Can't find Main when executing a Java class from Gradle

Question

I've been attempting to run a java main from Gradle however Gradle keeps giving me the error

Execution failed for task ':myTask'

No main class specified

I've attached the code below

sourceSets {
    main {
        java {
            srcDirs 'src/myPackage/downloadupdater'
            srcDirs 'src/myPackage/downloadupdater/util' 
            srcDirs 'src/myPackage/downloadupdater/dao'
        }
        // output.classesDir = "/bin"
    }
}

task myTask(dependsOn : compileJava, type : JavaExec){
    group = "Custom"
    description = "Acquires the weekly stats"

    doLast{
        classpath = sourceSets.main.output.classesDir
        main = "myPackage.SomeClass"
        args "-w"
    }
}

The java class I'm calling is:

package myPackage
public class SomeClass{

    private static DownloadUpdater updater;

    public static void main (String [] args) {

        updater = new DownloadUpdater();

        updater.whichStatistics(args[0]);

        updater.setCalendar();

        updater.secureWorkbook();

        updater.getStatistics();

    }
}

After building, my directories come up with a build-classes-java-main-myPackage but gradle still can't find the main class.

Answer 1

Either move java source files to src/main/java instead of just src. Or set

sourceSet properly
sourceSets.main.java.srcDirs = ['src'] 

and use

task execute(type:JavaExec) {
main = "myPackage.SomeClass"
classpath = sourceSets.main.runtimeClasspath
}

for more refer : Gradle to execute Java class (without modifying build.gradle)