A: You need to ask the training centers to allow you to attend a few hours'
free classes. If you think that you are attracted by the teacher's teaching, join them. In addition, if you want to learn professional Java programming, you need to learn about training center's hardware condition.
If the training center uses Windows 95/98 for teaching, I suggest you don't learn Java Servlets and Enterprise JavaBeans with it. Without Windows NT server or workstation, one cannot learn true Java Servlets and Enterprise JavaBeans. If possible, you should set up your own Windows NT box at home.