First, try to learn java in first-tier cities. After all, technology is stronger and employment development is more favorable. Secondly, go to the audition in person to examine the teaching level of the teacher, the perfection of the school curriculum, and whether the class is video teaching or face-to-face teaching. Giving up video teaching, the learning effect is not as good as face-to-face teaching, and it is also important to have a teacher present during self-study. Problems encountered in learning can be communicated with teachers in time, and so on.