Use Java to implement an Internet cafe billing system, you can refer to

网吧计费系统
............\NetBar_Data.MDF
............\NetBar_Log.LDF
............\网吧计费系统
............\............\bak
............\............\...\网吧计费系统
............\............\...\............\About.java~1~
............\............\...\............\About.java~2~
............\............\...\............\About.java~3~
............\............\...\............\About.java~4~
............\............\...\............\Card.java~10~
............\............\...\............\Card.java~11~
............\............\...\............\Card.java~12~
............\............\...\............\Card.java~13~
............\............\...\............\Card.java~14~
............\............\...\............\Card.java~15~
............\............\...\............\Card.java~16~
............\............\...\............\Card.java~17~
............\............\...\............\Card.java~18~
............\............\...\............\Card.java~19~
............\............\...\............\Card.java~20~
............\............\...\............\Card.java~21~
............\............\...\............\Card.java~8~
............\............\...\............\Card.java~9~
............\............\...\............\Computer.java~10~
............\............\...\............\Computer.java~11~
............\............\...\............\Computer.java~12~
............\............\...\............\Computer.java~13~
............\............\...\............\Computer.java~14~
............\............\...\............\Computer.java~15~
............\............\...\............\Computer.java~16~
............\............\...\............\Computer.java~2~
............\............\...\............\Computer.java~3~
............\............\...\............\Computer.java~4~
............\............\...\............\Computer.java~5~
............\............\...\............\Computer.java~6~
............\............\...\............\Computer.java~7~
............\............\...\............\Computer.java~8~
............\............\...\............\Computer.java~9~
............\............\...\............\Down.java~11~
............\............\...\............\Down.java~12~
............\............\...\............\Down.java~13~
............\............\...\............\Down.java~14~
............\............\...\............\Down.java~15~
............\............\...\............\Down.java~16~
............\............\...\............\Down.java~17~
............\............\...\............\Down.java~18~
............\............\...\............\Down.java~19~
............\............\...\............\Down.java~20~
............\............\...\............\Downi.java~1~
............\............\...\............\Exit.java~1~
............\............\...\............\Exit.java~2~
............\............\...\............\Information.java~12~
............\............\...\............\Information.java~13~
............\............\...\............\Information.java~14~
............\............\...\............\Information.java~15~
............\............\...\............\Information.java~16~
............\............\...\............\Information.java~17~
............\............\...\............\Information.java~18~
............\............\...\............\Information.java~19~
............\............\...\............\Information.java~20~
............\............\...\............\Information.java~21~
............\............\...\............\Information.java~22~
............\............\...\............\Information.java~23~
............\............\...\............\Information.java~24~
............\............\...\............\Information.java~25~
............\............\...\............\MainApplication.java~10~
............\............\...\............\MainApplication.java~11~
............\............\...\............\MainApplication.java~12~
............\............\...\............\MainApplication.java~2~
............\............\...\............\MainApplication.java~3~
............\..........

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