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  • My Android game runs out of memory when it is closed and opened and couple times.

    - by sirconnorstack
    I have an Android game that has an activity for the menu, and then another activity for the game that creates a SurfaceView and Thread to deal with canvas drawing and game logic. When you exit the game and start it up again too much or if you open and close the keyboard (thus restarting the activity), the game runs out of memory, usually when loading a bitmap: java.lang.OutOfMemoryError: bitmap size exceeds VM budget How can I keep all my images in memory without loading them again when the game changes state, or how can I release them from memory and let them reload when the game is restarted?

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  • GAE/J datastore backup

    - by jb
    What is the easiest way to do a GAE/J datastore backup? It looks like there is python bulkloader.py tool to do backup for Python apps, but what should I do to backup Java app? Is there any way to use python tool?

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  • Generic DRM (Distributed resource management) wrapper

    - by Pavel Bernshtam
    I need to write a software, which launches DRM jobs in a customer environment and monitors those jobs status. It should work with various customer environments and DRMs - like LSF, Sun Grid and others. Can you recommend some 3rd party library, which hides DRM differences from me and has API like "launch job", "get list of jobs", "get job status" etc. ? Both Java and native libraries are good for me.

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  • javax.crypto AES encryption - Do I only need to call doFinal?

    - by Spines
    I want to do AES CBC encryption in Java. I'm using javax.crypto. After I have the Cipher initialized, do I only need to call doFinal on the clear bytes to properly encrypt it? Or do I need to do something with update? Documentation says update: Continues a multiple-part encryption or decryption operation and doFinal Encrypts or decrypts data in a single-part operation, or finishes a multiple-part operation what exactly do they mean by multiple-part encryption?

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  • What hack can I use to suppress an unused function warning?

    - by Yuval A
    Consider a private method which is called from JNI and not used otherwise, generating a compiler warning about an unused method: private void someMethodCalledOnlyFromJNI() { // WARNING: method is never used // .... } This is some legacy code in Java 1.4 - so no dice on @SuppressWarnings. What hack would you use to suppress this compiler warning?

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  • Create a dataset: extract features from text documents (TF-IDF)

    - by BigG
    I've to create a dataset from some text files, writing them as vectors of features. Something like this: doc1: 1,0.45 6,0.001 94,0.1 ... doc2: 3,0.5 98,0.2 ... ... each position of the vector represent a word, and the score is given by something like TF-IDF. Do you know some library/tool/whatever for this? (java is better)

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  • JVM hs_err.log not being generated on Linux

    - by halfwarp
    Hello, I'm currently having some issues with a Java application I'm developing. Namely the JVM is crashing with a segfault. I'm trying to locate the hs_err.log file which should contain some helpful info about the issue. However, I can't find this file. I've used find, locate, etc, and nothing. Any ideas on why the log file isn't being generated?

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  • No Android project type in Eclipse->File->New-Project

    - by Rubberman
    I am running CentOS 5.5 x86_64 with JDK 1.6, Eclipse Galileo, and the 0.9.7 ADT is installed; however, after installation, the Android project type is not available. I have checked in the installed packages list and it is installed. Anybody encounter this problem before? Could it be due to my use of the 64-bit java VM that is installed on my system?

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  • JSONDeserializer.use doesn't convert correctly

    - by user530846
    I'm trying to use flexjson to convert the following json string into a java object: {"inboundDataNotification": { "callbackData": "12345", "inboundData": { "message": "Hello World", "messageId": "mes1234" } }} Using the following method: import flexjson.JSONDeserializer; @RooJavaBean @RooToString @RooJson(fromJsonArrayMethod="", toJsonArrayMethod="", toJsonMethod="") public class InboundData { private String messageId; private String message; public static InboundSMSMessage fromJsonToInboundSMSMessage(String json) { return new JSONDeserializer<InboundSMSMessage>().use(null, InboundSMSMessage.class).deserialize(json); } } All fields are null after this method is invoked. Any ideas what to change here?

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  • Get the number of packages transmitted per connection

    - by Daniel
    How do I get the number of packages transmitted per TCP connection? I am using Java, but i know I will have to fetch the number from the underlying OS, so this quastion applies to Linux and Windows operating systems and will have different answers for each of them, I assume. I need this information to profile the network load of an application which seems to send too many small packages by flushing the socket streams too often.

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  • Best Embedded SQL DB for write performance?

    - by max.minimus
    Has anybody done any benchmarking/evaluation of the popular open-source embedded SQL DBs for performance, particularly write performance? I've some 1:1 comparisons for sqlite, Firebird Embedded, Derby and HSQLDB (others I am missing?) but no across the board comparisons... Also, I'd be interested in the overall developer experience for any of these (for a Java app).

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  • examples of good concurrent programs meant to scale

    - by vishr
    I am looking for seminal and excellent examples of libraries and projects that emulate the good practices of the Java Concurrency in Practice book. The book is marvelous. However, I think supplementing this book reading with code reviews of projects and libraries that make use of the concurrency APIs effectively is necessary to drive the concepts into the brain. One good example of what I am looking for is https://code.google.com/p/concurrentlinkedhashmap/ Can folks help me with finding exemplary, well written code that use the concurrency api well?

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  • Calling super()

    - by Mike
    When do you call super() in Java? I see it in some constructors of the derived class, but isn't the constructors for each of the parent class called automatically? Why would you need to use super?

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  • JBoss 5.1.0 (JSF/Seam) cookies blowing up with accented characters

    - by user283680
    I cannot see this behavior in JBoss 4.2.3. If I try to call addCookie() on HttpServletResponse and my cookie value has accented characters in it (ex. ç) I get this exception: java.lang.IllegalArgumentException: Control character in cookie value, consider BASE64 encoding your value Does anyone know what change in JBoss 5.1.0 could be causing these problems?

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