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SE-1021 Software Engineering II

Learn about reading and writing text and binary data in different file formats. Explore the BlocksMania game and understand how to load levels and manipulate data.

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SE-1021 Software Engineering II

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  1. SE-1021Software Engineering II • Week 9, Class 3 • Get ready for PollEverywhere! • BlocksMania and File I/O • Reading/Writing text in ASCII, Unicode, and UTF-8 • Reading/Writing binary data • Handy tool for finding files

  2. HW • See hw/ on web • https://faculty-web.msoe.edu/yoder/se1021/hw/ SE-1021 Dr. Josiah Yoder Slide style: Dr. Hornick

  3. PollEverywhere Responses • PollEverywhere responses for the last lecture are available at slides/se1021-9-1-pollEverywhereResponses • Shows what I see for non-anonymous questions SE-1021 Dr. Josiah Yoder Slide style: Dr. Hornick

  4. Useful Resources • JOptionPane advanced features • Dean & Dean, pp. 784-787 • JFileChooser (D&D, pp. 748-753) • JDialog • For creating a more advanced “JOptionPane” (e.g. with multiple fields) • javax.swing.Timer • For having regularly-repeating events (or other timed events) SE-1021 Dr. Josiah Yoder Slide style: Dr. Hornick

  5. Editing binary files • Check out Be.HexEdit SE-1021 Dr. Josiah Yoder Slide style: Dr. Hornick

  6. File I/O (1) • Low-level file I/O for raw byte I/O, similar to System.in.read() and System.out.write() • FileInputStream — reads raw bytes • FileOutputStream — writes raw bytes • Text file I/O for I/O of text • Scanner - reads & parses text (provides readLine) • PrintWriter - writes text • Text file I/O (alternate, perhaps more complicated) • BufferedReader - Provides readLine

  7. File I/O (2) • High-level file I/O for I/O of primitive data types • DataInputStream — reads primitive data types • DataOutputStream — writes primitive data types • Object file I/O for I/O of arbitrary object data • ObjectInputStream — reads arbitrary object data • ObjectOutputStream — writes arbitrary object data SE-1021 Dr. Josiah Yoder Slide style: Dr. Hornick

  8. SE-2811 Dr. Josiah Yoder Slide style: Dr. Hornick

  9. BlocksMania load-level • GameBoard class • (See example) • Simple tile class SE-1021 Dr. Josiah Yoder Slide style: Dr. Hornick

  10. BlocksMania Tile • [TODO: How to prep this question?] • Since the type will be the same for every object from the Tile class, can you think of a better way to store this information? SE-1021 Dr. Josiah Yoder Slide style: Dr. Hornick

  11. Consider this code: for(int col = 0; col<numCols && col<line.length()+1; col++) { c = line.charAt(col+1); } How can we fix this to skip the first character, and have col line up with the column headers? SE-2811 Dr. Josiah Yoder Slide style: Dr. Hornick

  12. DO ONLINE: PollEv.com/ yoderj SE-2811 Dr. Josiah Yoder Slide style: Dr. Hornick

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