A graphical user interface, you can deal with no upper limit of the number of packets, each can accommodate the upper limit of the number of contacts, contacts, such as name, date of birth, telephone, address information interface dynamic display all packet dynamic display all contacts or specify grouping contacts. Contacts sorted by name grouped contact data entered from the keyboard 4 by last name, phone search for contacts, and output information 5. Birthday all contacts between the two specified dates can output the name and date of birth can modify the specified contact information (including its group) modify the name of the grouping 7. delete the specified contact delete the specified packet 8. empty all data 9 to run the program automatically retrieve data, alert the user to the system time within 10 days of birthday contacts and output their name, date of birth, Product Group.

Main.java

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