Java Extractor

The Java Extractor is a static analysis tool that ingests Java source files or JVM bytecode to produce a structured representation of a codebase. It identifies classes, methods, fields, and package boundaries, and resolves dependencies between components. It also constructs call graphs and API usage maps to show how code interacts across modules. The tool outputs machine-readable data and supports export to JSON, CSV, or GraphML to feed analytics workflows, dashboards, and documentation pipelines.

Conceptually, it combines source parsing with bytecode inspection, enabling extraction even when sources are incomplete. It parses ASTs to capture inheritance, generics, annotations, and access modifiers, while decompiling class files when sources are unavailable. Advanced configuration allows filtering by package, ignoring test code, or applying custom extraction rules. Outputs include a hierarchical view of packages, classes, and methods, along with a graph representation suitable for visualization and further processing.

Who benefits: developers planning refactoring, architects designing modules, security and QA teams auditing dependencies, and documentation teams generating architecture diagrams. Unique value comes from dual-source analysis (source + bytecode), stable, schema-rich outputs, and the ability to integrate with CI pipelines. Use cases include understanding legacy dependencies before a migration, producing architecture diagrams from large monoliths, and validating API surface exposure. It emphasizes accuracy, reproducibility, and automation without requiring runtime instrumentation.

Core features include: parsing Java 8+ features; decompilation; dependency extraction; call graphs; output formats; customizable rules. It does not perform runtime profiling, dynamic tracing, or multi-language analysis.