“Could not find or load main class” 在通过 “java -jar” 运行可执行 JAR 文件时出现。

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英文:

"Could not find or load main class" when running executable JAR via "java -jar"

问题

以下是翻译好的内容:

这是我执行 java -version 命令的输出:

openjdk版本 "1.8.0_252"
OpenJDK Runtime Environment (build 1.8.0_252-8u252-b09-1ubuntu1-b09)
OpenJDK 64-Bit Server VM (build 25.252-b09, mixed mode)

当我尝试用 java -jar 执行我的文件时,会显示一个找不到/加载不了主类的消息。我确定这个在 Windows 上是可以工作的,因为我在 Windows 上试过并且成功了。我在 Linux 机器上也试过,也成功了。我不知道我做错了什么,顺便说一下,我是 Linux 的初学者。

我尝试从我的计算机中移除所有的 Java 相关内容,然后重新安装 Java 8 版本,但仍然不起作用。

这是我尝试执行命令的方式。我在 /opt 目录下有一个 Java,用那个 Java 可以让我打开它。

以管理员身份运行时,错误是一样的,只不过是用西班牙语显示的。
“Could not find or load main class” 在通过 “java -jar” 运行可执行 JAR 文件时出现。

MANIFEST 文件

Ant-Version: Apache Ant 1.9.7
Created-By: 1.8.0_231-b11 (Oracle Corporation)
Class-Path: lib/hamcrest-junit-2.0.0.0.jar lib/java-hamcrest-2.0.0.0.j
 ar lib/testFx-3.1.0.jar lib/testfx-core-4.0.13-alpha.jar lib/testfx-j
 unit-4.0.13-alpha.jar lib/javax.ws.rs-api-2.0.jar lib/asm-all-repacka
 ged-2.2.0-b21.jar lib/cglib-2.2.0-b21.jar lib/guava-14.0.1.jar lib/hk
 2-api-2.2.0-b21.jar lib/hk2-locator-2.2.0-b21.jar lib/hk2-utils-2.2.0
 -b21.jar lib/javax.annotation-api-1.2.jar lib/javax.inject-2.2.0-b21.
 jar lib/javax.servlet-api-3.0.1.jar lib/jaxb-api-2.2.7.jar lib/jersey
 -entity-filtering-2.5.1.jar lib/jersey-media-moxy-2.5.1.jar lib/org.o
 sgi.core-4.2.0.jar lib/osgi-resource-locator-1.0.1.jar lib/persistenc
 e-api-1.0.jar lib/validation-api-1.1.0.Final.jar lib/jersey-client.ja
 r lib/jersey-common.jar lib/jersey-container-servlet.jar lib/jersey-c
 ontainer-servlet-core.jar lib/jersey-server.jar lib/eclipselink.jar l
 ib/UtillitiesProject.jar
X-COMMENT: 主类将会被构建自动添加
Main-Class: windowsapplication.WindowsAppicationReto2

有任何想法吗?

英文:

Thats the output when i execute java -version
> openjdk version "1.8.0_252"
OpenJDK Runtime Environment (build 1.8.0_252-8u252-b09-1ubuntu1-b09)
OpenJDK 64-Bit Server VM (build 25.252-b09, mixed mode)

When i tried to execute my file with java -jar shows me a message that can't found/load the main class. I'm sure that this works because i try it in Windows and works done. I tried in a linux machine and works too. I don't know what i am doing bad, I'm beginner with linux by the way.

I tried to remove all the java stuff from my computer and reinstall java 8 version but still not works.

“Could not find or load main class” 在通过 “java -jar” 运行可执行 JAR 文件时出现。

Thats how i tried to execute the command. I have one java in opt and with that one let me open it.

As admin is the same error but in spanish.
“Could not find or load main class” 在通过 “java -jar” 运行可执行 JAR 文件时出现。

MANIFEST

Ant-Version: Apache Ant 1.9.7
Created-By: 1.8.0_231-b11 (Oracle Corporation)
Class-Path: lib/hamcrest-junit-2.0.0.0.jar lib/java-hamcrest-2.0.0.0.j
 ar lib/testFx-3.1.0.jar lib/testfx-core-4.0.13-alpha.jar lib/testfx-j
 unit-4.0.13-alpha.jar lib/javax.ws.rs-api-2.0.jar lib/asm-all-repacka
 ged-2.2.0-b21.jar lib/cglib-2.2.0-b21.jar lib/guava-14.0.1.jar lib/hk
 2-api-2.2.0-b21.jar lib/hk2-locator-2.2.0-b21.jar lib/hk2-utils-2.2.0
 -b21.jar lib/javax.annotation-api-1.2.jar lib/javax.inject-2.2.0-b21.
 jar lib/javax.servlet-api-3.0.1.jar lib/jaxb-api-2.2.7.jar lib/jersey
 -entity-filtering-2.5.1.jar lib/jersey-media-moxy-2.5.1.jar lib/org.o
 sgi.core-4.2.0.jar lib/osgi-resource-locator-1.0.1.jar lib/persistenc
 e-api-1.0.jar lib/validation-api-1.1.0.Final.jar lib/jersey-client.ja
 r lib/jersey-common.jar lib/jersey-container-servlet.jar lib/jersey-c
 ontainer-servlet-core.jar lib/jersey-server.jar lib/eclipselink.jar l
 ib/UtillitiesProject.jar
X-COMMENT: Main-Class will be added automatically by build
Main-Class: windowsapplication.WindowsAppicationReto2

Any idea?

答案1

得分: 1

答案非常简单:您的清单中有一个拼写错误,正如您的屏幕截图和您发布的清单中都清楚地看到的:

请将

Main-Class: windowsapplication.WindowsAppicationReto2

更改为

Main-Class: windowsapplication.WindowsApplicationReto2

应用中的“l”为小写的“L”。

英文:

The answer is very simple: You have a typo in your manifest, as can clearly be seen both in your screenshots and in the manifest you posted itself:

Please change

Main-Class: windowsapplication.WindowsAppicationReto2

to

Main-Class: windowsapplication.WindowsApplicationReto2

App~l~ication with a lower-case "L".

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  • 本文由 发表于 2020年6月5日 22:27:31
  • 转载请务必保留本文链接:https://go.coder-hub.com/62217657.html
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