I'm experienced developer specialised in PHP, Python, etc, but not in Java or C++. I'm thinking how I can switch my career to Java. I feel comfortable that if I find a job in that field I'll pick up the language quickly, though I understand that I will not become a Java export within a month. Can you guys give me a mentor advice what to do in that direction? Will Oracle certification help without real full time experience?
First, there's no such thing as a "career in Java." Nobody has one language they use for their whole career. There is a career including Java or a series of Java jobs. I assume you mean one of these.
Your first step is learning Java - write a lot of code. I Then look for jobs that use both Java and one of the languages you have experience with. That gives you a chance to have an advantage over other applicants.
Having your mentioned sertification is an advantage rather than disadvantage. It would give you a confident related with technical part of the language, but that wouldn't mean it would guarantee you a desired job place. As Jeanne mentioned, it is more a talk about the series of skills you need to have. Knowing one language is almost for sure not enough.
Well, there is no single formulae, a lot depends on your skills to represent yourself during the interview too, a lot depends on the company you're going to try to get place at, a lot depends on the people who are going to interview you, a lot depends on their skills too - there are many factors.
Be yourself, be disciplined and you should catch a success, best luck
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