Suitable plugin for syntax highlighting

Hello,

This is my wordpress site –> http://lexiconhub.tk

Actually I want a syntax highlighter which will automatically highlight the java code without me specifying the lines which needs to be highlighted.I have come across number f plugins but could not found any which fulfills this requirement.

Secondly, Preferably , it should be one time installation only and should highlight the codes in all my posts on website which have been previously published without me manually updating and applying the syntax highlighter to them.
Please reply to this, any help will be appreciated.I really need this kind of highlighter.