Java EE (Java Enterprise Edition) General Discussion

i am in an image uploading utility. i hav succesfully uploaded the image to the server directory (say /uploads). but when displaying the uploaded image, i wanna show the picture only if the image exits (bcoz for some records there is no image). so i hav used this code
if(new File("uploads/1.jpg").exists())
{
out.print("image exists");
}
but its not working for me. i got it working fine when i give the full path "D:/Tomcat/webapps/diary/admin/uploads/1.jpg". but i think giving this absolute path is not an efficient method bcoz its a web application, bcoz i may not be able get the absolute path always. so how can i do this by specifieing the relative path
help me ASAP if u can
aleens