java - How to check if image file exists in classpath through gwt client side? -

i creating image object want set url of image dynamically.

image img =  new image(); if(vehicletype.equals("car"))    img.seturl(images/car.png); else    img.seturl(""); 

here, don't know if car.png exists in images folder in classpath. how can check existence? want set default vehicle image object if car.png not on classpath.

thanks

you can't check if image on class path client side.

what can add errorhandler image adderrorhandler() method can detect if browser can't load image (because doesn't exist on server side example).

image img = new image(); img.seturl("set url"); img.adderrorhandler(new errorhandler() {     @override     public void onerror(errorevent e){         // failed load image     } }); 

note: there image.addloadhandler() method can use detect when image loaded.

another way create method @ server side published in service checks if image availabe, , call method client code.

a side note

if you're 1 writes client code , tell image url images/car.png , you're 1 assembles server side resources, shoudln't happen. @ production environment shouldn't use such checks. if somewhere write img.seturl("images/car.png") should make car.png available @ server side , not bother such runtime client side checks.