gradle:无法执行run因为未定义属性"mainClass"或为空

Question

该项目从CLI构建并运行:

thufir@mordor:~/NetBeansProjects/hello_client$ 
thufir@mordor:~/NetBeansProjects/hello_client$ gradle clean build;java -jar build/libs/hello_client.jar 
:clean
:compileJava
:processResources UP-TO-DATE
:classes
:jar
:assemble
:compileTestJava UP-TO-DATE
:processTestResources UP-TO-DATE
:testClasses UP-TO-DATE
:test UP-TO-DATE
:check UP-TO-DATE
:build

BUILD SUCCESSFUL

Total time: 1.032 secs
hello world
thufir@mordor:~/NetBeansProjects/hello_client$ 

但Netbeans抱怨说:

Executing: gradle run
Arguments: [-c, /home/thufir/NetBeansProjects/hello_client/settings.gradle]

:run
Cannot execute run because the property "mainClass" is not defined or empty.

BUILD SUCCESSFUL

Total time: 0.17 secs

为Netbeans插件设置主类的正确方法是什么？

Answer 1

在您的build.gradle文件中,您可以先应用application插件,

apply plugin: 'application'

然后指定要运行的主类:

mainClassName = 'net.bounceme.mordor.Main'

我真的不知道这里的Netbeans特定的东西,但application插件将为run任务提供必要的配置,从命令行运行,希望也从Netbeans运行.

请参阅Gralde用户指南中的此部分:https://docs.gradle.org/current/userguide/application_plugin.html