Linux下的IntelliJ Idea，主类上没有这样的文件或目录 [英] IntelliJ Idea under Linux, No such file or directory on main class

问题描述

我在linux下运行IntelliJ Idea。我在其中创建了一个项目和一个模块，在该模块中我有一个类（MyClass.class），当我尝试从IDE运行它时，我得到了

I'm running IntelliJ Idea under linux. I have created a project and a module inside it, and in that module I have a class (MyClass.class) and when I'm trying to run it from IDE, I get

错误：MyClass.class（没有这样的文件或目录）

ERROR: MyClass.class (No Such file or directory)

有人可以解释一下为什么IntelliJ Idea无法识别模块中的类？我知道它应该是关于模块设置的问题，但我无法弄明白。我正在使用Ubuntu 11.10

Can somebody explain me why IntelliJ Idea doesn't recognize the classes inside my module? I know it should be a problem regarding module settings but I can't figure it out. I'm using Ubuntu 11.10

好的，我把路径和所有内容放在这里看看：）

OK I place here the paths and everything for all to see :)

类型：echo $ PATH

结果：
/ usr / lib / lightdm / lightdm：/ usr / local / sbin：/ usr / local / bin目录：/ usr / sbin目录：在/ usr / bin中：/ sbin目录：/ bin中：在/ usr /游戏：/ usr / lib中/ JVM / Java的7-的OpenJDK-I386 /斌：/ usr / lib中/ JVM / java-7-openjdk-i386 / bin：/ usr / lib / jvm / java-7-openjdk-i386 / bin

type : echo $PATH
Result: /usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/lib/jvm/java-7-openjdk-i386/bin:/usr/lib/jvm/java-7-openjdk-i386/bin:/usr/lib/jvm/java-7-openjdk-i386/bin

类型： echo $ JAVA_HOME
结果：

/ usr / lib / jvm / java-7-openjdk-i386

type: echo $JAVA_HOME Result:
/usr/lib/jvm/java-7-openjdk-i386

类型： ./idea.sh
结果：
注意：如果您同时安装了Sun JDK和OpenJDK
，请验证IDEA_JDK或JDK_HOME环境变量指向有效的Sun JDK安装

type: ./idea.sh Result: NOTE: If you have both Sun JDK and OpenJDK installed please validate either IDEA_JDK or JDK_HOME environment variable points to valid Sun JDK installation

推荐答案

Arkde，我有可能解释为什么Jaroslav的JDK7解决方案没有不适合你。

Arkde, I have a possible explanation why Jaroslav's solution with JDK7 didn't work for you.

也许你有各种 alt的混合Java版本ernatives 项目，可能与环境变量如 JAVA_HOME 和 JDK_HOME 指向的版本相冲突？

Maybe you had mixed Java versions in various alternatives items, possibly conflicting with the version that environment variables like JAVA_HOME and JDK_HOME point to?

也许某些东西指向 / usr / lib / jvm / default-java 符号链接作为JDK主页，并且该符号链接指向不同版本的JDK？

Maybe something points to the /usr/lib/jvm/default-java symlink as the JDK home, and that symlink points to a different version of JDK than intended?

您是否尝试将所有Java工具的替代版本重置为版本7？像这样：

Did you try resetting alternatives for all Java tools to version 7? Like this:

update-java-alternatives --list
# ...see what JDK's are available, choose the one that corresponds to Java 7
# and set it to be the default in alternatives:
sudo update-java-alternatives --set java-1.7.0-openjdk-amd64
# or interactively:
sudo update-alternatives --config java

以下命令输出的内容是什么你的系统？

What do the following commands output on your system?

echo $JAVA_HOME
echo $JDK_HOME
ls -l /usr/lib/jvm/default-java
update-java-alternatives --list
update-alternatives --list java

我有完全相同的问题。
我在Idea流程上执行了strace，在日志中我看到它试图打开几个没有指定路径的.class文件 - 比如 open（SomeClass.class，O_RDONLY ）= -1 ENOENT（没有这样的文件或目录） - 没有项目输出目录和相应包的路径。

I had exactly the same problem. I've performed strace on the Idea process and in the log I saw it trying to open several .class files without the path to them specified - like open("SomeClass.class", O_RDONLY) = -1 ENOENT (No such file or directory) - no path to the project output directory and to appropriate package.

所以我在JDK 6上安装了JDK 7：

So I've apt-get installed JDK 7 along JDK 6:

apt-get install openjdk-7-doc openjdk-7-jdk openjdk-7-jre openjdk-7-jre-headless openjdk-7-jre-lib openjdk-7-source

在Ubuntu 11.10 Oneiric中，如果你想要OpenJDK 7，OpenJDK 6是不可移动的.JDK 7依赖于JDK 6 ...

In Ubuntu 11.10 Oneiric, OpenJDK 6 isn't removable if you want OpenJDK 7. JDK 7 is dependent on JDK 6...

所以我已经：

1. 更新了上面指定的替代配置，


2. 将 / usr / lib / jvm / default-java 符号链接更改为指向 java-7-openjdk-amd64 ，


3. 仔细检查了所有环境变量（我的 JAVA_HOME 和 JDK_HOME 都指向 / usr / lib / jvm / default-java ），


4. 适当地重新配置项目的SDK（对于项目中的所有模块），

1. updated alternatives configuration as specified above,
2. changed the /usr/lib/jvm/default-java symlink to point to java-7-openjdk-amd64 ,
3. double checked all the environment variables (my JAVA_HOME and JDK_HOME both point to /usr/lib/jvm/default-java),
4. reconfigured my project's SDK appropriately (and for all the modules in the project),

并且瞧 - 问题解决了！

and voila - problem solved!

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