Update the GUI application

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EDUCATIONAL COURSESTUTORIALOUTLET
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Update the GUI application

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• Update the GUI application you have developed so
  far by adding a Java application to store the
  order just made by the customer in a file and
  present a file confirmation message using files
  and streams. You may accomplish this by
  outputting the sub order information to a file.
  Finally, you will read this file to display the
  order confirmation information.
• Output user-entered data to a destination file
  using the file class.
• Input data from a source file using the file
  class.
• Use FileWriter class and PrintWriter class to
  output an order confirmation.

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