ITEC 2610 Lecture Notes - Text Editor, Java Development Kit, Accounts Payable

84 views13 pages

Document Summary

Week 8: (horstman ch. 16, 16, deite&deitel ch. 16 and lewis&loftus ch. 8. 4) Storage of data in variables and arrays is temporary the data is lost when the program terminates. You have to use files for long-term retention of data. Like programs, files can be stored on storage devices such as magnetic or optical disks. The next is the character and java uses unicode characters built of 2 bytes each (ie 16 bits). Some files work with characters: text files, image files, audio files. But in many industries, such as banking, data is further organized in fields and records. A field is a sequence of characters that convey some meaning. For instance a name can be a field. For instance an employee record in a payroll system has: employee number, name, pay rate, year-to-date earnings, taxes withheld (the first 2 fields are. To facilitate the retrieval of specific records one field of the record is chosen as record key.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents