Eclipse - 没有 Java (JRE) / (JDK) ...没有虚拟机

Eclipse - no Java (JRE) / (JDK) ... no virtual machine

提问by Wallter

I am trying to get Eclipse v3.5 (Galileo) to re-run on my computer - I have run it before with no problems, but nowI keep getting this error:

我正在尝试让 Eclipse v3.5 (Galileo) 在我的计算机上重新运行 - 我之前运行过它没有任何问题，但现在我不断收到此错误：

A Java Runtime Environment (JRE) or Java Development kit (JDK) must be available in order to run Eclipse. No Java virtual machine was found after searching the following locations: C:\eclipse\jre\javaw.exe javaw.exe in your current PATH

为了运行 Eclipse，Java 运行时环境 (JRE) 或 Java 开发工具包 (JDK) 必须可用。搜索以下位置后未找到 Java 虚拟机：C:\eclipse\jre\javaw.exe javaw.exe in your current PATH

I've just done a fresh install of both the JDK and the SDK.

我刚刚完成了 JDK 和 SDK 的全新安装。

I have Windows 7 (x64).

我有 Windows 7 (x64)。

What's up with this? How do I fix it?

这是怎么回事？我如何解决它？

I can't run any of the ipconfig / tracert / or ping.

我无法运行任何 ipconfig / tracert / 或 ping。

采纳答案by VonC

Eclipse will by default try to launch with the default "java.exe" (the first one referenced by your PATH)

默认情况下，Eclipse 将尝试使用默认的“ java.exe”（您的 引用的第一个PATH）启动

Three things to remember:

要记住的三件事：

• "Installing" a JRE or a JDKcan be as simple as unzipping or copying it from another computer: there is no special installation steps, and you can have as many different JVM versions (1.4, 5.0, 6.0...) as you want, "installed" (copied) almost anywhere on your disk.
• I would recommend to always run Eclipse with the lastest JREpossible (to benefit from the latest hotspotevolutions). You can:
  • Reference that exact JRE path in your eclipse.ini.
  • Copy any JRE of your in your <eclipse>/jredirectory. In both cases, no PATHto update.
• The JVM you will reference withinyour Eclipse session is notalways the one used for launching Eclipse because:
  • You only need a JRE to launch Eclipse, but once Eclipse launched, you should register a JDK for your projects (especially for Java sources and debugging purposes, also in theory for compilation but Eclipse has its own Java compiler) Note: You could register just a JRE within Eclipse because it is enough to runyour program, but again a JDK will allow for more operations.
  • Even though the default registered Java in Eclipse is the one used to launch the session, you can want to register an older SDK (including a non-Sun one) in order to run/debug your programs with a JRE similar to the one which will actually be used in production.

• “安装” JRE 或 JDK可以像从另一台计算机解压缩或复制一样简单：没有特殊的安装步骤，您可以拥有任意多个不同的 JVM 版本（1.4、5.0、6.0...） ，“安装”（复制）在您磁盘上的几乎任何位置。
• 我建议始终使用最新的 JRE运行 Eclipse （以从最新的热点演变中受益）。你可以：
  • 在eclipse.ini 中引用该确切的 JRE 路径。
  • 将您的任何 JRE 复制到 <eclipse>/jre目录中。在这两种情况下，没有PATH更新。
• 您将在Eclipse 会话中引用的 JVM并不总是用于启动 Eclipse 的，因为：
  • 您只需要一个 JRE 来启动 Eclipse，但是一旦 Eclipse 启动，您应该为您的项目注册一个 JDK（特别是用于 Java 源代码和调试目的，理论上也用于编译，但 Eclipse 有自己的 Java 编译器） 注意：您可以只注册Eclipse 中的 JRE，因为它足以运行您的程序，但 JDK 将允许更多操作。
  • 尽管 Eclipse 中默认注册的 Java 是用于启动会话的 Java，但您可能希望注册一个较旧的 SDK（包括非 Sun 的 SDK），以便使用类似于 JRE 的 JRE 来运行/调试您的程序实际用于生产。

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June 2012, jmbertuccicomments:

2012 年 6 月，jmbertucci评论：

I'm running Windows 7 64-bit and I had the 32-bit JRE installed. I downloaded Eclipse 64-bit which looks for a 64-bit JRE. Because I didn't have the 64-bit JRE it threw the error, which makes sense.

I went to the Java manual install page (which was not as directly accessible as you'd like) and installed the 64-bit version. See "Java Downloads for All Operating Systems". That was all I needed.

我运行的是 64 位 Windows 7，并且安装了 32 位 JRE。我下载了寻找 64 位 JRE 的 Eclipse 64 位。因为我没有 64 位 JRE，所以它抛出了错误，这是有道理的。

我转到 Java 手册安装页面（它不像您希望的那样直接访问）并安装了 64 位版本。请参阅“适用于所有操作系统的 Java 下载”。这就是我所需要的。

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April 2016: Steve Mayneadds in the comments:

2016 年 4 月：Steve Mayne在评论中补充说：

I had to edit the eclipse.inifile to reference the correct Java path - Eclipse doesn't use the environment PATHat all when there is a value in eclipse.ini.

我必须编辑eclipse.ini文件以引用正确的 Java 路径 -PATH当eclipse.ini.

回答by Topher Fangio

Try setting your JAVA_HOME to the correct folder. Google for setting environment variables in Windows.

尝试将您的 JAVA_HOME 设置为正确的文件夹。谷歌用于在 Windows 中设置环境变量。

回答by Drew Wills

Check Window > Preferences > Java > Installed JREs. Make sure there's something there; if there isn't, add one.

检查窗口 > 首选项 > Java > 已安装的 JRE。确保那里有东西；如果没有，加一个。

Did you recently update your JDK?

您最近是否更新了 JDK？

回答by Thorbj?rn Ravn Andersen

The JDK does not install a JVM in the default path.

JDK 不会在默认路径中安装 JVM。

Unless you need external tools to run like ant, the non-JDK is enough for Eclipse to run. The easiest way to install such a JVM is to go to http://java.comand let it install whatever it want to install.

除非你需要外部工具像 ant 一样运行，否则非 JDK 足以让 Eclipse 运行。安装此类 JVM 的最简单方法是访问http://java.com并让它安装它想要安装的任何内容。

Then double-click the Eclipse binary again.

然后再次双击 Eclipse 二进制文件。

回答by Rob Oxspring

Open up Windows' System Properties from the control panel and hunt down the environment variables section:

从控制面板打开 Windows 的系统属性并查找环境变量部分：

• Add a JAVA_HOME entry pointing to the directory where the JDK is installed (e.g. C:\Program Files\Java\jre6)
• Find the Path entry and add the following onto the end ;%JAVA_HOME%\bin
• OK the changes
• Restart eclipse so that it is aware of the new environment

• 添加指向 JDK 安装目录的 JAVA_HOME 条目（例如 C:\Program Files\Java\jre6）
• 找到 Path 条目并将以下内容添加到末尾 ;%JAVA_HOME%\bin
• 确定更改
• 重新启动 eclipse 以便它知道新环境

Most Java tools will now be able to find your Java installation either by using the JAVA_HOME environment variable or by looking for java.exe / javaw.exe in the Path environment variable.

大多数 Java 工具现在可以通过使用 JAVA_HOME 环境变量或通过在 Path 环境变量中查找 java.exe / javaw.exe 来找到您的 Java 安装。

回答by scienty

set JAVA_HOME variable and ad JAVA_HOME/bin to evnrionment path variable.

将 JAVA_HOME 变量和广告 JAVA_HOME/bin 设置为 evnrionment 路径变量。

回答by BalusC

All the other answers about setting onlythe JAVA_HOMEare not entirely right. Eclipse does namely notconsult the JAVA_HOME. Look closer at the error message:

所有关于设置其他的答案只有在JAVA_HOME不完全正确。Eclipse 即不参考JAVA_HOME. 仔细查看错误消息：

...in your current PATH

...在您当前的路径中

It literally said PATH, not JAVA_HOME.

它从字面上说PATH，不是JAVA_HOME。

Rightclick My Computerand choose Properties(or press Winkey+Pause), go to the tab Advanced, click the button Environment Variables, in the System Variableslist at the bottom select Path(no, notClasspath), click Editand add ;c:\path\to\jdk\binto the end of the value.

右击我的电脑，选择属性（或按Winkey+ Pause），转到标签高级，点击按钮环境变量，在系统变量列表底部的选择Path（没有，没有Classpath），点击编辑，并添加;c:\path\to\jdk\bin到值的末尾。

Alternatively and if not present, you can also add JAVA_HOMEenvironment variable and make use of it in the PATH. In the same dialogue click Newand add JAVA_HOMEwith the value of c:\path\to\jdk. Then you can add ;%JAVA_HOME%\binto end of the value of the Pathsetting.

或者，如果不存在，您还可以添加JAVA_HOME环境变量并在PATH. 在同一个对话框中单击New并添加JAVA_HOME值为c:\path\to\jdk。然后您可以添加;%JAVA_HOME%\bin到Path设置值的末尾。

回答by laura

I had a co-worker with this exact problem last week. He fixed it by installing the x64 version of Eclipse and the x64 JDK.

上周我有一个同事解决了这个问题。他通过安装 x64 版本的 Eclipse 和 x64 JDK 来修复它。

Edit: he reused his old workspace after installing the necessary plugins, so that should not be much of an issue

编辑：他在安装必要的插件后重用了他的旧工作区，所以这应该不是什么大问题

回答by Wallter

It turned out that all I needed to do was change the 'path'to:

事实证明，我需要做的就是将“路径”更改为：

"C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem; C:\Program Files (x86)\Java; C:\Program Files (x86)\Java\jdk1.6.0_14\bin"

"C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Program Files (x86)\Java;C:\Program Files (x86)\Java\jdk1.6.0_14\bin ”

that did it :)

做到了:)

回答by Tim

I had the same issue (Windows 7 x64, 64bit JDK, 32bit Eclipse), and I found 2 solutions:

我遇到了同样的问题（Windows 7 x64、64 位 JDK、32 位 Eclipse），我找到了 2 个解决方案：

• Install the 64 bit version of Eclipse (found by clicking the "Development Builds" tab on the downloads page.)
• Install the 32bit version of the JDK.

• 安装 64 位版本的 Eclipse（通过单击下载页面上的“Development Builds”选项卡找到。）
• 安装 32 位版本的 JDK。