S8356: Java Swing User Experience with real code examples.

3 S8356: Java Swing User Experience with real code examples.

S8356: Java Swing User Experience with real code examples.
SHARE Technical Conference
March 7, 2000

SHARE: It's not an acronym. It's what we do!

TNL (Corrections since presented)
most recent update: March 29, 2000

"Move" WindowExit class to INNER CLASS so can reference other methods to do "graceful" shutdown.
Remove "static" from all method declarations (except main). This error on my part made it necessary to declare all variables used by multiple methods as static, because static methods can only refer to static "class" variables.
Remove all "static" from variables, making them instance variables rather than class variables. This does not make much difference here since there should never be multiple "instances" of JsrVote, but is better coding practice, and would be required if there were multiple threads running JsrVote.
Remove most of set-up logic from main (because it must be static). Instead invoke method init() from main, let it do setup. This also mirrors the way the code would run if this were an applet vs. an application.
Change JsrLineIn:
- int read(inArray[]);
  return line read to 2nd element of inArray,
  return integer is record count (negative at EOF).
  I believe these new methods to be more "OO":
- int getNext(String filename);
  only method that actually reads next record.
  return int is record count (- if EOF).
- String toString();
  return current record/Line.
- int getCount();
  get Count of current record (- if EOF).
  this is actually redundant as getNext returns the count, but is a way to getCount w/o reading next line/record.
- Example of use (old way):
  JsrLineIn file1 = new JsrLineIn();
  String[] strfile1[2];
  strfile1[0] = "C:\reqlook.dxx"
  while (0 <= file1.read(strfile1[]))
  { process records from strfile1[1]; }
- Example of use (new way):
  JsrLineIn file1 = new JsrLineIn();
  String file1Name, file1Line;
  file1Name = "C:\reqlook.dxx"
  while (0 <= file1.getNext(file1Name))
  {
  file1Line = file1.toString();
  process records from file1Line;
  }
- I intend to leave the read method for compatability.
  The class also has open and close methods that are public. However, they are usually only invoked by the method as approprite (open: when a new file name is presented, close: at EOF or new file name).

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S8356: Java Swing User Experience with real code examples. SHARE Technical Conference March 7, 2000

S8356: Java Swing User Experience with real code examples.
SHARE Technical Conference
March 7, 2000