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..
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!
Hi
I am noob to parsers.I like to fetch specific data from a website I need to use parsers for that. Can anybody please tel me how to get started with parsers.What do I need to download?
Can anybody the code to fetch the data from a website using parsers in java.
Thanks in advance.
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 am new to regular expressions. I want to use java's replaceAll() function to replace any CSS comments in a string.
Basically I want to use regex to search for anything that is surrounded by "/*" and "*/" and replace it with "".
I read a lot of blogs and see people all the time talking about bad things in the java programming language; a lot of them are about annotations and generics that were added to the language in 1.5 release. What are the things in the language or the API that you don't like or would design differently?
How to use .xml file in applet coding?
I want to save some context in .xml file in java-applet programming.....
I want to make the changes in that file through coding.
how to do this?
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?
We are in web era standalone applications are almost gone everyone wants their internet application to run inside browser, programming languages like Ruby, Python and scala are becoming more and more mainstream.
Sometimes I wonder what these programming language offer which make them top choice of IT companies, if I plan to become a freelance web developer is it worth learning C# or Java. I read beginner's book for both of them, but to master any of them require some time investment.
How do I backup / restore any kind of databases inside my java application to flate files.Are there any tools framework available to backup database to flat file like CSV, XML, or secure encrypted file, or restore from csv or xml files to databases, it should be also capable of dumping table vise restore and backup also.
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?
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.
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?
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
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???
I have a closed source Java application for which vendor has provided APIs for customization. As I have no other documents, i rely completely on the API's javadoc.
I want to trace what methods are actually called in different classes for a particular use case. Is there any way to do that with eclipse?
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!
Hi
I have written an chat application in java, now I like to update my application whenever user registers my chat application I should get a sms on my cell.
I am not getting how should I start with messaging service. Let me know any ideas or links.
Thanks
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?