找不到Java命令 [英] Java command not found

问题描述

我正在尝试让java命令在我的计算机上运行。每当我尝试使用它时，我都会收到错误'java'未被识别为内部或......

I'm trying to get the java command to work on my computer. Whenever I try to use it, I get the error "'java' is not recognized as an internal or..."

我做了什么

到目前为止，我已经通过我的系统环境变量跟踪了这个问题，该变量有一个链接到C：\ProgramData \ Oracle \ Java \ _javapath或javapath的变量PATH简而言之。

What I've done
So far I've traced the issue through my system environment variables, which has a variable PATH that links to "C:\ProgramData\Oracle\Java\javapath" or javapath for short.

javapath文件夹中有3个文件，如果点击它们，弹出窗口会显示：

There are 3 files in the javapath folder, and if you click on them a popup says:

但是当我检查快捷方式的属性并单击打开文件夹位置时，它会将我发送给正确的地方（??这是什么）。

But when I examine the properties of the shortcut and click "open folder location" it sends me to the right place (?? what is this).

以防万一，我试图重新创建快捷方式;我称它为java2，它现在可以正常工作（打开命令框一瞬间关闭），当我点击它时。但是，在命令提示符下使用java2 -version行返回'java2'进行测试不会被识别为内部或外部......

Just in case, I tried to recreate the shortcut; I called it java2 and it now works (opens a command box for a split second and closes) when I click on it. However, testing it in command prompt with the line "java2 -version" returns "'java2' is not recognized as an internal or external..."

详细信息

我刚刚安装了java 8，并且我已经验证它已正确安装

Details
I just installed java 8, and I've verified that it was installed correctly

我正在运行64位Windows 7操作系统

I'm running a 64 bit windows 7 OS

推荐答案

您是否检查过Windows的环境变量？安装JDK / JRE时，该目录应该已添加到PATH变量中。添加的目录需要包含java.exe可执行文件。如果您使用默认设置安装它，它应该位于 C：\Program Files \ Java 之类的东西。一旦找到该目录，就会在其中找到bin目录。

Have you checked your environment variables for Windows? When you installed the JDK/JRE the directory should have been added to the PATH variable. The directory added needs to contain the java.exe executable. It should be located in C:\Program Files\Java or something like that if you installed it using the default settings. Once you find that directory find the bin directory inside it.

为了检查：

• 右键单击我的电脑，然后点击属性


• 在左侧点击高级系统设置


• 点击高级选项卡然后点击环境变量在底部


• 找到PATH变量，然后点击编辑。确认JDK / bin目录的位置在那里，如果不存在则添加它。

• Right click My Computer and hit Properties
• On the left side hit Advanced System Settings
• Hit the Advanced tab and then Environment Variables down at the bottom
• Find the PATH variable and then hit edit. Confirm that the location of the JDK /bin directory is there, if it is not then add it.

此外，如果JAVA_HOME变量尚未设置，这可能是一个好主意。

Also, if the JAVA_HOME variable isn't already set, this may be a good idea.

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