JAI: loading image file and check for success

[Andre Raue]

Hello,

how do I check, if an image file was successfully loaded when I use
the Java Advanced Imaging API (JAI)?

I thought, that JAI.create("fileload", ...) should return 'null', when
file loading fails. But this is not the case. I never get a return
value of 'null', even if I try to open a .WAV oder .TXT file. Instead,
I receive a Runtime Exception when calling a method of the returned
image object (see example below).

My configuration:
JAI 1.1.2_1
J2SE SDK 1.4.2_04

-------- Example
// load image
PlanarImage image =
JAI.create("fileload", "C:/someValidPath/noImage.xyz");

if(image == null){
System.out.println("Could not load image!"); //<--- never reached
}

// Print out number of bands
System.out.println("image has " + image.getNumBands() +
" band(s)"); // <--- ! Exception !

-------- End of example


Greetings,

Andre