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Sample Project Gradle

Sample Project Gradle is a Java and Gradle starter application that demonstrates web3j interactions with an Ethereum test network. Its example connects to a node, loads a wallet, sends Ether, deploys a Greeter smart contract, reads and updates its greeting, and displays a contract event.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Sample Project Gradle — OpenViST project profile in Developer Tools.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use it when learning how a Java web3j application can combine node access, wallet loading, Ether transfers, and basic contract deployment and interaction.

Who it is for

  • Java developers learning web3j and Ethereum interaction patterns.
  • Developers seeking a small reference for wallet-based Ether transfers and basic smart contract operations.

Documented uses

  • Connect a Java web3j application to an Ethereum node.
  • Load a wallet file and demonstrate an Ether transfer.
  • Deploy a Greeter contract, read and update its stored greeting, and inspect an emitted event.
Before you choose

Requirements & limits

  • Running the demo requires a node endpoint, a wallet file, and test Ether.
  • The README describes Rinkeby; its linked testnet documentation is relevant when checking network context.
  • The README points to Infura or a self-run node as endpoint approaches.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Prepare the web3j Gradle sample for its Ethereum demo

Add the node endpoint, wallet file, and Ether prerequisites to the main Application class before using the demo.

Before you start

  • An Ethereum client or node endpoint.
  • A wallet file, which the README says can be generated with the Epirus CLI.
  • Ether for the demo, obtainable from the Rinkeby Faucet.

Steps

  1. Obtain an Ethereum client or node endpoint.

  2. Generate or obtain a wallet file.

  3. Obtain Ether for the demo.

  4. Add the endpoint, wallet file, and Ether details to the main Application class.

Expected outcome

The README says the required details are in place to proceed with the demo, which demonstrates node connection, wallet loading, Ether transfers, and Greeter contract operations.

Guide limitations

  • This recipe covers configuration only; the README does not provide build or run commands.
  • The README identifies Rinkeby as the test network and points to its faucet; it does not establish that the network or faucet is currently available.
Documentation 1 ↗
COMPARE OPTIONS

Compare options for Wallet connections

These projects document a common task and share a project role. This is a source-based comparison, not an execution benchmark or a guarantee of interchangeability.

ProjectDocumented purposePlatformAccess and requirements
Sample Project GradleConnect a Java web3j application to an Ethereum node.CLI
Eth Nextjs BoilerplateCreate a dApp frontend with wallet connection and an example transaction flow.CLI, Web
Svelte Kit Ethers TemplateConfigure RPC endpoints and network providers for Ethereum calls.Web
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
Active
Sources checked
18 October 2026
Original website title
web3j/sample-project-gradle · Official homepage title · retained in its source language
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