I changed the paper size from default to other in print setup dialog.
However, the printing job sometimes prints on the default size paper.

1. Configration
  1.1 OS : Windows95(OSR2)
  1.2 JDK Ver.: kestrel build-P
  1.3 Printer
     (1) Canon Laser shot LBP A309 GII (Page printer)
     (2) Fuji Xerox Laser Press 4150 PSII(Postscript printer)
     (3) Canon LBP-404PS Lite(Postscript Printer)
     (4) Canon Laser shot LBP 450 (Page printer)

2. Reproduction

 Please use the attached file, SetPrintableSample.jar.
 
 1.1 Process
   
   1) Set your printer "Default printer"
   
   2) Execute "java -jar SetPrintableSample.jar"
      -> Canvas will appear, and display the default value of pageformat
         (May be A4 size data)
         
   3) In menu, Select "File" - "PageDialog"
      -> Print Setup Dialog will appear
      
   4) Change the paper size
      -> Initial value may be set "A4", select "Letter" or other.
         ( Keep "Paper source" "Auto select")
      
   5) Click "OK"
      -> The values on the canvas will change
     
   6) In menu, Select "File" - "PrintDialog"
      -> Print Dialog will appear
      
   7) Click "OK"
      -> We hope the data printed on the letter size

3. Source code
  Please see the attached files SetPrintableSample.java and
  SetPrintableSampleCanvas.java