First of all, my environment, easy to reference.
System version 10.9.4
No pre-replacement JDK is version 1.7
The target version of the replacement is JDK 1.6
Because Oracle does not provide a Mac version of JDK 1.6
1) so go to Apple website to download Http://support.apple.com/kb/DL1572?viewlocale=en_US
2) After installation can view/system/library/java/javavirtualmachines/1.6.0.jdk/contents/home (equivalent to Javahome)
3) sudo to Contents (/system/library/java/javavirtualmachines/1.6.0.jdk/contents) and sub-Files Plus 775 permissions (chmod-r 775 Contents)
4) Edit ~/.profile (Vim ~/.profile) to add or edit the following content
Java_home=/system/library/java/javavirtualmachines/1.6.0.jdk/contents/home
Path= $JAVA _home/bin: $PATH
Classpath=.: $JAVA _home/lib/dt.jar: $JAVA _home/lib/tools.jar
Export Java_home
Export CLASSPATH
Export PATH
5) Source ~/.profile
6) Restart your computer
Mac OS X 10.9.4 replacement JDK