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Lightweight Java and Android library for integration with Ethereum clients
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What is Web3j?

It is a lightweight, highly modular, reactive, type safe Java and Android library for working with Smart Contracts and integrating with clients (nodes) on the Ethereum network. This allows you to work with the Ethereum blockchain, without the additional overhead of having to write your own integration code for the platform.
Web3j is a tool in the Java Tools category of a tech stack.
Web3j is an open source tool with 4.7K GitHub stars and 1.6K GitHub forks. Here’s a link to Web3j's open source repository on GitHub

Who uses Web3j?

10 companies reportedly use Web3j in their tech stacks, including Trialine, dKargo, and Web3 Labs.

27 developers on StackShare have stated that they use Web3j.

Web3j Integrations

Web3j's Features

  • Complete implementation of Ethereum's JSON-RPC client API over HTTP and IPC
  • Ethereum wallet support
  • Auto-generation of Java smart contract wrappers to create, deploy, transact with and call smart contracts from native Java code (Solidity and Truffle definition formats supported)
  • Reactive-functional API for working with filters
  • Ethereum Name Service (ENS) support
  • Support for Parity's Personal, and Geth's Personal client APIs
  • Support for Infura, so you don't have to run an Ethereum client yourself

Web3j Alternatives & Comparisons

What are some alternatives to Web3j?
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Web3j's Followers
37 developers follow Web3j to keep up with related blogs and decisions.