[Java] Build Project with Gradle

Download: gradle-4.9-bin.zip gradle-4.9-all.zip

1. Create Project

- Make an empty project directory
- Create project skeleton with 'gradle init' command in the project directory.

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$ gradle init --type <name> <name> - java-application - java-library - scala-library - groovy-library - basic

2. Add local jar files for offline build

- Add jar files to the dependencies category in the root build.gradle file.

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plugins { id 'java' id 'application' } mainClassName = 'com.app.App1' dependencies { compile files('libs/commons-io-2.5.jar') compile files('libs/logback-classic-1.2.3.jar') compile files('libs/logback-core-1.2.3.jar') compile files('libs/slf4j-api-1.7.25.jar') } repositories { jcenter() }

3. Make multiple start script

- Add below command in the root build.gradle file

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applicationName = 'App1' applicationDefaultJvmArgs = ["-Xms512m", "-Xmx1024m"] task createApp2Script(type: CreateStartScripts) { mainClassName = "com.app.App2" classpath = startScripts.classpath outputDir = startScripts.outputDir applicationName = 'App2' defaultJvmOpts = ["-Xms1024m", "-Xmx2048m"] } applicationDistribution.into("bin") { duplicatesStrategy= DuplicatesStrategy.EXCLUDE from(createApp2Script) fileMode = 0755 } distZip { archiveName 'AppRelease.zip' }

4. Make single combined jar files 

- Add below command in the root build.gradle file

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task makeApp1Jar(type: Jar) { manifest { attributes 'Implementation-Title': 'AppRelease', 'Implementation-Version': '1.0.0', 'Main-Class': 'com.app.App1' } baseName = project.name + '_App1' from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } } with jar } task makeApp2Jar(type: Jar) { manifest { attributes 'Implementation-Title': 'AppRelease', 'Implementation-Version': '1.0.0', 'Main-Class': 'com.app.App2' } baseName = project.name + '_App2' from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } } with jar } applicationDistribution.into("bin") { duplicatesStrategy= DuplicatesStrategy.EXCLUDE from(makeApp1Jar) from(makeApp2Jar) from(createApp2Script) fileMode = 0755 }