I want to become good Java developer

Java devloper

I want to be good java developer and i know core java and little bit advanced java now i want to be expert in java can u plz suggest what are steps to be need become good java developer and what is the order to learn the advanced java

Practise makes a man perfect............

I'm fresher from mechanical engineer., I have planned to study java., can u suggest me how to study java and expertise in that field to survive in the software company