Maven is a build automation and project management tool for Java and other JVM-based projects. It solves the problem of inconsistent, manually-scripted builds by providing a standardized project structure, a declarative dependency model, and a repeatable lifecycle for compiling, testing, and packaging code.
Key Points: • Before tools like Maven, teams relied on ad-hoc scripts or Ant build files that had to manually manage dependency jars and build steps. • Maven's convention-over-configuration approach means most projects need minimal configuration since standard directory layouts, like src/main/java and src/test/java, are assumed. • Its dependency management automatically resolves and downloads a project's direct and transitive dependencies from repositories. • A standardized lifecycle, compile through deploy, means any developer or CI system builds the project the same predictable way. • Its plugin ecosystem extends the build for tasks like code coverage, static analysis, and packaging container images.
Example: Instead of writing a custom shell script to download the right jar versions and compile source in the right order, a team just declares dependencies in pom.xml and runs mvn package.
Interview Tip: A concise interview answer is:
"Maven is a build automation tool that solves the problem of inconsistent, manually-managed Java builds. It standardizes project structure, automatically resolves dependencies from repositories, and provides a repeatable lifecycle so any developer or CI server builds the project the same way."