It's too late. You are still asking that you do not have the heart, if you have the heart, you should directly buy the book back and then start

Learning this thing there is no such thing as late or not late, even if you're 50, and then learn 10 years, you're 60, I believe that the learning of a programming language, with 10 years should be almost the same, what is the use of it? You can teach your juniors, you can share what you have learned to the people who need it, as you are now on Baidu to ask these people here, no one is paid to answer questions.

Learning JAVA in the use of things is a lot, not too difficult, but not so simple. Not what the Internet said the advantages of JAVA ah, characteristics ah what. If you have not learned, 0 foundation, the beginning is a very difficult thing, like some specialized terms, the book will not give you an explanation: bit, variable, true, false, array, tree .........

The most important thing is: persistence !!!! The most important thing is:insist !!!! The most important thing is:Stick !!!!