What is the salary after learning Java? It has something to do with personal ability. The better the technology, the easier it is to find a job and the higher the salary, so mastering Java technology is the key. If you want to learn Java technology well, you need more time and energy, usually about 2 weeks, 4-6 months. You should look at it on the spot according to your actual needs, and then choose the one that suits you after the audition. As long as you study hard, the future will naturally not be bad.