【Gradle】Create the first project

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This section will continue First experience with Gradle After installation, create the first Hello World project. will be drawn from the project's Creation, initialization and execution to introduce. It also explains how to go Package and push to the server.
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1. Premise

You need to install the environment locally firstGradle. If it is not installed, please refer toGradle’s first experience Install.

2. Create the project and initialize it

1) Create project

Create a project folder (empty at this time) anywhereanywhere

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2) Initialize project

Use the following command to initialize the project

gradle init

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Seeing BUILD SUCCESSFUL means success.

3. Introduce the generated file structure

The following project files are automatically generated through the above init

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Several main file contents will be posted below. (※ They are all automatically generated)

1） settings.gradle.kts

plugins {
    
    
    // Apply the foojay-resolver plugin to allow automatic download of JDKs
    id("org.gradle.toolchains.foojay-resolver-convention") version "0.7.0"
}

rootProject.name = "gradle-demo"
include("app")

2） build.gradle.kts

plugins {
    
    
    // Apply the application plugin to add support for building a CLI application in Java.
    application
}

repositories {
    
    
    // Use Maven Central for resolving dependencies.
    mavenCentral()
}

dependencies {
    
    
    // Use JUnit Jupiter for testing.
    testImplementation(libs.junit.jupiter)

    testRuntimeOnly("org.junit.platform:junit-platform-launcher")

    // This dependency is used by the application.
    implementation(libs.guava)
}

// Apply a specific Java toolchain to ease working on different environments.
java {
    
    
    toolchain {
    
    
        languageVersion.set(JavaLanguageVersion.of(21))
    }
}

application {
    
    
    // Define the main class for the application.
    mainClass.set("gradle.demo.App")
}

tasks.named<Test>("test") {
    
    
    // Use JUnit Platform for unit tests.
    useJUnitPlatform()
}

3) App.java

package gradle.demo;

public class App {
    
    
    public String getGreeting() {
    
    
        return "Hello World!";
    }

    public static void main(String[] args) {
    
    
        System.out.println(new App().getGreeting());
    }
}

4) AppTest.java

package gradle.demo;

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;

class AppTest {
    
    
    @Test void appHasAGreeting() {
    
    
        App classUnderTest = new App();
        assertNotNull(classUnderTest.getGreeting(), "app should have a greeting");
    }
}

4. Execution

Use the following command to execute

gradlew run

Modify the question (if there is no question below, skip this modification step)

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, you need to modify the following code (※ For details, see [Gradle] Always download gradle-8.5-bin.zip when running The introduction of the article )

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Continue execution

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Saw the execution result: Hello World!

5. Package creation (optional)

Use the following commands to create tar packages and zip packages

gradlew build

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Seeing BUILD SUCCESSFUL means success.

At this point, tar packages and zip packages will be generated

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6. Push (optional)

If you want to learn more about what your build is doing behind the scenes, the best way is to publish your build. To do this, run the build task again with the --scan flag, using the command below

gradlew build --scan

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Click on the URL in the console (https://gradle.com/s/juuuaabt6y3di)

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※ If it is the first time, you will be asked to enter your mail address and go to mail for verification.

Verification mail is roughly as follows:

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At this point, your first project created using Gradle is complete!