blocks|key|2619379|text|我在这里看到了两个问题，一个是sourceSet问题，另一个是mainClassName问题。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2619380|要么将java源文件移动到src/main/java，而不仅仅是src。或通过向sourceSet添加以下内容来正确设置build.gradle。
sourceSets.main.java.srcDirs+=+'src‘|ordered-list-item|2619381|mainClassName应该是完全限定的类名，而不是路径。
mainClassName+=+"hello.HelloWorld“|2619382|entityMap^0|F|9|V|D|0|D|D|W|3|14|9|0|0|D|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@$9|S|A|T|B|C]|$9|U|A|V|B|C]|$9|W|A|X|B|C]]|D|@]|E|$]]|$1|I|3|J|5|H|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|K|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|L|$]]

I see two problems here, one with <code>sourceSet</code> another with <code>mainClassName</code>.

<ol>
<li>Either move java source files to <code>src/main/java</code> instead of just <code>src</code>. Or set <code>sourceSet</code> properly by adding the following to build.gradle.

<pre><code>sourceSets.main.java.srcDirs = ['src']
</code></pre></li>
<li><code>mainClassName</code> should be fully qualified class name, not path.

<pre><code>mainClassName = "hello.HelloWorld"
</code></pre></li>
</ol>

blocks|key|1012124|text|我只是遇到了这个问题，并决定自己调试，因为我无法在互联网上找到解决方案。我所做的就是将mainClassName更改为它的整个路径(在项目ofc中有正确的子目录)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1012125|++++mainClassName+=+'main.java.hello.HelloWorld'|code-block|syntax|javascript|1012126|我知道这篇文章发布已经将近一年了，但是我想有人会发现这些信息是有用的。|1012127|编码愉快。|1012128|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I just ran into this problem and decided to debug it myself since i couldn't find a solution on the internet. 
All i did is change the mainClassName to it's whole path(with the correct subdirectories in the project ofc)

<pre><code> mainClassName = 'main.java.hello.HelloWorld'
</code></pre>

I know it's been almost one year since the post has been made, but i think someone will find this information useful.

Happy coding.

blocks|key|341718|text|修改build.gradle以将主类放在清单中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|341719|jar+{
++++manifest+{
++++++++attributes+'Implementation-Title':+'Gradle+Quickstart',
+++++++++++++++++++'Implementation-Version':+version,
+++++++++++++++++++'Main-Class':+'hello.helloWorld'
++++}
}|code-block|syntax|javascript|341720|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Modify build.gradle to put your main class in the manifest:

<pre><code>jar {
 manifest {
 attributes 'Implementation-Title': 'Gradle Quickstart',
 'Implementation-Version': version,
 'Main-Class': 'hello.helloWorld'
 }
}
</code></pre>

blocks|key|343155|text|在同一问题上挣扎了一段时间。但是，在创建了目录结构src/main/java并将源代码(从包的顶部)放置之后，它正常工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|343156|我试过的教程。执行gradle+build之后，您必须能够在build目录下找到classes。|offset|length|style|CODE|343157|entityMap|0|LINK|mutability|MUTABLE|url|https://spring.io/guides/gs/gradle/^0|0|9|C|U|5|14|7|4|2|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@$D|R|E|S|F|G]|$D|T|E|U|F|G]|$D|V|E|W|F|G]]|9|@$D|X|E|Y|1|Z]]|A|$]]|$1|H|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

Struggled with the same problem for some time. But after creating the directory structure src/main/java and putting the source(from the top of the package), it worked as expected.

The <a href="https://spring.io/guides/gs/gradle/" rel="nofollow">tutorial</a> I tried with. After you execute <code>gradle build</code>, you will have to be able to find <code>classes</code> under <code>build</code> directory.

blocks|key|341775|text|在我的build.gradle中，我通过创建一个任务，然后按照以下方式指定"mainClassName“来解决这个问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|341776|task(runSimpleXYZProgram,+group:+'algorithms',+description:+'Description+of+what+your+program+does',+dependsOn:+'classes',+type:+JavaExec)+{
++++mainClassName+=+'your.entire.package.classContainingYourMainMethod'
}|code-block|syntax|javascript|341777|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In my build.gradle, I resolved this issue by creating a task and then specifying the "mainClassName" as follows:

<pre><code>task(runSimpleXYZProgram, group: 'algorithms', description: 'Description of what your program does', dependsOn: 'classes', type: JavaExec) {
 mainClassName = 'your.entire.package.classContainingYourMainMethod'
}
</code></pre>

blocks|key|1012243|text|为了让那些试图从Netbeans运行一个gradle项目的新手明白这一点：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1012244|要理解这一点，您需要看到主类名是什么样子的和是什么样子的gradle构建：|offset|length|style|BOLD|1012245|主修班：|1012246|package+com.stormtrident;

public+class+StormTrident+{
++++public+static+void+main(String[]+cmdArgs)+{
++++}
}|code-block|syntax|javascript|1012247|注意，它是包"com.stormtrident“的一部分。|1012248|分级建造：|1012249|apply+plugin:+'java'

defaultTasks+'jar'

jar+{
+from+{
++++++++(configurations.runtime).collect+{
++++++++++++it.isDirectory()+?+it+:+zipTree(it)
++++++++}
++++}++++
++++manifest+{
++++++++attributes+'Main-Class':+'com.stormtrident.StormTrident'
++++}
}


sourceCompatibility+=+'1.8'
[compileJava,+compileTestJava]*.options*.encoding+=+'UTF-8'

if+(!hasProperty('mainClass'))+{
++++ext.mainClass+=+'com.stormtrident.StormTrident'
}

repositories+{
++++mavenCentral()
}

dependencies+{
++++//---apache+storm
++++compile+'org.apache.storm:storm-core:1.0.0'++//compile+
++++testCompile+group:+'junit',+name:+'junit',+version:+'4.10'
}|1012250|entityMap^0|0|L|1|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|10|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|11|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|12|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|13|8|@]|9|@]|A|$]]|$1|S|3|T|5|L|7|14|8|@]|9|@]|A|$M|N]]|$1|U|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|V|$]]

Just to make it clear for newbies trying to run a gradle project from Netbeans: 
To understand this, you need to see what the main class name looks like and what the gradle build looks like: 

Main class: 

<pre><code>package com.stormtrident;

public class StormTrident {
 public static void main(String[] cmdArgs) {
 }
}
</code></pre>

Notice that it is part of the package "com.stormtrident".

Gradle build: 

<pre><code>apply plugin: 'java'

defaultTasks 'jar'

jar {
 from {
 (configurations.runtime).collect {
 it.isDirectory() ? it : zipTree(it)
 }
 } 
 manifest {
 attributes 'Main-Class': 'com.stormtrident.StormTrident'
 }
}


sourceCompatibility = '1.8'
[compileJava, compileTestJava]*.options*.encoding = 'UTF-8'

if (!hasProperty('mainClass')) {
 ext.mainClass = 'com.stormtrident.StormTrident'
}

repositories {
 mavenCentral()
}

dependencies {
 //---apache storm
 compile 'org.apache.storm:storm-core:1.0.0' //compile 
 testCompile group: 'junit', name: 'junit', version: '4.10'
}
</code></pre>

blocks|key|2619556|text|我修复了这个问题，方法是运行一个干净的by+gradle构建(或者手动删除gradle+build文件夹)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2619557|如果将主类移动到新包，而类路径中仍然引用旧的主类，则会发生这种情况。|2619558|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I fixed this by running a clean of by gradle build (or delete the gradle build folder mannually)

This occurs if you move the main class to a new package and the old main class is still referenced in the claspath

blocks|key|341801|text|当我出现此错误时，是因为没有将类包含在包中。将您的HelloWorld.java文件放在"package“文件夹中。您可能必须创建一个新的包文件夹：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|CODE|entityRanges|data|341802|右键单击hello文件夹并选择"New“>+"Package”。然后给它一个名称(例如:+com.example)，并将您的HelloWorld.java类移到包中。|341803|entityMap^0|C|8|P|F|0|4|5|1Q|F|0^^$0|@$1|2|3|4|5|6|7|K|8|@$9|L|A|M|B|C]|$9|N|A|O|B|D]]|E|@]|F|$]]|$1|G|3|H|5|6|7|P|8|@$9|Q|A|R|B|D]|$9|S|A|T|B|D]]|E|@]|F|$]]|$1|I|3|-4|5|6|7|U|8|@]|E|@]|F|$]]]|J|$]]

When I had this error, it was because I didn't have my class in a package. Put your <code>HelloWorld.java</code> file in a "package" folder. You may have to create a new package folder:

Right click on the <code>hello</code> folder and select "New" > "Package". Then give it a name (e.g: com.example) and move your <code>HelloWorld.java</code> class into the package.

blocks|key|341811|text|验证gradle.properties是否正确地定义了一个JAVA_HOVE
org.gradle.java.home=C:\Program文件(x86)\Java\jdk1.8.0_181|type|ordered-list-item|depth|inlineStyleRanges|entityRanges|data|341812|或|unstyled|341813|如果没有定义，请确定Eclipse是否知道JDK而不是JRE|341814|​|341815|📷|atomic|offset|length|341816|341817|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://developer.qcloudimg.com/http-save/yehe-900000/1fc4d0061e42fcf2a3b62ba64a4c54fb.png|imageAlt^0|0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Y|8|@]|9|@]|A|$]]|$1|E|3|F|5|6|7|Z|8|@]|9|@]|A|$]]|$1|G|3|H|5|D|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|K|7|11|8|@]|9|@$L|12|M|13|1|14]]|A|$]]|$1|N|3|H|5|D|7|15|8|@]|9|@]|A|$]]|$1|O|3|-4|5|D|7|16|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V|W|-4]]]]

<ol>
<li>verify if gradle.properties define right one JAVA_HOVE

org.gradle.java.home=C:\Program Files (x86)\Java\jdk1.8.0_181</li>
</ol>

or 

<ol start="2">
<li>if it's not defined be sure if Eclipse know JDK and not JRE</li>
</ol>

<a href="https://i.stack.imgur.com/3qtzy.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3qtzy.png" alt="enter image description here"></a>

blocks|key|2619603|text|我通过将下面的代码添加到我的应用程序来解决这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2619604|//在这里输入代码--这是我在运行build.gradle时遇到的错误。主类名尚未配置，无法解析。|2619605|public+static+void+main(String[]+args)+{
++++SpringApplication.run(Application.class,+args);
}|code-block|syntax|javascript|2619606|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I resolved it by adding below code to my application.

// enter code here
this is error I was getting when I run build.gradle. main class name has not been configured and it could not be resolved

<pre><code>public static void main(String[] args) {
 SpringApplication.run(Application.class, args);
}
</code></pre>

blocks|key|2619655|text|如果您决定用Kotlin编写您的hello.World类，那么另一个问题可能是您必须将它引用为mainClassName+=+"hello.WorldKt"。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2619656|src/main/java/hello/World.kt+d.kt：|2619657|package+hello
fun+main(args:+Array<String>)+{
++++...
}
//+class+World+{}+//+this+line+is+not+necessary|code-block|syntax|javascript|2619658|entityMap^0|G|B|1B|V|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|U|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

If you decided to write your <code>hello.World</code> class in Kotlin, another issue might be that you have to reference it as <code>mainClassName = "hello.WorldKt"</code>.

src/main/java/hello/World.kt:

<pre><code>package hello
fun main(args: Array&lt;String&gt;) {
 ...
}
// class World {} // this line is not necessary
</code></pre>

blocks|key|1012379|text|对于像这样的项目结构|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1012380|project_name/src/main/java/Main_File.class|code-block|syntax|javascript|1012381|在文件build.gradle中，添加以下行|offset|length|style|CODE|1012382|mainClassName+=+'Main_File'|1012383|entityMap^0|0|0|3|C|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

For a project structure like

<pre><code>project_name/src/main/java/Main_File.class
</code></pre>

in the file <code>build.gradle</code>, add the following line

<pre><code>mainClassName = 'Main_File'
</code></pre>

blocks|key|1012429|text|对于Netbeans+11用户来说，这对我来说是可行的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1012430|apply+plugin:+'java'
apply+plugin:+'application'

//+This+comes+out+to+package+%2B+'.'+%2B+mainClassName
mainClassName+=+'com.hello.JavaApplication1'|code-block|syntax|javascript|1012431|这里一般是我的树：|1012432|C:\...\NETBEANSPROJECTS\JAVAAPPLICATION1
│+++build.gradle
├───src
│+++├───main
│+++│+++└───java
│+++│+++++++└───com
│+++│+++++++++++└───hello
│+++│+++++++++++++++++++JavaApplication1.java
│+++│
│+++└───test
│+++++++└───java
└───test|1012433|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

For Netbeans 11 users, this works for me:

<pre><code>apply plugin: 'java'
apply plugin: 'application'

// This comes out to package + '.' + mainClassName
mainClassName = 'com.hello.JavaApplication1'
</code></pre>

Here generally is my tree:

<pre><code>C:\...\NETBEANSPROJECTS\JAVAAPPLICATION1
│ build.gradle
├───src
│ ├───main
│ │ └───java
│ │ └───com
│ │ └───hello
│ │ JavaApplication1.java
│ │
│ └───test
│ └───java
└───test
</code></pre>

blocks|key|343324|text|如果您使用Spring，这可能是问题所在：https://github.com/gradle/gradle/issues/2489。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|343325|基本上，输出目录在Gradle+4.0中改变了，所以如果硬编码它们，执行就会失败。|343326|解决办法是取代：|343327|bootRun+{
+++dependsOn+pathingJar
+++doFirst+{
++++++classpath+=+files("$buildDir/classes/main",+"$buildDir/resources/main",+pathingJar.archivePath)
+++}
}|code-block|syntax|javascript|343328|出自：|343329|bootRun+{
+++dependsOn+pathingJar
+++doFirst+{
++++++classpath+=+files(sourceSets.main.output.files,+pathingJar.archivePath)
+++}
}|343330|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/gradle/gradle/issues/2489^0|L|18|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]]|C|$]]|$1|D|3|E|5|6|7|12|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|13|8|@]|9|@]|C|$]]|$1|H|3|I|5|J|7|14|8|@]|9|@]|C|$K|L]]|$1|M|3|N|5|6|7|15|8|@]|9|@]|C|$]]|$1|O|3|P|5|J|7|16|8|@]|9|@]|C|$K|L]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|C|$]]]|R|$S|$5|T|U|V|C|$W|X]]]]

If you're using Spring Boot, this might be the issue: <a href="https://github.com/gradle/gradle/issues/2489" rel="nofollow noreferrer">https://github.com/gradle/gradle/issues/2489</a>.
Basically, the output directories changed in Gradle 4.0, so if you have them hardcoded the execution will fail.
The solution is to replace:
<pre><code>bootRun {
 dependsOn pathingJar
 doFirst {
 classpath = files(&quot;$buildDir/classes/main&quot;, &quot;$buildDir/resources/main&quot;, pathingJar.archivePath)
 }
}
</code></pre>
by:
<pre><code>bootRun {
 dependsOn pathingJar
 doFirst {
 classpath = files(sourceSets.main.output.files, pathingJar.archivePath)
 }
}
</code></pre>

blocks|key|341902|text|我忘了在主方法public+static+void+main()中添加public+static+void+main()|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|341903|在将其更改为public+static+void+main(String[]+args)之后，一切都正常。|341904|我的build.gradle看起来像这样|341905|apply+plugin:+'java'
apply+plugin:+'application'
mainClassName+=+'hugo.HelloWorld'|code-block|syntax|javascript|341906|​|341907|📷|atomic|341908|341909|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://developer.qcloudimg.com/http-save/yehe-900000/eed963400cbaf43f707f1555cebcfa07.png|imageAlt^0|7|P|Z|P|0|6|12|0|2|C|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@$9|14|A|15|B|C]|$9|16|A|17|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|18|8|@$9|19|A|1A|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1B|8|@$9|1C|A|1D|B|C]]|D|@]|E|$]]|$1|J|3|K|5|L|7|1E|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|6|7|1F|8|@]|D|@]|E|$]]|$1|Q|3|R|5|S|7|1G|8|@]|D|@$9|1H|A|1I|1|1J]]|E|$]]|$1|T|3|P|5|6|7|1K|8|@]|D|@]|E|$]]|$1|U|3|-4|5|6|7|1L|8|@]|D|@]|E|$]]]|V|$W|$5|X|Y|Z|E|$10|11|12|-4]]]]

I had forgotten to add <code>String[] args</code> inside main method <code>public static void main()</code>
After changing it to <code>public static void main(String[] args)</code>, everything worked.
My <code>build.gradle</code> looks like this
<pre><code>apply plugin: 'java'
apply plugin: 'application'
mainClassName = 'hugo.HelloWorld'
</code></pre>
<a href="https://i.stack.imgur.com/eJcV4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/eJcV4.png" alt="FOld stru" /></a>

blocks|key|343367|text|对于Kotlin+DSL+(build.gradle.kts)，请使用以下代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|343368|tasks.jar+{
++++manifest.attributes["Main-Class"]+=+"my.package.name.MyClassName"
++++//+...
}|code-block|syntax|javascript|343369|另一种类似的表示法：|343370|tasks.jar+{
++++manifest+{
++++++++attributes["Main-Class"]+=+"my.package.name.MyClassName"
++++}
++++//+...
}|343371|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.gradle.org/current/userguide/kotlin_dsl.html^0|2|A|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

For <a href="https://docs.gradle.org/current/userguide/kotlin_dsl.html" rel="nofollow noreferrer">Kotlin DSL</a> (build.gradle.kts) use this code:
<pre class="lang-kotlin prettyprint-override"><code>tasks.jar {
 manifest.attributes[&quot;Main-Class&quot;] = &quot;my.package.name.MyClassName&quot;
 // ...
}
</code></pre>
Another similar notation:
<pre class="lang-kotlin prettyprint-override"><code>tasks.jar {
 manifest {
 attributes[&quot;Main-Class&quot;] = &quot;my.package.name.MyClassName&quot;
 }
 // ...
}
</code></pre>

I'm trying to run a very simple project using Gradle and running into the following error when using the <code>gradlew run command</code>:
<blockquote>
could not find or load main class 'hello.HelloWorld'
</blockquote>
Here is my file structure:
<pre><code>SpringTest
 -src
 -hello
 -HelloWorld.java
 -Greeter.java
 -build
 -libs
 -tmp
 -gradle
 -wrapper
 -build.gradle
 -gradlew
 -gradlew.bat
</code></pre>
I excluded the contents of the libs and tmp folders because I didn't think that would be relevant information for this issue, but I can add it in if need be.
Here is my build.gradle file:
<pre><code>apply plugin: 'java'
apply plugin: 'application'
apply plugin: 'eclipse'

mainClassName = 'hello/HelloWorld'

repositories {
 mavenLocal()
 mavenCentral()
}

dependencies {
 compile &quot;joda-time:joda-time:2.2&quot;
}

jar {
 baseName = &quot;gs-gradle&quot;
 version = &quot;0.1.0&quot;
}

task wrapper(type: Wrapper) {
 gradleVersion = '1.11'
}
</code></pre>
Any idea on how to fix this issue? I've tried all sorts of things for the <code>mainClassName</code> attribute but nothing seems to work.

Gradle - Could not find or load main class

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

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我试图使用Gradle运行一个非常简单的项目，并在使用gradlew run command时遇到以下错误无法找到或加载主类“hello.HelloWorld”以下是我的文件结构：SpringTest    -src        -hello            -HelloWorld.java          ...

问Gradle -找不到或加载主类
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