Java and big data are available, the prospects are good, big data is more and have the basis for people to learn, Java, then 0 basic learning is not a problem, the choice of training institutions focus on the organization's reputation, in addition to the word of mouth but also to look at the organization's course system, faculty strength, employment information, expenses and so on, more than the comparison of a few institutions, I hope that you will soon be able to learn to success. The first thing you need to do is to get your hands dirty.