public static String getFileExtension(URL extUrl) {
//URL: "http://photosaaaaa.net/photos-ak-snc1/v315/224/13/659629384/s659629384_752969_4472.jpg"
// String filename = "";
//PATH: /photos-ak-snc1/v315/224/13/659629384/s659629384_752969_4472.jpg
String extension="";
String path = extUrl.getPath();
//Checks for both forward and/or backslash
//NOTE:**While backslashes are not supported in URL's
//most browsers will autoreplace them with forward slashes
//So technically if you're parsing an html page you could run into
//a backslash , so i'm accounting for them here;
String[] pathContents = path.split("[\\\\/]");
if(pathContents != null){
int pathContentsLength = pathContents.length;
//System.out.println("Path Contents Length: " + pathContentsLength);
// for (int i = 0; i < pathContents.length; i++) {
// System.out.println("Path " + i + ": " + pathContents[i]);
// }
//lastPart: s659629384_752969_4472.jpg
String lastPart = pathContents[pathContentsLength-1];
String[] lastPartContents = lastPart.split("\\.");
if(lastPartContents != null && lastPartContents.length > 1){
int lastPartContentLength = lastPartContents.length;
// System.out.println("Last Part Length: " + lastPartContentLength);
//filenames can contain . , so we assume everything before
//the last . is the name, everything after the last . is the
//extension
String name = "";
for (int i = 0; i < lastPartContentLength; i++) {
// System.out.println("Last Part " + i + ": "+ lastPartContents[i]);
if(i < (lastPartContents.length -1)){
name += lastPartContents[i] ;
if(i < (lastPartContentLength -2)){
name += ".";
}
}
}
extension = lastPartContents[lastPartContentLength -1];
// filename = name + "." +extension;
// System.out.println("Name: " + name);
// System.out.println("Extension: " + extension);
// System.out.println("Filename: " + filename);
}
}
return extension;
}
