步骤如下：
Eclipse中，窗口——首选项－－JAVA－－已安装的JRE——添加。
JRE名称写你的是哪个版本的写哪个版本的，如1.6版本的，你就写JDK1.6.
JRE主目录，单击浏览选择你的JDK路经。记住，选择主目录就行了。
这样添加后在JRE系统库中会有显示文件。
最后单击确定，就OK了本回答被提问者采纳
jdk跟Eclipse没有什么关系的。开发工具最好不要追求最新的，找最稳定版的 eclipse的话 3.3-3.8直接都功能来说都比较稳定的。
不同版本Eclipse对JDK版本要求
Eclipse 4.6 (Neon)---需要JDK1.8版本，官网解释如下
Eclipse 4.6 (Neon)isscheduled for release on June 22, 2016.
A Java 8 JRE/JDK is required to run all Neon packages based on Eclipse 4.6. The reasoning behind requiring Java 8 are discussedhere.
Eclipse 4.5 (Mars) ---需要JDK1.7及以上版本，官网解释如下
Eclipse 4.5 (Mars) was released on June 24, 2015.
Consider using the new Installer! Please see 6 Steps to Install Eclipse.
A Java 7 JRE/JDK is required for all Mars package downloads based on Eclipse 4.5. Information concerning tested configurations for Eclipse 4.5 is providedhere.
Eclipse 4.4 (Luna) ---需要JDK1.7及以上版本，官网解释如下
Eclipse 4.4 (Luna) was released on June 25, 2014.
A Java 7 JRE/JDK is required for most of the Luna package downloads based on Eclipse 4.4. Information concerning tested configurations for Eclipse 4.4 is providedhere.
Eclipse 4.3 (Kepler) ---需要JDK1.6及以上版本，官网解释如下
Eclipse 4.3 (Kepler) was released in June 2013.
A Java 6 JRE/JDK is recommended for Eclipse 4.3. More information concerning tested configurations for Eclipse 4.3 is providedhere
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