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 ?
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
I have a Java Swing project for my class. I would like put it on my website so people can use it. However I'm not sure if there is a way to turn it into a servlet. Or do I need to know JavaScript? I'm confused. Is there a way to make my swing application into a servlet automatically?
I'm taking user input from System.in using a java.util.Scanner. I need to validate the input for things like:
It must be a non-negative number
It must be an alphabetical letter
...etc
What's the best way to do this?
I have a java.sql.ResultSet object containg data from a query that was run.
How do I refresh the data in the ResultSet to reflect the current data in the database?
Thanks!
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
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?
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?
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.
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?
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 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?
What would be the least-slow thread-safe mechanism for controlling multiple accesses to a collection in Java?
I am adding objects to the top of a collection and i am very unsure what would be the best performing collection. Would it be a vector or a queue? I originally thought an ArrayList would be fast but i ran some experiments and it was very slow.
EDIT: In my insertion testing a Vector delared using volatile seems to be the fastest?
I anticipate using some images in my Java application. These images will be drawn onto my JPanel using g.drawImage(). The JPanel is resizable and the images should scale as the JPanel increases/decreases in size
Two questions:
What image format is best for this type of desired scalable image? For instance, in this application, an image of size 100x100 may be scaled into an image of size 30x30 or 10x10 or 300x300.
How can I write code to do this scaling?
I have a hexadecimal string "41464353". I want to convert it into bytes. I know the value of this hex string in byte will be "65706783". I want this as answer. Please give me a program for this in Java.
Which CMS are you using in Java and what is your experience with it (in terms of extensibility, usage comfort, framework API, memory usage, performance etc.). I am looking for suggestions.
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