/classpy

GUI tool for investigating Java class files

Primary LanguageJavaMIT LicenseMIT

Classpy

Classpy is a GUI tool for investigating Java class file, Lua binary chunk, Wasm binary code, and other binary file formats.

Inspiration

This tool is mainly inspired by javap and JavaClassViewer. I reinvent the wheel for the following two reasons:

1. Learn Java class file format and bytecode through parsing it
2. Try JavaFX 8

Features

  • Understands class files described by JVMS9
  • Supports Lua 5.3 binary chunk format
  • Supports Wasm binary format
  • Supports Bitcoin raw block and transaction format
  • Displays parsed binary file as tree and hex text
  • The corresponding hex text is highlighted when you select a tree node

Quick Start

Just for macos with brew

  • Install
brew tap guxingke/repo && brew install classpy
  • Try
    • open default gui window
    classpy
    • open gui window with args
    echo "public class HelloWorld { public static void main(String[] args) { System.out.println(\"Hello World\"); } }" > HelloWorld.java
$JAVA_HOME/bin/javac HelloWorld.java

classpy HelloWorld.class

Build

cd path/to/classpy
./gradlew uberjar

Run

cd path/to/classpy
./gradlew run

Screenshots

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