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  • Simple Java AMPQ server

    - by splix
    Are there exists an simple AMPQ server/broker implementation written in Java? I need it only for local integration tests, starting it from ant/maven, and i don't need any features like a clustering, persistence, performance and so on. Just a fake RabbitMQ-like instance, without installation (just as a dependency at maven pom) and configuration.

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  • When does Java's JVM unzip jar files?

    - by TwentyMiles
    Java's jar file format builds off of the zip file format, and supports compression of the class files inside it. When and how does the JVM decide which class files to uncompress and pull out of the jars on its classpath? Is the process dynamic and done at runtime as classes are needed, or are they all uncompressed up front before the program actually runs?

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  • java timer for game

    - by user261002
    I have created a game in java and now I just need to add a timer that allow the user to play under 60s. I have searched on internet and found the timer for swing and util packages. could you please just give me a method to be able to use it in my game???

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  • identifiers in java with different versions?

    - by GK
    as we "No keyword should be used as an Identifier in java". But there will be some words like asser or enum or any other which have been added as keyword in version 1.4, 1.5 resp. So if any older version code is used to compile with new javac, what happens if that code contains these words as an identifier?

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  • JAVA String split on interval

    - by user2920611
    I would like to split my strings in JAVA based on a regular interval, not on regex. This is what I have to split: 1 x3.1.105.41 1 -10 2 x4.1.105.41 0 -10 3 x12.1.105.41 0 -10 4 y3.1.105.41.19 1 0 5 y4.1.105.41.21 0 0 6 y1.1.105.41.23 0 0 7 y12.1.105.41.25 0 0 I would like to seperate each column. Currently, I use the strLine.spli function Any help would be great!

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  • What is the best way to modify a few fields in an XML using Java

    - by Kailas J C
    I have a big XML which contains around 300 elements. I need to modify 2 or 3 elements in this xml using Java. I don't want to go for conventional marshalling and unmarshalling as it involves the parsing of the whole XML. How is XPath/XSLT manipulation? I know that I can easily read the data but i need to modify the same and put in back in the same XML. The primary concern here is performance. Kindly advise

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  • How to lock serialization in java?

    - by PaulP89
    I am just starting with JAVA serialization, I have one exercise to do and I need to lock serialization on any class, it is suppose to throw an exception when I attempt to serialize that class. Does anyone know how to do it? Thank you

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  • Java xml binding with wrong xmlns attribute name

    - by Tom Brito
    When I use the annotation: @XmlRootElement(name="RootElement", namespace="namespace") class RootElement { to create xml file from java, it creates the root element as: <ns2:RootElement xmlns:ns2="namespace"> but I wanted to create without the "ns2", like: <RootElement xmlns="namespace"> Any idea how to fix it? Reletad link (example I used to create the xml): http://www.java2s.com/Code/JavaAPI/javax.xml.bind.annotation/XmlRootElementname.htm

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  • Getting default value for java primitive types

    - by ripper234
    I have a java primitive type at hand: Class c = int.class; // or long.class, or boolean.class I'd like to get a 'default value' for this class - specifically the value is assigned to fields of this type if they are not initialized. E.g., '0' for a number, 'false' for a boolean. Is there a generic way to do this? I tried c.newInstance() But I'm getting an InstantiationException, and not a default instance.

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  • Java: "implements Runnable" vs. "extends Thread"

    - by user65374
    From what time I've spent with threads in Java, I've found these two ways to write threads. public class ThreadA implements Runnable { public void run() { //Code } } //with a "new Thread(threadA).start()" call public class ThreadB extends Thread { public ThreadB() { super("ThreadB"); } public void run() { //Code } } //with a "threadB.start()" call Is there any significant difference in these two blocks of code?

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  • Java: unwanted characters at the beginning of a text file

    - by Patrick
    hi, when I write a new text file in Java, I get these characters at the beginning of the file: ¨Ìt This is the code: public static void writeMAP(String filename, Object object) throws IOException { ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(filename)); oos.writeObject(object); oos.close(); } thanks

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  • Is PKCS#1 V2.0 implemented for Java?

    - by Tom Brito
    I need encrypt data using exactly the PKCS#1 V2.0 encryption method (defined in item 7.2.1 of the PKCS#1V2 specification). Is it already implemented for Java? I'm thinking in something like just pass a parameter to javax.crypto.Cipher specifying "PKCS#1V2", I wonder if there is something like this?

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  • Mocking with java 1.4

    - by Filip
    Is there any framework, whick allows to mock concrete classes, not only interfaces in java 1.4? I have third party code with a singleton class, where I wanna change one function, without touching orignal code. Is it possible?

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  • Java execution details in System.out

    - by John
    As I remember there is a magic command line option in Java that turn on writing of operations that are currently executed to console. The output was looked like byte code. I do not mean -verbose, because it prints only class loading, while this option outputs information like memory allocation etc.

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  • Usage of Native in Java.

    - by vaibhav
    I am basically a web application developer, never in my career got a chance of trying out this.. can someone explain the whys and the wherefores for using Native code in java? Thanks a Ton in advance!

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