Mac OS X和多个Java版本 [英] Mac OS X and multiple Java versions

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本文介绍了Mac OS X和多个Java版本的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

如何在MacOS上安装额外的Java？我安装了jdk8，工作正常。但现在我需要一个jdk7安装用于开发目的。当尝试通过DMG文件安装旧版本时，我收到警告，已经安装了较新版本的Java并且安装程序退出。

How can I install an additional java on MacOS? I installed jdk8 and that works fine. but now I need a jdk7 installation for development purposes. When trying to install the old version via DMG file, i get a warning, that there is already a newer version of java installed and the installer quits. 

/usr/libexec/java_home -verbose
Matching Java Virtual Machines (1):
    1.8.0_20, x86_64:   "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_20.jdk/Contents/Home

   /Library/Java/JavaVirtualMachines/jdk1.8.0_20.jdk/Contents/Home

除了这个之外如何安装jdk7？

How to install jdk7 in addition to this one?

谢谢

Dakky

Thanks
Dakky

推荐答案

在Mac上管理多个java版本的最简洁方法是使用 Homebrew 。

The cleanest way to manage multiple java versions on Mac is to use Homebrew.

在 Homebrew 中，使用：


  • homebrew-cask 安装java的版本

  • jenv 来管理已安装的java版本

  • homebrew-cask to install the versions of java
  • jenv to manage the installed versions of java

如 http://hanxue-it.blogspot.ch/ 2014/05 / installing-java-8-managing-multiple.html ，这些是要遵循的步骤。

As seen on http://hanxue-it.blogspot.ch/2014/05/installing-java-8-managing-multiple.html , these are the steps to follow.


  1. 安装homebrew

  2. install homebrew jenv

  3. install homebrew-cask

  4. 使用cask安装特定的java版本（参见homebrew-cask版本下面的段落）

  5. 为jenv添加此版本以进行管理

  6. 检查版本是否由jenv正确管理

  7. 为您需要的每个版本的Java重复步骤4到6

  1. install homebrew
  2. install homebrew jenv
  3. install homebrew-cask
  4. install a specific java version using cask (see "homebrew-cask versions" paragraph below)
  5. add this version for jenv to manage it
  6. check the version is correctly managed by jenv
  7. repeat steps 4 to 6 for each version of java you need





homebrew-cask版本



添加 homebrew / cask-versions 点击自制软件：

homebrew-cask versions

Add the homebrew/cask-versions tap to homebrew using:

brew tap homebrew/cask-versions

然后你可以看看所有可用的版本： / p>

Then you can look at all the versions available:

brew search java

然后你可以安装你喜欢的版本：

Then you can install the version(s) you like:

brew cask install java7
brew cask install java6

并像往常一样将它们添加到由jenv管理。

And add them to be managed by jenv as usual.

jenv add <javaVersionPathHere>

我认为这是最干净的&最简单的方法。

I think this is the cleanest & simplest way to go about it.

另一个需要注意的重要事项，如 Mac OS X 10.6.7 Java Path当前JDK令人困惑：

Another important thing to note, as mentioned in Mac OS X 10.6.7 Java Path Current JDK confusing :


对于不同类型的JDK或安装，您将拥有不同的
路径

For different types of JDKs or installations, you will have different paths

您可以使用 / usr / libexec / java_home -V 检查安装版本的路径，请参阅如何检查Mac上是否安装了Java JDK？

You can check the paths of the versions installed using /usr/libexec/java_home -V, see How do I check if the Java JDK is installed on Mac?

在Mac OS X Mavericks上，我发现如下：

On Mac OS X Mavericks, I found as following:

1）内置JRE默认值： / Library / Internet \
Plug-Ins / JavaAppletPlugin.plugin / Contents / Home

1) Built-in JRE default: /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home

2）下载的JDK来自Apple： /System/Library/Java/JavaVirtualMachines/1.6。 0.jdk / Contents / Home /

2) JDKs downloaded from Apple: /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/

3）从Oracle下载的JDK： / Library / Java / JavaVirtualMachines / jdk1.8.0_11.jdk / Contents / Home

3) JDKs downloaded from Oracle: /Library/Java/JavaVirtualMachines/jdk1.8.0_11.jdk/Contents/Home





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