Question

a newb question here: I have a build.gradle file with apply plugin: java in it, and associated with a java project/package. when I run gradle build from the command line I get:

: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: 4.312 secs

but when I check the build folder, there are no classes. What am I doing wrong ?

I have:
lib, reports, test-results & tmp under the folder but no classes. The src code is a class with a main method with ‘Hello world’ printed to console…

My tree looks like this:

.
├── build
│   ├── libs
│   │   └── gradle-sandbox.jar
│   ├── reports
│   │   └── tests
│   │       ├── base-style.css
│   │       ├── css3-pie-1.0beta3.htc
│   │       ├── index.html
│   │       ├── report.js
│   │       └── style.css
│   ├── test-results
│   └── tmp
│       └── jar
│           └── MANIFEST.MF
├── build.gradle
└── src
└── org
    └── gradle
        └── example
            └── simple
                ├── HelloWorld.java
                └── package-info.java

Answer 1

Without more information, it’s hard to say. Maybe you put the source file into the wrong directory (default is src/main/java). Or the internal caches got corrupted (shouldn’t happen, but try to delete the .gradle directory).

Do you get class files when you do gradle clean build? Note that a clean build is required whenever you switch between Gradle versions.