4/2/2024 0 Comments How to change file extensionThe way to change the file extension in both Windows and Linux is to rename a file providing the new extension. In Linux, such commands are available via a terminal window. Static final String ext = ". Windows operating systems have the MS-DOS command prompt that allows you to manipulatecopy, delete and renamefiles. *Change the extension name of the file recursively just create if it doesn't exist, then call the same code just onceĪrgs = args.substring(0, extIndex) + targetExtension no sense in coding the same thing twice Secondly, what if there are multiple dots in the full filename? lastIndexOf will solve that.Īnd what if the filename contains the extension twice? ![]() String ext =args.substring(args.indexOf(".")) įirst of all, what if there is no extension? indexOf will return -1, which will cause an IndexOutOfBoundsException.
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