entityMap|blocks|key|78pao|text|另一种选择是使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|30efq|SDKMAN|2895q|啊！请参见|8pvs6|https://wimdeblauwe.wordpress.com/2018/09/26/switching-between-jdk-8-and-11-using-sdkman/|8j8a5|首先安装SDKMAN：|4p0s1|https://sdkman.io/install|hm64|然后..。|6qpc8|使用以下命令安装Oracle+JDK+8：|c8k9k|使用以下命令安装OpenJDK+11：|6ccf1|要进行切换，请执行以下操作：|e6kip|切换到JDK+8|3mq4m|切换到JDK+11|3lqt2|要设置默认值，请执行以下操作：|7umkb|缺省为JDK+8|e7q5e|缺省为JDK+11^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|14|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|15|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|16|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|17|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|18|9|@]|A|@]|B|$]]|$2|K|4|L|6|7|8|19|9|@]|A|@]|B|$]]|$2|M|4|N|6|7|8|1A|9|@]|A|@]|B|$]]|$2|O|4|P|6|7|8|1B|9|@]|A|@]|B|$]]|$2|Q|4|R|6|7|8|1C|9|@]|A|@]|B|$]]|$2|S|4|T|6|7|8|1D|9|@]|A|@]|B|$]]|$2|U|4|V|6|7|8|1E|9|@]|A|@]|B|$]]|$2|W|4|X|6|7|8|1F|9|@]|A|@]|B|$]]|$2|Y|4|Z|6|7|8|1G|9|@]|A|@]|B|$]]|$2|10|4|11|6|7|8|1H|9|@]|A|@]|B|$]]|$2|12|4|13|6|7|8|1I|9|@]|A|@]|B|$]]]]

Another alternative is using <a href="https://sdkman.io/" rel="nofollow noreferrer">SDKMAN</a>! See <a href="https://wimdeblauwe.wordpress.com/2018/09/26/switching-between-jdk-8-and-11-using-sdkman/" rel="nofollow noreferrer">https://wimdeblauwe.wordpress.com/2018/09/26/switching-between-jdk-8-and-11-using-sdkman/</a>

First install SDKMAN: <a href="https://sdkman.io/install" rel="nofollow noreferrer">https://sdkman.io/install</a> and then...

<ol>
<li>Install Oracle JDK 8 with: <code>sdk install java 8.0.181-oracle</code></li>
<li>Install OpenJDK 11 with: <code>sdk install java 11.0.0-open</code></li>
</ol>

To switch:

<ul>
<li>Switch to JDK 8 with <code>sdk use java 8.0.181-oracle</code></li>
<li>Switch to JDK 11 with <code>sdk use java 11.0.0-open</code></li>
</ul>

To set a default:

<ul>
<li>Default to JDK 8 with <code>sdk default java 8.0.181-oracle</code></li>
<li>Default to JDK 11 with <code>sdk default java 11.0.0-open</code></li>
</ul>

entityMap|blocks|key|erd37|text|IMHO，没有必要安装所有额外的应用程序/包。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|bt4ah|使用以下命令检查可用的版本：|50qli|>+/usr/libexec/java_home+-V
Matching+Java+Virtual+Machines+(8):
++++11,+x86_64:+"Java+SE+11-ea"+/Library/Java/JavaVirtualMachines/jdk-11.jdk/Contents/Home
++++10.0.2,+x86_64:+"Java+SE+10.0.2"++++/Library/Java/JavaVirtualMachines/jdk-10.0.2.jdk/Contents/Home
++++9.0.1,+x86_64:++"Java+SE+9.0.1"+/Library/Java/JavaVirtualMachines/jdk-9.0.1.jdk/Contents/Home
++++1.8.0_181-zulu-8.31.0.1,+x86_64:++++"Zulu+8"++++/Library/Java/JavaVirtualMachines/zulu-8.jdk/Contents/Home
++++1.8.0_151,+x86_64:++"Java+SE+8"+/Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home
++++1.7.0_80,+x86_64:+++"Java+SE+7"+/Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Home
++++1.6.0_65-b14-468,+x86_64:+++"Java+SE+6"+/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
++++1.6.0_65-b14-468,+i386:+"Java+SE+6"+/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home|code-block|syntax|javascript|6ri9e|现在，如果您想在上面的列表中选择Azul+JDK+8，而不是Oracle的Java+SE+8，请按如下所示调用命令：|f5ok7|>+/usr/libexec/java_home+-v+1.8.0_181
/Library/Java/JavaVirtualMachines/zulu-8.jdk/Contents/Home|b75sr|要选择Oracle的Java+SE+8，您可以调用以下命令：|8c4un|>+/usr/libexec/java_home+-v+1.8.0_151
/Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home|9b98e|如您所见，提供的版本号应该是唯一的字符串集:+1.8.0|cks6s|_|evah7|181+vs+1.8.0|331gn|78er2|151^0|0|0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|10|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|11|9|@]|A|@]|B|$]]|$2|E|4|F|6|G|8|12|9|@]|A|@]|B|$H|I]]|$2|J|4|K|6|7|8|13|9|@]|A|@]|B|$]]|$2|L|4|M|6|G|8|14|9|@]|A|@]|B|$H|I]]|$2|N|4|O|6|7|8|15|9|@]|A|@]|B|$]]|$2|P|4|Q|6|G|8|16|9|@]|A|@]|B|$H|I]]|$2|R|4|S|6|7|8|17|9|@]|A|@]|B|$]]|$2|T|4|U|6|7|8|18|9|@]|A|@]|B|$]]|$2|V|4|W|6|7|8|19|9|@]|A|@]|B|$]]|$2|X|4|U|6|7|8|1A|9|@]|A|@]|B|$]]|$2|Y|4|Z|6|7|8|1B|9|@]|A|@]|B|$]]]]

IMHO, There is no need to install all the additional applications/packages.

Check available versions using the command:

<pre><code>&gt; /usr/libexec/java_home -V
Matching Java Virtual Machines (8):
 11, x86_64: "Java SE 11-ea" /Library/Java/JavaVirtualMachines/jdk-11.jdk/Contents/Home
 10.0.2, x86_64: "Java SE 10.0.2" /Library/Java/JavaVirtualMachines/jdk-10.0.2.jdk/Contents/Home
 9.0.1, x86_64: "Java SE 9.0.1" /Library/Java/JavaVirtualMachines/jdk-9.0.1.jdk/Contents/Home
 1.8.0_181-zulu-8.31.0.1, x86_64: "Zulu 8" /Library/Java/JavaVirtualMachines/zulu-8.jdk/Contents/Home
 1.8.0_151, x86_64: "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home
 1.7.0_80, x86_64: "Java SE 7" /Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Home
 1.6.0_65-b14-468, x86_64: "Java SE 6" /Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
 1.6.0_65-b14-468, i386: "Java SE 6" /Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home
</code></pre>

Now if you want to pick Azul JDK 8 in the above list, and NOT Oracle's Java SE 8, invoke the command as below:

<pre><code>&gt; /usr/libexec/java_home -v 1.8.0_181
/Library/Java/JavaVirtualMachines/zulu-8.jdk/Contents/Home
</code></pre>

To pick Oracle's Java SE 8 you would invoke the command:

<pre><code>&gt; /usr/libexec/java_home -v 1.8.0_151
/Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home
</code></pre>

As you can see the version number provided shall be the unique set of strings: 1.8.0_181 vs 1.8.0_151

entityMap|blocks|key|9jgl8|text|手动切换系统-没有第三方工具的默认版本：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|b758m|详细信息请参见|1f1fd|这个老答案|aseau|，在macOS上|aclnr|是一个包装器工具，它将使用|dvudv|或者，如果没有设置该变量，将在|ao6f5|并将使用版本最高的版本。它通过查看以下内容来确定版本|80fa6|在每个包下面。|e3r53|有了这些知识，你就可以：|88b0o|通过重命名来控制系统将使用的版本|3h45q|在您不希望用作缺省文件的版本中(该文件不会被实际的Java运行时本身使用)。|3f4ut|控制用于特定任务的版本，方法是设置|3vj0o|我刚刚用OpenJDK+&+Mojave验证了这一点。|1ssdd|在一个全新的系统上，没有安装Java版本：|5mutv|$+java+-version
No+Java+runtime+present,+requesting+install.|code-block|syntax|javascript|7sasu|取消此操作，请在以下位置下载OpenJDK+11和12ea|1kt0u|https://jdk.java.net|2jd6g|；安装OpenJDK11：|8i2pu|$+cd+/Library/Java/JavaVirtualMachines/
$+sudo+tar+xzf+~/Downloads/openjdk-11.0.1_osx-x64_bin.tar.gz|86f5j|系统java现在是11：|7r4ao|$+java+-version
openjdk+version+"11.0.1"+2018-10-16
[...]|7i85j|安装OpenJDK12+(目前可提前访问)：|886gj|$+sudo+tar+xzf+~/Downloads/openjdk-12-ea%2B17_osx-x64_bin.tar.gz|fqqf6|系统java现在是12：|a779l|$+java+-version
openjdk+version+"12-ea"+2019-03-19
[...]|gnm2|现在让我们从system+java+wrapper中“隐藏”OpenJDK+12：|e3l0s|$+cd+jdk-12.jdk/Contents/
$+sudo+mv+Info.plist+Info.plist.disabled|d1d02|系统java又回到了11：|d5vk9|$+java+-version
openjdk+version+"11.0.1"+2018-10-16
[...]|7ugeo|并且您仍然可以通过手动设置来准时使用版本12|5fv96|$+export+JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk-12.jdk/Contents/Home
$+java+-version
openjdk+version+"12-ea"+2019-03-19
[...]^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|23|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|24|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|25|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|26|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|27|9|@]|A|@]|B|$]]|$2|K|4|L|6|7|8|28|9|@]|A|@]|B|$]]|$2|M|4|N|6|7|8|29|9|@]|A|@]|B|$]]|$2|O|4|P|6|7|8|2A|9|@]|A|@]|B|$]]|$2|Q|4|R|6|7|8|2B|9|@]|A|@]|B|$]]|$2|S|4|T|6|7|8|2C|9|@]|A|@]|B|$]]|$2|U|4|V|6|7|8|2D|9|@]|A|@]|B|$]]|$2|W|4|X|6|7|8|2E|9|@]|A|@]|B|$]]|$2|Y|4|Z|6|7|8|2F|9|@]|A|@]|B|$]]|$2|10|4|11|6|7|8|2G|9|@]|A|@]|B|$]]|$2|12|4|13|6|14|8|2H|9|@]|A|@]|B|$15|16]]|$2|17|4|18|6|7|8|2I|9|@]|A|@]|B|$]]|$2|19|4|1A|6|7|8|2J|9|@]|A|@]|B|$]]|$2|1B|4|1C|6|7|8|2K|9|@]|A|@]|B|$]]|$2|1D|4|1E|6|14|8|2L|9|@]|A|@]|B|$15|16]]|$2|1F|4|1G|6|7|8|2M|9|@]|A|@]|B|$]]|$2|1H|4|1I|6|14|8|2N|9|@]|A|@]|B|$15|16]]|$2|1J|4|1K|6|7|8|2O|9|@]|A|@]|B|$]]|$2|1L|4|1M|6|14|8|2P|9|@]|A|@]|B|$15|16]]|$2|1N|4|1O|6|7|8|2Q|9|@]|A|@]|B|$]]|$2|1P|4|1Q|6|14|8|2R|9|@]|A|@]|B|$15|16]]|$2|1R|4|1S|6|7|8|2S|9|@]|A|@]|B|$]]|$2|1T|4|1U|6|14|8|2T|9|@]|A|@]|B|$15|16]]|$2|1V|4|1W|6|7|8|2U|9|@]|A|@]|B|$]]|$2|1X|4|1Y|6|14|8|2V|9|@]|A|@]|B|$15|16]]|$2|1Z|4|20|6|7|8|2W|9|@]|A|@]|B|$]]|$2|21|4|22|6|14|8|2X|9|@]|A|@]|B|$15|16]]]]

Manually switching system-default version without 3rd party tools:

As detailed in <a href="https://stackoverflow.com/a/44169445/6730571">this older answer</a>, on macOS <code>/usr/bin/java</code> is a wrapper tool that will use Java version pointed by <code>JAVA_HOME</code> or if that variable is not set will look for Java installations under <code>/Library/Java/JavaVirtualMachines/</code> and will use the one with highest version. It determines versions by looking at <code>Contents/Info.plist</code> under each package.

Armed with this knowledge you can:

<ul>
<li>control which version the system will use by renaming <code>Info.plist</code> in versions you don't want to use as default (that file is not used by the actual Java runtime itself).</li>
<li>control which version to use for specific tasks by setting <code>$JAVA_HOME</code></li>
</ul>

I've just verified this is still true with OpenJDK &amp; Mojave.

On a brand new system, there is no Java version installed:


<pre class="lang-none prettyprint-override"><code>$ java -version
No Java runtime present, requesting install.
</code></pre>

Cancel this, download OpenJDK 11 &amp; 12ea on <a href="https://jdk.java.net" rel="noreferrer">https://jdk.java.net</a> ;
install OpenJDK11:

<pre class="lang-none prettyprint-override"><code>$ cd /Library/Java/JavaVirtualMachines/
$ sudo tar xzf ~/Downloads/openjdk-11.0.1_osx-x64_bin.tar.gz
</code></pre>

System java is now 11:

<pre class="lang-none prettyprint-override"><code>$ java -version
openjdk version "11.0.1" 2018-10-16
[...]
</code></pre>

Install OpenJDK12 (early access at the moment):

<pre class="lang-none prettyprint-override"><code>$ sudo tar xzf ~/Downloads/openjdk-12-ea+17_osx-x64_bin.tar.gz 
</code></pre>

System java is now 12:

<pre class="lang-none prettyprint-override"><code>$ java -version
openjdk version "12-ea" 2019-03-19
[...]
</code></pre>

Now let's "hide" OpenJDK 12 from system java wrapper:

<pre class="lang-none prettyprint-override"><code>$ cd jdk-12.jdk/Contents/
$ sudo mv Info.plist Info.plist.disabled
</code></pre>

System java is back to 11:

<pre class="lang-none prettyprint-override"><code>$ java -version
openjdk version "11.0.1" 2018-10-16
[...]
</code></pre>

And you can still use version 12 punctually by manually setting <code>JAVA_HOME</code>:

<pre class="lang-none prettyprint-override"><code>$ export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk-12.jdk/Contents/Home
$ java -version
openjdk version "12-ea" 2019-03-19
[...]
</code></pre>

entityMap|blocks|key|19hta|text|我就是这么做的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|ak13s|步骤1：|bscmn|安装Java+11|cl28j|您可以从以下位置下载适用于mac的Java+11+dmg：|ai5f7|https://www.oracle.com/technetwork/java/javase/downloads/jdk11-downloads-5066655.html|56bio|步骤2：|8rul9|安装Java+11之后，确认所有版本的安装。在终端中键入以下命令。|dl5pv|/usr/libexec/java_home+-V|code-block|syntax|javascript|2f8c5|步骤3：|1uq8q|编辑.bash|9rp0l|_|6464e|配置文件|5fm4h|sudo+nano+~/.bash_profile|dhj5t|第四步：|49mq9|添加11.0.1作为默认值。(将下面一行添加到bash|4tqt3|c7fpn|配置文件)。|2gv79|export+JAVA_HOME=$(/usr/libexec/java_home+-v+11.0.1)|2devt|切换到任何版本|e31f8|export+JAVA_HOME=$(/usr/libexec/java_home+-v+X.X.X)|9jrps|现在按CTRL%2BX退出bash。按'Y‘保存更改。|c124v|步骤5：|1m5g0|重新加载bash|5r6uq|5c2bd|e97of|source+~/.bash_profile|60jbh|步骤6：|666up|确认Java的当前版本|4gn0|java+-version^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|1W|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|1X|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|1Y|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|1Z|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|20|9|@]|A|@]|B|$]]|$2|K|4|L|6|7|8|21|9|@]|A|@]|B|$]]|$2|M|4|N|6|7|8|22|9|@]|A|@]|B|$]]|$2|O|4|P|6|Q|8|23|9|@]|A|@]|B|$R|S]]|$2|T|4|U|6|7|8|24|9|@]|A|@]|B|$]]|$2|V|4|W|6|7|8|25|9|@]|A|@]|B|$]]|$2|X|4|Y|6|7|8|26|9|@]|A|@]|B|$]]|$2|Z|4|10|6|7|8|27|9|@]|A|@]|B|$]]|$2|11|4|12|6|Q|8|28|9|@]|A|@]|B|$R|S]]|$2|13|4|14|6|7|8|29|9|@]|A|@]|B|$]]|$2|15|4|16|6|7|8|2A|9|@]|A|@]|B|$]]|$2|17|4|Y|6|7|8|2B|9|@]|A|@]|B|$]]|$2|18|4|19|6|7|8|2C|9|@]|A|@]|B|$]]|$2|1A|4|1B|6|Q|8|2D|9|@]|A|@]|B|$R|S]]|$2|1C|4|1D|6|7|8|2E|9|@]|A|@]|B|$]]|$2|1E|4|1F|6|Q|8|2F|9|@]|A|@]|B|$R|S]]|$2|1G|4|1H|6|7|8|2G|9|@]|A|@]|B|$]]|$2|1I|4|1J|6|7|8|2H|9|@]|A|@]|B|$]]|$2|1K|4|1L|6|7|8|2I|9|@]|A|@]|B|$]]|$2|1M|4|Y|6|7|8|2J|9|@]|A|@]|B|$]]|$2|1N|4|10|6|7|8|2K|9|@]|A|@]|B|$]]|$2|1O|4|1P|6|Q|8|2L|9|@]|A|@]|B|$R|S]]|$2|1Q|4|1R|6|7|8|2M|9|@]|A|@]|B|$]]|$2|1S|4|1T|6|7|8|2N|9|@]|A|@]|B|$]]|$2|1U|4|1V|6|Q|8|2O|9|@]|A|@]|B|$R|S]]]]

This is how I did it.
Step 1: Install Java 11
You can download Java 11 dmg for mac from here: <a href="https://www.oracle.com/java/technologies/javase-jdk11-downloads.html" rel="noreferrer">https://www.oracle.com/technetwork/java/javase/downloads/jdk11-downloads-5066655.html</a>
Step 2: After installation of Java 11. Confirm installation of all versions. Type the following command in your terminal.
<pre><code>/usr/libexec/java_home -V
</code></pre>
Step 3: Edit .bash_profile
<pre><code>sudo nano ~/.bash_profile
</code></pre>
Step 4: Add 11.0.1 as default. (Add below line to bash_profile file).
<pre><code>export JAVA_HOME=$(/usr/libexec/java_home -v 11.0.1)
</code></pre>
to switch to any version
<pre><code>export JAVA_HOME=$(/usr/libexec/java_home -v X.X.X)
</code></pre>
Now Press CTRL+X to exit the bash. Press 'Y' to save changes.
Step 5: Reload bash_profile
<pre><code>source ~/.bash_profile
</code></pre>
Step 6: Confirm current version of Java
<pre><code>java -version
</code></pre>

entityMap|blocks|key|5vkbh|text|使用Homebrew和jenv：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|b8t3v|假设:+Mac机器上已经安装了自制软件。|8pshn|安装cask：|alluk|$+brew+tap+caskroom/cask
$+brew+tap+caskroom/versions|code-block|syntax|javascript|f9jtt|要安装最新的java，请执行以下操作：|drgcu|$+brew+cask+install+java|1ltdj|要安装java+8，请执行以下操作：|697r|$+brew+cask+install+java8|af2op|要安装java+9，请执行以下操作：|ra3|$+brew+cask+install+java9|7uv03|如果你想安装/管理多个版本，你可以使用'jenv'：|5l7ea|安装和配置jenv：|elns3|$+brew+install+jenv
$+echo+'export+PATH="$HOME/.jenv/bin:$PATH"'+>>+~/.bash_profile
$+echo+'eval+"$(jenv+init+-)"'+>>+~/.bash_profile
$+source+~/.bash_profile|cqh6o|将安装的java添加到jenv：|co9m1|$+jenv+add+/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home
$+jenv+add+/Library/Java/JavaVirtualMachines/jdk1.11.0_2.jdk/Contents/Home|2796l|要查看所有已安装的java，请执行以下操作：|fg9ek|$+jenv+versions|28q6l|上面的命令将给出已安装的java的列表：|18nqr|*+system+(set+by+/Users/lyncean/.jenv/version)
1.8
1.8.0.202-ea
oracle64-1.8.0.202-ea|782tu|配置您要使用的java版本：|fmimt|$+jenv+global+oracle64-1.6.0.39^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|1J|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|1K|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|1L|9|@]|A|@]|B|$]]|$2|G|4|H|6|I|8|1M|9|@]|A|@]|B|$J|K]]|$2|L|4|M|6|7|8|1N|9|@]|A|@]|B|$]]|$2|N|4|O|6|I|8|1O|9|@]|A|@]|B|$J|K]]|$2|P|4|Q|6|7|8|1P|9|@]|A|@]|B|$]]|$2|R|4|S|6|I|8|1Q|9|@]|A|@]|B|$J|K]]|$2|T|4|U|6|7|8|1R|9|@]|A|@]|B|$]]|$2|V|4|W|6|I|8|1S|9|@]|A|@]|B|$J|K]]|$2|X|4|Y|6|7|8|1T|9|@]|A|@]|B|$]]|$2|Z|4|10|6|7|8|1U|9|@]|A|@]|B|$]]|$2|11|4|12|6|I|8|1V|9|@]|A|@]|B|$J|K]]|$2|13|4|14|6|7|8|1W|9|@]|A|@]|B|$]]|$2|15|4|16|6|I|8|1X|9|@]|A|@]|B|$J|K]]|$2|17|4|18|6|7|8|1Y|9|@]|A|@]|B|$]]|$2|19|4|1A|6|I|8|1Z|9|@]|A|@]|B|$J|K]]|$2|1B|4|1C|6|7|8|20|9|@]|A|@]|B|$]]|$2|1D|4|1E|6|I|8|21|9|@]|A|@]|B|$J|K]]|$2|1F|4|1G|6|7|8|22|9|@]|A|@]|B|$]]|$2|1H|4|1I|6|I|8|23|9|@]|A|@]|B|$J|K]]]]

With Homebrew and jenv:
Assumption: Mac machine and you already have installed homebrew.
Install Java from official Oracle website. You can install multiple versions of JDK. It will install on the following path:
<pre><code> /Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/
 /Library/Java/JavaVirtualMachines/jdk1.11.0_2.jdk/
 /Library/Java/JavaVirtualMachines/jdk-14.0.2.jdk/
</code></pre>
Without <code>jenv</code>, system will use the java which installed last.
If you want to use/manage multiple version then you can use <code>jenv</code>:
Install and configure jenv:
<pre><code>$ brew install jenv
$ echo 'export PATH=&quot;$HOME/.jenv/bin:$PATH&quot;' &gt;&gt; ~/.zshrc
$ echo 'eval &quot;$(jenv init -)&quot;' &gt;&gt; ~/.zshrc
$ source ~/.zshrc
</code></pre>
Add the installed java to jenv:
<pre><code>$ jenv add /Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home
$ jenv add /Library/Java/JavaVirtualMachines/14.0.2.jdk/Contents/Home
</code></pre>
To see all the installed java:
<pre><code>$ jenv versions
</code></pre>
Above command will give the list of installed java:
<pre><code> system
 1.8
* 1.8.0.291 (set by /Users/lpatel/.jenv/version)
 14
 14.0
 14.0.2
 oracle64-1.8.0.291
 oracle64-14.0.2
</code></pre>
Configure the java version which you want to use:
<pre><code>$ jenv global 1.8.0.291
</code></pre>

entityMap|blocks|key|5pe0n|text|如果您的计算机上安装了多个版本，请在bash配置文件中添加以下内容：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|7kjok|导出JAVA|1tldr|_|3176c|主页|c7u7d|5qqpl|7=$(/usr/libexec/java|f24u6|fhmia|主页-v1.7)|jgif|aabkd|4sia9|cl9uq|dlsbk|8=$(/usr/libexec/java|c0vjb|fl7ho|主页-v1.8)|cc6s9|7vntv|ej66f|3ie6a|4dqjv|9=$(/usr/libexec/java|qttk|5nkn5|主页-v9)|4hrh2|7arq3|并添加以下别名：|cm3jf|alias+java7=‘导出JAVA|972fd|35dd8|HOME=$JAVA|3vk6b|fih6c|bnhlf|dpu6c|7‘|dd4|alias+java8=‘导出JAVA|68gal|ekc5f|e16i3|7pdr4|76jbn|f29fk|8‘|dt5ar|alias+java9=‘导出JAVA|3upp9|24bqh|31l95|d0nvq|f3nn6|a7i1j|9‘|94iog|b4q16|并可使用别名切换到所需版本：|e9t2n|在终端中：^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|26|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|27|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|28|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|29|9|@]|A|@]|B|$]]|$2|I|4|F|6|7|8|2A|9|@]|A|@]|B|$]]|$2|J|4|K|6|7|8|2B|9|@]|A|@]|B|$]]|$2|L|4|F|6|7|8|2C|9|@]|A|@]|B|$]]|$2|M|4|N|6|7|8|2D|9|@]|A|@]|B|$]]|$2|O|4|D|6|7|8|2E|9|@]|A|@]|B|$]]|$2|P|4|F|6|7|8|2F|9|@]|A|@]|B|$]]|$2|Q|4|H|6|7|8|2G|9|@]|A|@]|B|$]]|$2|R|4|F|6|7|8|2H|9|@]|A|@]|B|$]]|$2|S|4|T|6|7|8|2I|9|@]|A|@]|B|$]]|$2|U|4|F|6|7|8|2J|9|@]|A|@]|B|$]]|$2|V|4|W|6|7|8|2K|9|@]|A|@]|B|$]]|$2|X|4|D|6|7|8|2L|9|@]|A|@]|B|$]]|$2|Y|4|F|6|7|8|2M|9|@]|A|@]|B|$]]|$2|Z|4|H|6|7|8|2N|9|@]|A|@]|B|$]]|$2|10|4|F|6|7|8|2O|9|@]|A|@]|B|$]]|$2|11|4|12|6|7|8|2P|9|@]|A|@]|B|$]]|$2|13|4|F|6|7|8|2Q|9|@]|A|@]|B|$]]|$2|14|4|15|6|7|8|2R|9|@]|A|@]|B|$]]|$2|16|4|-4|6|7|8|2S|9|@]|A|@]|B|$]]|$2|17|4|18|6|7|8|2T|9|@]|A|@]|B|$]]|$2|19|4|1A|6|7|8|2U|9|@]|A|@]|B|$]]|$2|1B|4|F|6|7|8|2V|9|@]|A|@]|B|$]]|$2|1C|4|1D|6|7|8|2W|9|@]|A|@]|B|$]]|$2|1E|4|F|6|7|8|2X|9|@]|A|@]|B|$]]|$2|1F|4|H|6|7|8|2Y|9|@]|A|@]|B|$]]|$2|1G|4|F|6|7|8|2Z|9|@]|A|@]|B|$]]|$2|1H|4|1I|6|7|8|30|9|@]|A|@]|B|$]]|$2|1J|4|1K|6|7|8|31|9|@]|A|@]|B|$]]|$2|1L|4|F|6|7|8|32|9|@]|A|@]|B|$]]|$2|1M|4|1D|6|7|8|33|9|@]|A|@]|B|$]]|$2|1N|4|F|6|7|8|34|9|@]|A|@]|B|$]]|$2|1O|4|H|6|7|8|35|9|@]|A|@]|B|$]]|$2|1P|4|F|6|7|8|36|9|@]|A|@]|B|$]]|$2|1Q|4|1R|6|7|8|37|9|@]|A|@]|B|$]]|$2|1S|4|1T|6|7|8|38|9|@]|A|@]|B|$]]|$2|1U|4|F|6|7|8|39|9|@]|A|@]|B|$]]|$2|1V|4|1D|6|7|8|3A|9|@]|A|@]|B|$]]|$2|1W|4|F|6|7|8|3B|9|@]|A|@]|B|$]]|$2|1X|4|H|6|7|8|3C|9|@]|A|@]|B|$]]|$2|1Y|4|F|6|7|8|3D|9|@]|A|@]|B|$]]|$2|1Z|4|20|6|7|8|3E|9|@]|A|@]|B|$]]|$2|21|4|-4|6|7|8|3F|9|@]|A|@]|B|$]]|$2|22|4|23|6|7|8|3G|9|@]|A|@]|B|$]]|$2|24|4|25|6|7|8|3H|9|@]|A|@]|B|$]]]]

If you have multiple versions installed on your machine, add the following in bash profile:

<blockquote>
 export JAVA_HOME_7=$(/usr/libexec/java_home -v1.7)
 
 export JAVA_HOME_8=$(/usr/libexec/java_home -v1.8)
 
 export JAVA_HOME_9=$(/usr/libexec/java_home -v9)
</blockquote>

And add the following aliases:

<blockquote>
 alias java7='export JAVA_HOME=$JAVA_HOME_7'
 
 alias java8='export JAVA_HOME=$JAVA_HOME_8'
 
 alias java9='export JAVA_HOME=$JAVA_HOME_9'
</blockquote>

And can switch to required version by using the alias:

In terminal:

<code>~ &gt;&gt; java7
export JAVA_HOME=$JAVA_7_HOME</code>

entityMap|blocks|key|ae4qu|text|要继续使用特定的主要版本，请使用brew+tap激活AdoptOpenJDK+tap，然后使用brew+cask+install安装所需的版本：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3o3ek|$+brew+tap+AdoptOpenJDK/openjdk
$+brew+cask+install|code-block|syntax|javascript|3591p|要安装带有HotSpot的AdoptOpenJDK+14，请运行：|cvnsi|$+brew+tap+AdoptOpenJDK/openjdk
$+brew+cask+install+adoptopenjdk14^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|L|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|M|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|N|9|@]|A|@]|B|$]]|$2|J|4|K|6|E|8|O|9|@]|A|@]|B|$F|G]]]]

To stay with a specific major release, activate the AdoptOpenJDK tap with brew tap and then install the desired version with brew cask install:
<pre><code>$ brew tap AdoptOpenJDK/openjdk
$ brew cask install &lt;version&gt;
</code></pre>
To install AdoptOpenJDK 14 with HotSpot, run:
<pre><code>$ brew tap AdoptOpenJDK/openjdk
$ brew cask install adoptopenjdk14
</code></pre>

entityMap|blocks|key|1i58t|text|您可以使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|58trh|asdf|2r789|安装并在多个java版本之间切换。它也有其他语言的插件。你可以用Homebrew安装asdf|5p036|brew+install+asdf|code-block|syntax|javascript|f14bn|配置asdf后，安装java插件|6a3io|asdf+plugin-add+java|avmed|选择要安装的版本|e8v|asdf+list-all+java|8vrdf|例如，安装和配置adoptopenjdk8|9ehd8|asdf+install+java+adoptopenjdk-8.0.272%2B10
asdf+global+java+adoptopenjdk-8.0.272%2B10|5jm4d|最后，如果需要，配置JAVA|cq77a|_|fj0m3|回家找回你的贝壳。只需在您的shell初始化脚本中添加，例如在zsh中添加~/.zshc：|385rt|.+~/.asdf/plugins/java/set-java-home.zsh^0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|15|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|16|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|17|9|@]|A|@]|B|$]]|$2|G|4|H|6|I|8|18|9|@]|A|@]|B|$J|K]]|$2|L|4|M|6|7|8|19|9|@]|A|@]|B|$]]|$2|N|4|O|6|I|8|1A|9|@]|A|@]|B|$J|K]]|$2|P|4|Q|6|7|8|1B|9|@]|A|@]|B|$]]|$2|R|4|S|6|I|8|1C|9|@]|A|@]|B|$J|K]]|$2|T|4|U|6|7|8|1D|9|@]|A|@]|B|$]]|$2|V|4|W|6|I|8|1E|9|@]|A|@]|B|$J|K]]|$2|X|4|Y|6|7|8|1F|9|@]|A|@]|B|$]]|$2|Z|4|10|6|7|8|1G|9|@]|A|@]|B|$]]|$2|11|4|12|6|7|8|1H|9|@]|A|@]|B|$]]|$2|13|4|14|6|I|8|1I|9|@]|A|@]|B|$J|K]]]]

You can use <a href="https://asdf-vm.com/#/" rel="nofollow noreferrer">asdf</a> to install and switch between multiple java versions. It has plugins for other languages as well. You can install asdf with Homebrew
<pre><code>brew install asdf
</code></pre>
When asdf is configured, install java plugin
<pre><code>asdf plugin-add java
</code></pre>
Pick a version to install
<pre><code>asdf list-all java
</code></pre>
For example to install and configure adoptopenjdk8
<pre><code>asdf install java adoptopenjdk-8.0.272+10
asdf global java adoptopenjdk-8.0.272+10
</code></pre>
And finally if needed, configure JAVA_HOME for your shell. Just add to your shell init script such as ~/.zshrc in case of zsh:
<pre><code>. ~/.asdf/plugins/java/set-java-home.zsh
</code></pre>

entityMap|blocks|key|ej11c|text|这个答案在Jayson的优秀答案的基础上进行了扩展，并对您的用例的最佳方法提供了一些更固执己见的指导：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2mu9i|SDKMAN是大多数用户的最佳解决方案。它易于使用，没有任何奇怪的配置，并且可以管理多个版本|4sfrl|许多其他Java生态系统|bojk1|项目也很容易。|2dk63|通过Homebrew下载Java版本并通过jenv切换版本是一个很好的选择，但需要做更多的工作。例如，|d7qc6|这个高度支持的答案中的Homebrew命令|86lqu|不再工作了。jenv稍难设置，但|d0js3|插件|a9q4r|没有很好的记录，自述文件说该项目正在寻找新的维护者。jenv仍然是一个伟大的项目，解决了这项工作，社区应该感谢他的出色贡献。SDKMAN是更好的选择，因为它太棒了。|dklob|Jabba是一个多平台解决方案，在Mac、Windows和PC上提供相同的界面(它是用Go编写的，这就是它可以成为多平台的原因)。如果你关心多平台解决方案，这是一个巨大的卖点。如果你只关心在Mac上运行多个版本，那么你不需要多平台解决方案。如果你使用Jabba，你会错过SDKMAN对数十个流行SDK的支持。|16dgi|手动管理版本可能是最糟糕的选择。如果您决定手动切换版本，则可以使用此Bash代码而不是Jayson的详细代码(代码片段来自|5k6hq|homebrew-openjdk自述文件|ctror|jdk()+{
++++++++version=$1
++++++++export+JAVA_HOME=$(/usr/libexec/java_home+-v"$version");
++++++++java+-version
+}|code-block|syntax|javascript|2qm63|Jayson的回答提供了SDKMAN和jenv的基本命令。以下是有关以下内容的更多信息|19f6v|SDKMAN|6c2nl|和更多信息|f6f4|jenv|5dru6|如果你想了解更多关于这些工具的背景知识。^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|1D|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|1E|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|1F|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|1G|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|1H|9|@]|A|@]|B|$]]|$2|K|4|L|6|7|8|1I|9|@]|A|@]|B|$]]|$2|M|4|N|6|7|8|1J|9|@]|A|@]|B|$]]|$2|O|4|P|6|7|8|1K|9|@]|A|@]|B|$]]|$2|Q|4|R|6|7|8|1L|9|@]|A|@]|B|$]]|$2|S|4|T|6|7|8|1M|9|@]|A|@]|B|$]]|$2|U|4|V|6|7|8|1N|9|@]|A|@]|B|$]]|$2|W|4|X|6|7|8|1O|9|@]|A|@]|B|$]]|$2|Y|4|Z|6|10|8|1P|9|@]|A|@]|B|$11|12]]|$2|13|4|14|6|7|8|1Q|9|@]|A|@]|B|$]]|$2|15|4|16|6|7|8|1R|9|@]|A|@]|B|$]]|$2|17|4|18|6|7|8|1S|9|@]|A|@]|B|$]]|$2|19|4|1A|6|7|8|1T|9|@]|A|@]|B|$]]|$2|1B|4|1C|6|7|8|1U|9|@]|A|@]|B|$]]]]

This answer extends on Jayson's excellent answer with some more opinionated guidance on the best approach for your use case:
<ul>
<li>SDKMAN is the best solution for most users. It's easy to use, doesn't have any weird configuration, and makes managing multiple versions for <a href="https://sdkman.io/sdks" rel="nofollow noreferrer">lots of other Java ecosystem</a> projects easy as well.</li>
<li>Downloading Java versions via Homebrew and switching versions via jenv is a good option, but requires more work. For example, <a href="https://stackoverflow.com/a/29195815/1125159">the Homebrew commands in this highly upvoted answer</a> don't work anymore. jenv is slightly harder to setup, the <a href="https://github.com/jenv/jenv/tree/master/available-plugins" rel="nofollow noreferrer">plugins</a> aren't well documented, and the README says the project is looking for a new maintainer. jenv is still a great project, solves the job, and the community should be thankful for the wonderful contribution. SDKMAN is just the better option cause it's so great.</li>
<li>Jabba is written is a multi-platform solution that provides the same interface on Mac, Windows, and PC (it's written in Go and that's what allows it to be multiplatform). If you care about a multiplatform solution, this is a huge selling point. If you only care about running multiple versions on your Mac, then you don't need a multiplatform solution. SDKMAN's support for tens of popular SDKs is what you're missing out on if you go with Jabba.</li>
</ul>
Managing versions manually is probably the worst option. If you decide to manually switch versions, you can use this Bash code instead of Jayson's verbose code (code snippet from the <a href="https://github.com/AdoptOpenJDK/homebrew-openjdk#switch-between-different-jdk-versions" rel="nofollow noreferrer">homebrew-openjdk README</a>:
<pre><code>jdk() {
 version=$1
 export JAVA_HOME=$(/usr/libexec/java_home -v&quot;$version&quot;);
 java -version
 }
</code></pre>
Jayson's answer provides the basic commands for SDKMAN and jenv. Here's more info on <a href="https://mungingdata.com/java/sdkman-multiple-versions-java-sbt-scala/" rel="nofollow noreferrer">SDKMAN</a> and more info on <a href="https://mungingdata.com/java/jenv-multiple-versions-java/" rel="nofollow noreferrer">jenv</a> if you'd like more background on these tools.

I want to install OpenJDK Java on Mac OSX and have it work alongside other JDK's since it is a newer release. Currently, I downloaded the tar.gz and placed it in my path but that is hard to maintain. 

The only other install I found that do more things automatically is the install via Homebrew cask. It looks like only the current version too:

<pre><code>brew cask info java
</code></pre>

Shows: 

<blockquote>
 java: 13,33:5b8a42f3905b406298b72d750b6919f6 
 <a href="https://openjdk.java.net/" rel="noreferrer">https://openjdk.java.net/</a>
</blockquote>

So I can install it from there, but then what? Am I stuck only with the new version?

How do I install Java on Mac OSX allowing version switching?

Windows

Java

 我想在Mac上安装Java，并让它与其他OpenJDK一起工作，因为它是一个较新的版本。目前，我下载了tar.gz并将其放在path中，但这很难维护。 我发现的唯一一个自动完成更多事情的安装是通过Homebrew cask安装。它看起来也只有当前版本： brew cask info java 显示： java: 13...

问如何在Mac OSX上安装允许版本切换的Java？
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