通过用户输入键盘Java从mysql数据库中选择记录

My question is that I want to retrieve marks between a lowest and highest range from a database. The user is prompted to enter the lowest and highest range from the keyboard. I have a problem in my sql query where it is not recognising the cpa1 & cpa2 range that I have specified from the keyboard input. Please help. My question is that I want to retrieve marks be