Gradle Hello World Error - gradle

Question

I tried my first program in Gradle but I got an error. I wrote a hello world script but I am unable to run it.
My gradle details are:
------------------------------------------------------------
Gradle 2.0
------------------------------------------------------------
Build time: 2014-07-01 07:45:34 UTC
Build number: none
Revision: b6ead6fa452dfdadec484059191eb641d817226c
Groovy: 2.3.3
Ant: Apache Ant(TM) version 1.9.3 compiled on December 23 2013
JVM: 1.8.0_11 (Oracle Corporation 25.11-b03)
OS: Windows 7 6.1 x86
My build.gradle is:
task hello << {
println 'Hello world!'
}
When I run gradle -q --info hello, I get the following error:
Starting Build
Settings evaluated using empty settings script.
Projects loaded. Root project using build file 'D:\Gradle\build.gradle'.
Included projects: [root project 'Gradle']
Evaluating root project 'Gradle' using build file 'D:\Gradle\build.gradle'.
FAILURE: Build failed with an exception.
* Where:
Build file 'D:\Gradle\build.gradle' line: 1
* What went wrong:
A problem occurred evaluating root project 'Gradle'.
> Could not find property 'hello' on root project 'Gradle'.
* Try:
Run with --stacktrace option to get the stack trace. Run with --debug option to
get more log output.
BUILD FAILED
Total time: 7.048 secs
The stacktrace is as follows:
Exception is:
org.gradle.api.GradleScriptException: A problem occurred evaluating root project
'Gradle'.
at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptR
unnerImpl.run(DefaultScriptRunnerFactory.java:54)
at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl.
apply(DefaultScriptPluginFactory.java:187)
at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildSc
riptProcessor.java:39)
at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildSc
riptProcessor.java:26)
at org.gradle.configuration.project.ConfigureActionsProjectEvaluator.eva
luate(ConfigureActionsProjectEvaluator.java:34)
at org.gradle.configuration.project.LifecycleProjectEvaluator.evaluate(L
ifecycleProjectEvaluator.java:55)
at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProj
ect.java:470)
at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProj
ect.java:79)
at org.gradle.configuration.DefaultBuildConfigurer.configure(DefaultBuil
dConfigurer.java:31)
at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(Default
GradleLauncher.java:128)
at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradle
Launcher.java:105)
at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLaun
cher.java:85)
at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildCon
troller.run(InProcessBuildActionExecuter.java:81)
at org.gradle.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.jav
a:33)
at org.gradle.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.jav
a:24)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProce
ssBuildActionExecuter.java:39)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProce
ssBuildActionExecuter.java:29)
at org.gradle.launcher.cli.RunBuildAction.run(RunBuildAction.java:50)
at org.gradle.internal.Actions$RunnableActionAdapter.execute(Actions.jav
a:171)
at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.
execute(CommandLineActionFactory.java:237)
at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.
execute(CommandLineActionFactory.java:210)
at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRunti
meValidationAction.java:35)
at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRunti
meValidationAction.java:24)
at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(
CommandLineActionFactory.java:206)
at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(
CommandLineActionFactory.java:169)
at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionRep
ortingAction.java:33)
at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionRep
ortingAction.java:22)
at org.gradle.launcher.Main.doAction(Main.java:33)
at org.gradle.launcher.bootstrap.EntryPoint.run(EntryPoint.java:45)
at org.gradle.launcher.bootstrap.ProcessBootstrap.runNoExit(ProcessBoots
trap.java:54)
at org.gradle.launcher.bootstrap.ProcessBootstrap.run(ProcessBootstrap.j
ava:35)
at org.gradle.launcher.GradleMain.main(GradleMain.java:23)
Caused by: groovy.lang.MissingPropertyException: Could not find property 'hello'
on root project 'Gradle'.
at org.gradle.api.internal.AbstractDynamicObject.propertyMissingExceptio
n(AbstractDynamicObject.java:43)
at org.gradle.api.internal.AbstractDynamicObject.getProperty(AbstractDyn
amicObject.java:35)
at org.gradle.api.internal.CompositeDynamicObject.getProperty(CompositeD
ynamicObject.java:94)
at org.gradle.groovy.scripts.BasicScript.propertyMissing(BasicScript.jav
a:66)
at build_4hki6gadurnm5c9ejslud0e844.run(D:\Gradle\build.gradle:1)
at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptR
unnerImpl.run(DefaultScriptRunnerFactory.java:52)
... 31 more
BUILD FAILED
Total time: 26.219 secs
amicObject.java:35)
at org.gradle.api.internal.CompositeDynamicObject.getProperty(CompositeD
ynamicObject.java:94)
at org.gradle.groovy.scripts.BasicScript.propertyMissing(BasicScript.jav
a:66)
at build_4hki6gadurnm5c9ejslud0e844.run(D:\Gradle\build.gradle:1)
at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptR
unnerImpl.run(DefaultScriptRunnerFactory.java:52)
... 31 more

Answer 1

I know it's a little bit late, but for those who face the same problem (as you and me) i'll post my solution.
The problem is in the build.gradle encoding, i'm running windows (default encoding ansi) and my build.gradle was UTF-8, I've changed the build.gradle encoding to match my OS encoding and everything works fine now.

Answer 2

To resolve the issue, try to build your project first by using the command:
gradle build
Once this is done, run the task inside your gradle file by saying:
gradle -q hello
gradle -q --info hello
Hope this helps!

Answer 3

I too got this problem when I wrote my first gradle project. It is because of your file encoding. Do not copy the helloword project. Type these words by your self.
task helloword << {
println 'pringln hello word'
}

Answer 4

All I had to do was update kotlin version in gradle, I changed it from "1.2.40" to "1.3.72"
buildscript {
ext.kotlin_version = '1.3.72'
repositories {
mavenCentral()
}
dependencies {
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
}