Question: Your task is to create a Java GUI application that will perform data processing and will use files to store that data. An example

Your task is to create a Java GUI application that will perform data processing and will use files to store that data. An example of such application could be a phone book application. The phone book application allows you to add/modify/delete/browse as well as to look up entries. The application must load the data from the file when it starts and the application should save the data back to the file when it closes.

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