Java2go

About

Java2go is a transpiler that automatically converts Java source code to compatible Go code

It does this through several steps:

1. Parse the java source code into a tree-sitter AST

2. Convert that AST into Golang's own internal AST representation

3. Use Golang's builtin AST printer to print out the generated code

Issues

Note: Java2go is still in development, and as such, please expect many bugs

Currently, the following features are not implemented

• Enum classes (Fully)
• Generic types
• Any type of inheritance
  • Abstract classes
  • Lambda interfaces
  • Inheritance
• Decorators
• Anything that checks instanceof
• Types for lambda expressions

Usage

• Clone the repo

• go build to build the java2go binary

• ./java2go <files> to parse a list of files or directories

Options

• -w writes the files directly to their corresponding .go files, instead of stdout

• -output specifies an alternate directory for the generated files. Defaults to putting them next to their source files by default

• -q prevents the outputs of the parsed files from appearing on stdout, if not being written

• -ast pretty-prints the generated ast, in addition to any other options

• -symbols (WIP) controls whether the parser uses internal symbol tables to handle things such as name collistions, resulting in better code generation at the cost of increased parser complexity (default: true)

• -sync parses the files in sequential order, instead of in parallel

• -exclude-annotations specifies a list of annotations on methods and fields that will exclude them from the generated code