如何在 Eclipse 中使用 Java 8 文档
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How to use Java 8 docs in Eclipse
提问by rosscarrothers
I'm having issues seeing API documentation for Java 8 in Eclipse. Here's an example of the problem I'm having
我在 Eclipse 中查看 Java 8 的 API 文档时遇到问题。这是我遇到的问题的示例
Calendar myCalendar = Calendar.getInstance();
If I mouse over Calendarthen I see all the correct documentation, however if I mouse over getInstance()I get a message saying
如果我将鼠标悬停在上面，Calendar我会看到所有正确的文档，但是如果我将鼠标悬停在上面，getInstance()我会收到一条消息说
Note: This element has no attached source and the Javadoc could not be found in the attached Javadoc.
注意：此元素没有附加的源代码，并且在附加的 Javadoc 中找不到 Javadoc。
I have the Javadoc location for rt.jar set to http://docs.oracle.com/javase/8/docs/api/, I've also tried downloading a local copy of the docs and had the same problem. Changing the link to the Java 7 docs fixes the problem I'm having.
我将 rt.jar 的 Javadoc 位置设置为http://docs.oracle.com/javase/8/docs/api/，我也尝试下载文档的本地副本并遇到了同样的问题。更改指向 Java 7 文档的链接解决了我遇到的问题。
Eclipse seems to be using the wrong anchor style (not sure how else to word it) when looking for methods. When it looks for the getInstance()method, it checks http://docs.oracle.com/javase/8/docs/api/java/util/Calendar.html#getInstance(), but it should be checking
在寻找方法时，Eclipse 似乎使用了错误的锚点样式（不知道如何表达）。当它寻找getInstance()方法时，它会检查http://docs.oracle.com/javase/8/docs/api/java/util/Calendar.html#getInstance()，但它应该检查
Calendar.html#getInstance--
Calendar.html#getInstance--
All brackets and commas seem to have been replaced by hyphens in the Java 8 doc links. I experienced this problem with Eclipse 4.3 (Kepler), 4.3 with the patches for Java 8, and now with 4.4 (Luna)
Java 8 文档链接中的所有括号和逗号似乎都已被连字符替换。我在 Eclipse 4.3 (Kepler)、带有 Java 8 补丁的 4.3 和现在 4.4 (Luna) 中遇到了这个问题
Is there a way to update Eclipse so that it properly displays the docs in the mouse over tooltips?
有没有办法更新 Eclipse，以便它在工具提示上的鼠标中正确显示文档？
采纳答案by Jigar Joshi
Setting the installed JRE to JDK 8 fixes your problem.
将已安装的 JRE 设置为 JDK 8 可以解决您的问题。
This can be done by going to
这可以通过去完成
Window -> Preferences -> Java -> Installed JRE -> Edit -> Directory and selecting the JDK 8 installation folder
回答by user3569741
I had the same problem. I did set the installed JRE to be JDK8. Still wasn't working until I clicked "edit" on the jre (under 'Installed JREs') then then clicked "Restore Defaults". Then it started working... Looking at each jar in that list I see it sets "Source attachement" and not "Javadoc location". Seems to work.
我有同样的问题。我确实将安装的 JRE 设置为 JDK8。直到我单击 jre 上的“编辑”（在“已安装的 JRE”下）然后单击“恢复默认值”后，仍然无法正常工作。然后它开始工作......查看该列表中的每个 jar，我看到它设置了“源附件”而不是“Javadoc 位置”。似乎工作。
回答by Prateek
Step 1: Windows -> Preference -> Java -> Installed JRE -> Edit -> Directory (Specify the JDK directory (and not JRE))
步骤 1：Windows -> Preference -> Java -> Installed JRE -> Edit -> Directory（指定 JDK 目录（而不是 JRE））
Step 2: Click "Restore Defaults"
第二步：点击“恢复默认设置”
Step 3: Click OK
第三步：点击确定
回答by Casey Murray
This worked for me in Ubuntu 14.10, Eclipse Kepler using openjdk-8
这在 Ubuntu 14.10 中对我有用，Eclipse Kepler 使用 openjdk-8
Window > Preferences > Java > Installed JREs > Click on your java-8-openjdk > Edit
窗口 > 首选项 > Java > 已安装的 JRE > 单击您的 java-8-openjdk > 编辑
For /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/rt.jar:
对于 /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/rt.jar：
set Source attachment to:
将源附件设置为：
/usr/lib/jvm/java-8-openjdk-amd64/src.zip
set Javadoc location to:
将 Javadoc 位置设置为：
file:/usr/share/doc/openjdk-8-doc/api/
NOTE: If you don't already have the openjdk-8 java doc, install:
注意：如果您还没有 openjdk-8 java doc，请安装：
sudo apt-get install openjdk-8-doc
and for the source:
和来源：
sudo apt-get install openjdk-8-source
