lacks direct support for JSON or other serialization formats, requiring additional boilerplate code for integration with web APIs, configuration files, or persistent storage.

Frequently Asked Questions

What is Semver4j?

Target Audience

Value Proposition

Use Cases

Best For

Implementing version range checks in Java-based dependency management tools
Parsing and validating semantic version strings in build scripts or CI/CD pipelines
Comparing library versions to enforce compatibility constraints in applications
Creating custom version processors for project-specific range formats
Ensuring version stability checks before deploying production releases
Managing version increments and pre-release identifiers programmatically

Not Ideal For

Projects using non-JVM languages like Python or JavaScript where native SemVer libraries are available
Applications that only need simple string version sorting without full SemVer validation
Teams seeking a version management solution with built-in network dependency resolution or GUI tools
Environments requiring zero-dependency or minimal footprint libraries for basic version checks

Pros & Cons

Pros

Multi-format Range Support

Supports NPM, CocoaPods, and Ivy range formats including tilde (~), caret (^), hyphen, and X-range syntax, enabling cross-ecosystem compatibility checks without custom code.

Flexible Version Creation

Offers multiple instantiation methods like parsing, coercion, and builder patterns (e.g., Semver.of()), simplifying version object creation from various inputs, including malformed strings.

Immutable Version Manipulation

Provides safe methods for incrementing major, minor, patch, and clearing pre-release/build metadata, ensuring thread-safe operations and predictable behavior.

Extensible Processor Architecture

Allows creating custom range processors to support additional formats, as demonstrated with the Processor interface, making it adaptable to project-specific needs.

Cons

Java-Only Limitation

Confined to Java and JVM languages, making it unsuitable for polyglot projects or environments where version handling needs to span multiple programming languages.

Complex Range Syntax Overhead

Supporting multiple external range formats (e.g., Ivy's bracket notation) can introduce a learning curve and potential parsing errors if developers are unfamiliar with all syntaxes.

No Built-in Serialization

Lacks direct support for JSON or other serialization formats, requiring additional boilerplate code for integration with web APIs, configuration files, or persistent storage.

Frequently Asked Questions

Semver4j

What is Semver4j?

Overview

Use Cases

Best For

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions

Related Projects

Found a gem we're missing?

Semver4j

What is Semver4j?

Overview

Use Cases

Best For

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions

Related Projects

Found a gem we're missing?