From scratch, approx 300 days and 1500 hours studying. Passed yesterday with 80%. Would like to thank Simon Roberts et al., Khalid A. Mughal et al., Bill Brogden, Bruce Eckel,Javaranch.com, JWhiz.com (excellent tests), JCertify(good in practice mode), Anyone who has ever posted a reply on a forum or resources on the web AND of course Sun for their inspiration and resources. It's been harder than an honours degree in Chemistry or teaching in secondary school but even more rewarding!
Cheers
Jon.