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This paper describes the architecture of J2ME and MIDP specification, use the Java language to implement a simple cell phone contact book system, to complete a contact to add, delete, modify, query functions. Different from existing phone contacts, it can run any MIDP-enabled mobile phones, avoid the question of using tool software into and out of phone contact book after user change phone.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.