Apache Ant
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This content was generated with the assistance of AI and should be verified against the official documentation before being relied on in production. The reference material consulted while preparing these pages is listed in the section bibliography. |
Apache Ant is an XML-driven build tool and a Java library of tasks. A build file (build.xml) names
targets, each target is a list of tasks such as javac, jar, copy or junitlauncher, and targets declare the targets they
depend on. Ant has no built-in conventions: it does not know where the sources live, what a test is or how a library is
versioned, so every one of those decisions is written into the build file. That is its strength and its cost. A build file is
explicit, runs the same way on any machine with a JDK, and can be read top to bottom; it also grows long, and each project
reinvents its own layout. Ant started inside the Tomcat code base, where it existed to build Tomcat, and became an independent
Apache project afterwards (see the Ant FAQ).
Where Ant fits today
Ant is still a sound choice for a build that is mostly file and process orchestration: legacy projects whose build file already works, builds that must call many external programs in a precise order, and builds that need a very small, dependency-free tool. For a new library or application, Maven and Gradle bring a standard layout, dependency management and a plugin ecosystem that Ant leaves to the build author. Comparing Ant, Maven & Gradle gives the side-by-side verdict and Migrating Between Tools shows how to leave Ant when it stops being the right fit.
Ant itself does not resolve dependencies. Two companions add that, and both have pages in this section:
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Apache Ivy 2.6.0, a dependency manager that runs inside Ant: an
ivy.xmlfile declares the module and its configurations,ivy:resolveandivy:retrievefetch the libraries, andivy:publishdeploys the result. It starts at Ivy Overview. -
The Maven Resolver Ant Tasks 2.0.0, which expose Maven’s own resolver to Ant, so a build can resolve, install and deploy with Maven coordinates and Maven repositories without Ivy. They are covered on Maven Resolver Ant Tasks.
The concepts behind both are on Dependency Management Fundamentals.
Release baseline
The pages in this subsection are written against these releases, checked on 2026-10-16, and every example marked as run was executed on JDK 26:
| Component | Version | Notes |
|---|---|---|
Apache Ant |
1.10.18 (September 2026) |
The 1.10 line runs on Java 8 and later. Ant 1.9 is end of life. |
Apache Ivy |
2.6.0 (July 2026) |
Runs inside Ant 1.10. |
Maven Resolver Ant Tasks |
2.0.0 (August 2026) |
Built on Maven Resolver 2. |
The line-by-line history, the Java version each line needs and the security advisories are on Versions & Release History.
Recommended reading path
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Build Automation Fundamentals for the vocabulary shared by all three tools.
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Installation and Running Ant to get a working command line.
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Build File Structure, Targets & Extension Points and Properties to write a first build file.
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Paths, Filesets & Patterns, then Compiling Java, Packaging Archives and Testing with JUnit & junitlauncher for a complete compile, test and package build.
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Ivy Overview or Maven Resolver Ant Tasks to add libraries.
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The structuring pages (Multi-File Builds: import, include & subant, Macros & Presets, Writing Custom Tasks) when the build outgrows one file.
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Deprecations & Migration before you commit to Ant for a long-lived project.