The listFiles method, with or without a filter does not guarantee any order. It does, however, return an array, which you can sort with Arrays.sort(). File[] files = XMLDirectory.listFiles(filter_xml_files); Arrays.sort(files); for(File _xml_file : files) { … } This works because File is a comparable class, which by default sorts pathnames lexicographically. If you want to … Read more
For Java 6 (and 5 too, I think): BufferedImage bufferedImage = new BufferedImage(image.getWidth(null), image.getHeight(null), BufferedImage.TYPE_INT_RGB); g = bufferedImage.createGraphics(); //Color.WHITE estes the background to white. You can use any other color g.drawImage(image, 0, 0, bufferedImage.getWidth(), bufferedImage.getHeight(), Color.WHITE, null);
How can I create new File (from java.io) in memory , not in the hard disk? Maybe you are confusing File and Stream: A File is an abstract representation of file and directory pathnames. Using a File object, you can access the file metadata in a file system, and perform some operations on files on … Read more
49 is the ASCII value of the char 1. It is the value of the first byte. The stream of bytes that is produced when you enter 10Enter on your console or terminal contains the three bytes {49,48,10} (on my Mac, may end with 10,12 or 12 instead of 10, depending on your System). So … Read more
Reading and Writing in the middle of a file is as simple as using a RandomAccessFile in Java. RandomAccessFile, despite its name, is more like an InputStream and OutputStream and less like a File. It allows you to read or seek through bytes in a file and then begin writing over whichever bytes you care … Read more
Use File‘s getParentFile() method and String.lastIndexOf() to retrieve just the immediate parent directory. Mark’s comment is a better solution thanlastIndexOf(): file.getParentFile().getName(); These solutions only works if the file has a parent file (e.g., created via one of the file constructors taking a parent File). When getParentFile() is null you’ll need to resort to using lastIndexOf, … Read more
The underlying data source for some implementations of InputStream can signal that the end of the stream has been reached, and no more data will be sent. Until this signal is received, read operations on such a stream can block. For example, an InputStream from a Socket socket will block, rather than returning EOF, until … Read more
I’ve searched all over the web and after reading lot of docs regarding connection timeout exception, the thing I understood is that, preventing SocketTimeoutException is beyond our limit. One way to effectively handle it is to define a connection timeout and later handle it by using a try-catch block. Hope this will help anyone in … Read more
When possible, you should not store the entire contents of a file to be served in memory. Instead, aquire an InputStream for the data, and copy the data to the Servlet OutputStream in pieces. For example: ServletOutputStream out = response.getOutputStream(); InputStream in = [ code to get source input stream ]; String mimeType = [ … Read more
When closing chained streams, you only need to close the outermost stream. Any errors will be propagated up the chain and be caught. Refer to Java I/O Streams for details. To address the issue However, if flush() throws a runtime exception for some reason, then out.close() will never be called. This isn’t right. After you … Read more