C:\crp\eewe\src\main\java\hello>type HelloWorld.java
    package hello
    
    public class HelloWorld {
    
       public static void main(String[] args) {
             Greeter greeter = new Greeter();
             System.out.println(greeter.sayHello());
       }
    
    }
    C:\crp\eewe\src\main\java\hello>type Greeter.java
    package hello;
    public class Greeter {
      public String sayHello() {
         return "Hello world!";
      }
    }
    
    C:\crp\eewe\src\main\java\hello>




I then run 'gradle' and it says build successful and produces my .gradle subdirectory


    C:\crp\eewe\src\main\java\hello>gradle
    :help
    
    Welcome to Gradle 2.0.
    
    To run a build, run gradle <task> ...
    
    To see a list of available tasks, run gradle tasks
    
    To see a list of command-line options, run gradle --help
    
    BUILD SUCCESSFUL
    
    Total time: 8.89 secs
    C:\crp\eewe\src\main\java\hello>


I then run `gradle build`, which adds to the .gradle subdirectory, and creates and fills a  build subdirectory but doesn't produce build\classes  or build\reports 


    C:\crp\eewe\src\main\java\hello>gradle build
    :compileJava UP-TO-DATE
    :processResources UP-TO-DATE
    :classes UP-TO-DATE
    :jar UP-TO-DATE
    :assemble UP-TO-DATE
    :compileTestJava UP-TO-DATE
    :processTestResources UP-TO-DATE
    :testClasses UP-TO-DATE
    :test UP-TO-DATE
    :check UP-TO-DATE
    :build UP-TO-DATE
    
    BUILD SUCCESSFUL
    
    Total time: 9.565 secs



    C:\crp\eewe\src\main\java\hello>cd build
    
    C:\crp\eewe\src\main\java\hello\build>dir /s/b
    C:\crp\eewe\src\main\java\hello\build\libs
    C:\crp\eewe\src\main\java\hello\build\tmp
    C:\crp\eewe\src\main\java\hello\build\libs\hello.jar
    C:\crp\eewe\src\main\java\hello\build\tmp\jar
    C:\crp\eewe\src\main\java\hello\build\tmp\jar\MANIFEST.MF
    
    C:\crp\eewe\src\main\java\hello\build>

^^ Notice there's a libs directory and a tmp directory but no classes directory there. and no class files.  No reports directory either.