what is the use of concurrent hash map in java? where we have to use this? what are the comforts in it? help please. how it works? sample codes are easy to understandable..
Is there a way to access the Java Plug-in Control Panel programatically? Or at least find the places in the Windows File System where the information backing that control panel is stored?
I use joomla to build php websites as it has logins , registrations and many extension to make my work easier.
IS some cms available for building webistes in java with some pre loaded features so that i don't have to code it from scratch
Hi,
Does anyone know a library to compare addresses in Java ?
Something that would give equality on addresses, written in different ways.
For example, it should recognize that
"22 Acacia Avenue" and "22 acacia av."
is the same address.
Of course, this can escalate a lot, that's why i'm asking.
Thanks in advance.
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?
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?
I need to write a custom batch File renamer. I've got the bulk of it done except I can't figure out how to check if a file is already open. I'm just using the java.io.File package and there is a canWrite() method but that doesn't seem to test if the file is in use by another program. Any ideas on how I can make this work?
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.
Is it possible to reliably determine the compilation time stamp of a given class for both java applications running locally and as applets and/or JNLP webapps ?
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?
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
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
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.
I am trying to code a game following instructions contained in an OU TMA document which read:
In the constructor, write code to assign a new instance of Random to ran which you should create using the Random class's zero argument constructor
Will this code work?
Random ran = new Random(0) ;
I am a relative newbie to Java, and I don't understand exactly what the instructions mean
I need to implement a cache solution in java for a cluster of 9 servers with web applications. I saw apache JCS, seems old, do you know another open source solution ?
thanks
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.
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?