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Index › Programming Questions & Help › Syntax Questions › loadImage null handling problem
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loadImage null handling problem (Read 580 times)
ponckk
loadImage null handling problem
Nov 14th, 2007, 7:49am  
Im trying to handle loading images that may not exist, I handle the null return from the function.

BUT THE PROGRAM STOPS!!!!

how can  I make it not stop after the red message in the console?

please help

PImage x = loadImage("fotos/"+this.nombre+".jpg");
        if(x != null){
         image(x,this.x,this.y,200,200);
       }
       else{
         println("mostrarFoto2");
       }
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fjen
Re: loadImage null handling problem
Reply #1 - Nov 14th, 2007, 8:25am  
PImage x;

try {
   x = loadImage("fotos/"+1+".jpg");
} catch ( Exception e ) {
   x = null;
}
   
if (x != null)
{
    image(x, 5, 5,200,200);
}
else
{
    println("mostrarFoto2");
}


just to let you know:

this.x and x are the same at this level, so you can't do:
image( x, this.x, this.y, 200, 200 );
bacause it says:
draw [image named "x"] at position [image named "x"] .. which is an image not a int / float that you need for the coordinates.

http://www.processing.org/learning/examples/variablescope.html
http://processing.org/reference/this.html

F

(BTW ALL CAPS DOES NOT MAKE US WANT TO ANSWER FASTER)
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ponckk
Re: loadImage null handling problem
Reply #2 - Nov 14th, 2007, 8:32pm  
hello

tried:

PImage z;
   
   try {
     z = loadImage("fotos/"+this.nombre+".jpg");  
   }
   catch ( Exception e ) {
     z = null;
   }

   if (z != null)
   {  
     image(z,this.x,this.y,200,200);  
   }  
   else
   {  
     println("mostrarFoto2");  
   }

but...still the program stops and I get this red message:

"The file "fotos/PictureName.jpg" is missing or inaccessible, make sure the URL is valid or that the file has been added to your sketch and is readable."

please help
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