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  • Changing volume in Java when using JLayer.

    - by Penchant
    I'm using JLayer to play an inputstream of mp3 data from the internet. How do i change the volume of the output? I'm using this code to play it: URL u = new URL(s); URLConnection conn = u.openConnection(); conn.setConnectTimeout(Searcher.timeoutms); conn.setReadTimeout(Searcher.timeoutms); bitstream = new Bitstream(conn.getInputStream()/*new FileInputStream(quick_file)*/); System.out.println(bitstream); decoder = new Decoder(); decoder.setEqualizer(equalizer); audio = FactoryRegistry.systemRegistry().createAudioDevice(); audio.open(decoder); for(int i = quick_positions[0]; i > 0; i--){ Header h = bitstream.readFrame(); if (h == null){ return; } bitstream.closeFrame();

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  • how to unescape XML in java

    - by Bas Hendriks
    Hi, I need to unescape a xml string containing escaped XML tags: &lt; &gt; &amp; etc... I did find some libs that can perform this task, but i'd rather use a single method that can perform this task. Can someone help? cheers, Bas Hendriks

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  • Java: repetition, overuse -- problem?

    - by HH
    I try to be as minimalist as possible. Repetition is a problem. I hate it. When is it really a problem? what is static-overuse? what is field-method overuse? what is class-overuse? are there more types of overuse? Problem A: when it is too much to use of static? private static class Data { private static String fileContent; private static SizeSequence lineMap; private static File fileThing; private static char type; private static boolean binary; private static String name; private static String path; } private static class Print { //<1st LINE, LEFT_SIDE, 2nd LINE, RIGHT_SIDE> private Integer[] printPositions=new Integer[4]; private static String fingerPrint; private static String formatPrint; } Problem B: when it is too much to get field data with private methods? public Stack<Integer> getPositions(){return positions;} public Integer[] getPrintPositions(){return printPositions;} private Stack<String> getPrintViews(){return printViews;} private Stack<String> getPrintViewsPerFile(){return printViewsPerFile;} public String getPrintView(){return printView;} public String getFingerPrint(){return fingerPrint;} public String getFormatPrint(){return formatPrint;} public String getFileContent(){return fileContent;} public SizeSequence getLineMap(){return lineMap;} public File getFile(){return fileThing;} public boolean getBinary(){return binary;} public char getType(){return type;} public String getPath(){return path;} public FileObject getData(){return fObj;} public String getSearchTerm(){return searchTerm;} Related interface overuse overuse of static in a Game

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  • Creating a java library

    - by Albinoswordfish
    This may be a silly question, but right now I have a rather large class that I want to use as a library. Where somebody can simply add this jar file to their classpath. And then simply do an import statement at the top, then he or she can start using this class. Is there anything special I need to do or can I simply just use the jar file built?

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  • Java regex return after first match

    - by user216915
    hi how do i return after the first match of regular expression? (does the Matcher.find() method do that? ) say I have a string "abcdefgeee". I want to ask the regex engine stop finding immediately after it finds the first match of "e" for example. I am writing a method to return true/false if the pattern is found and i don't want to find the whole string for "e". (I am looking for a regex solution ) thanks

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  • compact Number formatting behavior in Java (automatically switch between decimal and scientific notation)

    - by kostmo
    I am looking for a way to format a floating point number dynamically in either standard decimal format or scientific notation, depending on the value of the number. For moderate magnitudes, the number should be formatted as a decimal with trailing zeros suppressed. If the floating point number is equal to an integral value, the decimal point should also be suppressed. For extreme magnitudes (very small or very large), the number should be expressed in scientific notation. Alternately stated, if the number of characters in the expression as standard decimal notation exceeds a certain threshold, switch to scientific notation. I should have control over the maximum number of digits of precision, but I don't want trailing zeros appended to express the minimum precision; all trailing zeros should be suppressed. Basically, it should optimize for compactness and readability. 2.80000 - 2.8 765.000000 - 765 0.0073943162953 - 0.00739432 (limit digits of precision—to 6 in this case) 0.0000073943162953 - 7.39432E-6 (switch to scientific notation if the magnitude is small enough—less than 1E-5 in this case) 7394316295300000 - 7.39432E+6 (switch to scientific notation if the magnitude is large enough—for example, when greater than 1E+10) 0.0000073900000000 - 7.39E-6 (strip trailing zeros from significand in scientific notation) 0.000007299998344 - 7.3E-6 (rounding from the 6-digit precision limit causes this number to have trailing zeros which are stripped) Here's what I've found so far: The .toString() method of the Number class does most of what I want, except it doesn't upconvert to integer representation when possible, and it will not express large integral magnitudes in scientific notation. Also, I'm not sure how to adjust the precision. The "%G" format string to the String.format(...) function allows me to express numbers in scientific notation with adjustable precision, but does not strip trailing zeros. I'm wondering if there's already some library function out there that meets these criteria. I guess the only stumbling block for writing this myself is having to strip the trailing zeros from the significand in scientific notation produced by %G.

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  • Java: remove-common-words-method in the API?

    - by HH
    Related: Forum post Before reinventing the wheel, I need to know whether such method exists. Stripping words according to a list such as list does not sound challenging but there are linguistic aspects, such as which words to stress the most in stripping, how about context?

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  • How to select saxon TransformerFactory in Java

    - by pAkY88
    In my web application I need to use Saxon TransformerFactory to use XSLT 2.0 but I can't use setProperty method because I haven't this right on the web server and there is a Security Manager. So i have read that it's possible to do this: Use the Services API (as detailed in the JAR specification), if available, to determine the classname. The Services API will look for a classname in the file META-INF/services/javax.xml.transform.TransformerFactory in jars available to the runtime. I found this file in WEB-INF/lib/saxon9.jar but when I istantiate a TransformerFactory is always selected default factory and not saxon factory. How can I select Saxon Transformer Factory? Thanks

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  • Can't get past 2542 Threads in Java on 4GB iMac OSX 10.6.3 Snow Leopard (32bit)

    - by fuzzy lollipop
    I am running the following program trying to figure out how to configure my JVM to get the maximum number of threads my machine can support. For those that might not know, Snow Leopard ships with Java 6. I tried starting it with defaults, and the following command lines, I always get the Out of Memory Error at Thread 2542 no matter what the JVM options are set to. java TestThreadStackSizes 100000 java -Xss1024 TestThreadStackSizes 100000 java -Xmx128m -Xss1024 TestThreadStackSizes 100000 java -Xmx2048m -Xss1024 TestThreadStackSizes 100000 java -Xmx2048m -Xms2048m -Xss1024 TestThreadStackSizes 100000 no matter what I pass it, I get the same results, Out of Memory Error at 2542 public class TestThreadStackSizes { public static void main(final String[] args) { Thread.currentThread().setUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() { public void uncaughtException(final Thread t, final Throwable e) { System.err.println(e.getMessage()); System.exit(1); } }); int numThreads = 1000; if (args.length == 1) { numThreads = Integer.parseInt(args[0]); } for (int i = 0; i < numThreads; i++) { try { Thread t = new Thread(new SleeperThread(i)); t.start(); } catch (final OutOfMemoryError e) { throw new RuntimeException(String.format("Out of Memory Error on Thread %d", i), e); } } } private static class SleeperThread implements Runnable { private final int i; private SleeperThread(final int i) { this.i = i; } public void run() { try { System.out.format("Thread %d about to sleep\n", this.i); Thread.sleep(1000 * 60 * 60); } catch (final InterruptedException e) { throw new RuntimeException(e); } } } } Any ideas on now I can affect these results?

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  • Ignore certificate errors when requesting a URL in Java

    - by Ryan Elkins
    I'm trying to print a URL (without having a browser involved at all) but the URL is currently throwing the following: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target I'm calling the URL using a JEditorPane's setPage method, which just takes a URL as a parameter. Assuming I can't change anything server side and I still need to get to this resource, how would I go about ignoring the certificate error (or something else that gets me to my goal)? Accessing this URL via a browser tells me the site is untrusted and asks me if I want to proceed.

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  • Java error on bilinear interpolation of 16 bit data

    - by Jon
    I'm having an issue using bilinear interpolation for 16 bit data. I have two images, origImage and displayImage. I want to use AffineTransformOp to filter origImage through an AffineTransform into displayImage which is the size of the display area. origImage is of type BufferedImage.TYPE_USHORT_GRAY and has a raster of type sun.awt.image.ShortInterleavedRaster. Here is the code I have right now displayImage = new BufferedImage(getWidth(), getHeight(), origImage.getType()); try { op = new AffineTransformOp(atx, AffineTransformOp.TYPE_BILINEAR); op.filter(origImage, displayImage); } catch (Exception e) { e.printStackTrace(); } In order to show the error I have created 2 gradient images. One has values in the 15 bit range (max of 32767) and one in the 16 bit range (max of 65535). Below are the two images 15 bit image 16 bit image These two images were created in identical fashions and should look identical, but notice the line across the middle of the 16 bit image. At first I thought that this was an overflow problem however, it is weird that it's manifesting itself in the center of the gradient instead of at the end where the pixel values are higher. Also, if it was an overflow issue than I would suspect that the 15 bit image would have been affected as well. Any help on this would be greatly appreciated.

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  • How to create a rounded title border in Java Swing

    - by Stephane Grenier
    I do understand that to create a title border, you do something like: BorderFactory.createTitledBorder(" Your Title "); However this creates a rectangle border whereas I need a rectangle with curved corners. Now from what I understand you can create your own custom border by: class CustomBorder implements Border { ... } The problem is that I'm not sure how to write the code that overrides the method: public void paintBorder(Component component, Graphics g, int x, int y, int width, int height) Or better yet, is there a way to do it without implementing your own Border class? And if not, how would you write that custom Title Border? I'm ok with drawing a rectangle with rounded corners, but how do you do it so that there's space for the label too?

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  • Java StringTokenizer, empty null tokens

    - by user69514
    I am trying to split a string into 29 tokens..... stringtokenizer won't return null tokens. I tried string.split, but I believe I am doing something wrong: String [] strings = line.split(",", 29); sample inputs: 10150,15:58,23:58,16:00,00:00,15:55,23:55,15:58,00:01,16:03,23:58,,,,,16:00,23:22,15:54,00:03,15:59,23:56,16:05,23:59,15:55,00:01,,,, 10155,,,,,,,,,,,07:30,13:27,07:25,13:45,,,,,,,,,,,07:13,14:37,08:01,15:23 10160,10:00,16:02,09:55,16:03,10:06,15:58,09:48,16:07,09:55,16:00,,,,,09:49,15:38,10:02,16:04,10:00,16:00,09:58,16:01,09:57,15:58,,,,

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  • Best practices for Java logging from multiple threads?

    - by Jason S
    I want to have a diagnostic log that is produced by several tasks managing data. These tasks may be in multiple threads. Each task needs to write an element (possibly with subelements) to the log; get in and get out quickly. If this were a single-task situation I'd use XMLStreamWriter as it seems like the best match for simplicity/functionality without having to hold a ballooning XML document in memory. But it's not a single-task situation, and I'm not sure how to best make sure this is "threadsafe", where "threadsafe" in this application means that each log element should be written to the log correctly and serially (one after the other and not interleaved in any way). Any suggestions? I have a vague intuition that the way to go is to use a queue of log elements (with each one able to be produced quickly: my application is busy doing real work that's performance-sensitive), and have a separate thread which handles the log elements and sends them to a file so the logging doesn't interrupt the producers. The logging doesn't necessarily have to be XML, but I do want it to be structured and machine-readable. edit: I put "threadsafe" in quotes. Log4j seems to be the obvious choice (new to me but old to the community), why reinvent the wheel...

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  • How to add an image dynamically at runtime in java

    - by Brandon
    I've been trying to load up an image dynamically in runtime for the longest time and have taken a look at other posts on this site and have yet to find exactly the thing that will work. I am trying to load an image while my GUI is running (making it in runtime) and have tried various things. Right now, I have found the easiest way to create an image is to use a JLabel and add an ImageIcon to it. This has worked, but when I go to load it after the GUI is running, it fails saying there is a "NullPointerException". Here is the code I have so far: p = Runtime.getRuntime().exec("python C:\\FaceVACS\\roc.py " + "C:/FaceVACS/OutputCMC_" + target + ".txt " + "C:/FaceVACS/ROC_" + target + ".png"); Icon graph = new ImageIcon("C:\\FaceVACS\\OutputCMC_" + target + ".png"); roc_image.setIcon(graph); panel.add(roc_image); panel.revalidate(); gui.frame.pack(); I tried panel.validate(), panel.revalidate(), and I've also tried gui.getRootPane(), but I can't seem to find anything that will work. Any ideas would be helpful! Thanks

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  • Java Swing Table questions

    - by Dalton Conley
    Hey guys, working on an event calendar. I'm having some trouble getting my column heads to display.. here is the code private JTable calendarTable; private DefaultTableModel calendarTableModel; final private String [] days = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"}; ////////////////////////////////////////////////////////////////////// /* Setup the actual calendar table */ calendarTableModel = new DefaultTableModel() { public boolean isCellEditable(int row, int col){ return false; } }; // setup columns for(int i = 0; i < 7; i++) calendarTableModel.addColumn(days[i]); calendarTable = new JTable(calendarTableModel); calendarTable.getTableHeader().setResizingAllowed(false); calendarTable.getTableHeader().setReorderingAllowed(false); calendarTable.setColumnSelectionAllowed(true); calendarTable.setRowSelectionAllowed(true); calendarTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); calendarTable.setRowHeight(105); calendarTableModel.setColumnCount(7); calendarTableModel.setRowCount(6); Also, Im sort of new with tables.. how can I make the rowHeight split between the max size of the table?

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  • Java File and ByteArray or InputStream - please quick help

    - by Peter Perhác
    I want to use jFuge to play some MIDI music in an applet. There's a class for the MIDI pattern - Pattern - and the only method to load the pattern is from a File. Now, I don't know how applets load files and what not, but I am using a framework (PulpCore) that makes loading assets a simple task. If I need to grab an asset from a ZIP catalogue, I can use the Assets class which provides get() and getAsStream() methods. get() returns the given asset as a ByteArray, the other as an InputStream. I need jFuge to load the pattern from either ByteArray or InputStream. In pseudo-code, I would like to do this: Pattern.load(new File(Assets.get("mymidifile.midi"))); however there is no File constructor that would take a ByteArray. Suggestions, please?

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  • Java OutOfMemoryError strange behaviour

    - by Evgeniy Dorofeev
    Assuming we have a max memory of 256M, why does this code work: public static void main(String... args) { for (int i = 0; i < 2; i++) { byte[] a1 = new byte[150000000]; } byte[] a2 = new byte[150000000]; } but this one throw an OOME? public static void main(String... args) { //for (int i = 0; i < 2; i++) { byte[] a1 = new byte[150000000]; } byte[] a2 = new byte[150000000]; }

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  • Java : Sorting unsorted array in descending order

    - by Bader
    hi guys i had an array of objects , i need to know how should i sort my unsorted array in descending order according to the highest value inside objects i need this using for loops not the easy way. i had done this but it seems there is a problem code student[] temp=new student[s.length]; for (int i=0;i s[i + 1].GetGpa()) { temp[i] = s[i]; } } how should i do it using for loops

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  • Java - Collections.binarySearch with PriorityQueue?

    - by msr
    Hello, Can I use Collections.binarySearch() method to search elements in a PriorityQueue? Otherwise, how can I apply search algorithms to a PriorityQueue? I have this (class Evento implements Comparable): public class PriorityQueueCAP extends PriorityQueue<Evento>{ // (...) public void removeEventos(Evento evento){ Collections.binarySearch(this, evento); // ERROR! } } And I got this error: "The method binarySearch(List, T) in the type Collections is not applicable for the arguments (PriorityQueueCAP, Evento)" Why? Thanks in advance!

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