Macでjava(JDK)を使う
MacのJDKにはapple版とoracle版があり両方とも共存できます
Mac版
http://support.apple.com/downloads/#java
oracle版
http://www.oracle.com/technetwork/java/javase/downloads/index.html
http://www.java.com/ja/download/faq/java_mac.xml
http://pouhiro.blog33.fc2.com/blog-entry-132.html
http://toggtc.hatenablog.com/entry/2012/04/28/112031