Configuration method for blockchain development using IntelliJ IDEA on Linux system

Configuration method for using IntelliJ IDEA for blockchain development on Linux systems

Introduction:
With the widespread application of blockchain technology in finance, supply chain management, medical and other fields, for There is also a growing demand for blockchain development tools. As a powerful integrated development environment, IntelliJ IDEA not only provides a rich set of plug-ins, but also supports the development of various programming languages ​​in a convenient way. This article will introduce how to configure the blockchain development using IntelliJ IDEA on a Linux system, with code examples.

Step 1: Install IntelliJ IDEA
First, we need to download and install IntelliJ IDEA. On Linux systems, you can go to JetBrains' official website (https://www.jetbrains.com/idea/) to download the IntelliJ IDEA version for Linux. After the download is complete, unzip the installation package and move the unzipped folder to the directory where you wish to install it.

Step 2: Install Java JDK
Since IntelliJ IDEA is developed based on Java, you need to ensure that Java JDK is installed on the system before use. You can check whether the Java JDK has been installed by executing the following command:

java -version

If the Java JDK has been installed, the version number of Java will be displayed. If it is not installed, you need to execute the following command in the terminal to install it:

sudo apt update
sudo apt install default-jdk

Step 3: Install and configure Gradle
Gradle is a very popular build tool for managing dependencies and building projects. Before using Gradle, you need to install and configure it. You can execute the following command to install:

sudo apt install gradle

After the installation is complete, use the following command to check whether Gradle is installed successfully:

gradle -v

Next, you need to configure Gradle’s environment variables. Open a terminal and enter the following command to edit the configuration file:

sudo nano /etc/profile.d/gradle.sh

Enter the following in the editor:

export PATH=$PATH:/opt/gradle/gradle-<version>/bin

Replace <version></version> with the Gradle you installed version number. Save and exit the editor, then execute the following command to make the configuration take effect:

sudo chmod +x /etc/profile.d/gradle.sh
source /etc/profile.d/gradle.sh

Step 4: Create a blockchain project
In IntelliJ IDEA, creating a new blockchain project is very simple. Open IntelliJ IDEA, select "Create New Project" on the welcome interface or select "File"->"New Project" on the menu bar.

In the "New Project" dialog box, select "Gradle" as the project type and click the "Next" button. Next, select the directory where you wish to create the project and enter a name for the project. Click the "Finish" button to create the project.

Step 5: Configure blockchain dependencies
After opening the project, you need to configure the project's dependencies. Edit the build.gradle file in the project and add the following content:

repositories {
    mavenCentral()
}

dependencies {
    implementation group: 'org.web3j', name: 'core', version: '4.8.3'
    implementation group: 'org.ethereum', name: 'ethereumj-core', version: '1.9.0-RELEASE'
}

In the above code, we added the dependencies of Web3j and Ethereumj. Web3j is a Java library for interacting with the Ethereum blockchain, while Ethereumj is a Java implementation of the Ethereum client.

After saving and closing the build.gradle file, IntelliJ IDEA will automatically download the required dependencies.

Step 6: Write blockchain code
Now, you can start writing blockchain-related code. Create a new Java class in the src/main/java directory and write your blockchain code in this class.

The following is a simple example code:

import org.web3j.crypto.Credentials;
import org.web3j.crypto.ECKeyPair;
import org.web3j.protocol.Web3j;
import org.web3j.protocol.http.HttpService;
import org.web3j.protocol.core.methods.response.EthBlockNumber;

public class BlockchainExample {
    public static void main(String[] args) {
        // 连接到以太坊节点
        Web3j web3j = Web3j.build(new HttpService("https://ropsten.infura.io/v3/your-infura-project-id"));

        // 创建一个新的密钥对和凭证
        ECKeyPair keyPair = ECKeyPair.create("your-private-key");
        Credentials credentials = Credentials.create(keyPair);

        // 获取最新的区块号
        EthBlockNumber blockNumber;
        try {
            blockNumber = web3j.ethBlockNumber().send();
            System.out.println("Latest block number: " + blockNumber.getBlockNumber());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

In the above example, we used the Web3j library to connect to the Ethereum node and create a new key pair and credentials. We then get the latest block number and print it to the console.

Step 7: Run the blockchain project
The last step is to run the blockchain project. In IntelliJ IDEA, click the "Run"-> "Run" button in the menu bar, or use the shortcut key Shift F10 to run your blockchain project.

After running successfully, you will see the results of interacting with the blockchain in the console window.

Summary:
This article introduces the configuration method of using IntelliJ IDEA for blockchain development on a Linux system, and attaches specific code examples. By following the above steps to configure, you can quickly set up a blockchain development environment and conduct further development and research.

I hope this article will be helpful to you, and I wish you smooth blockchain development!

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