Can any body please tell me what code is used for clear screen in java? For example in c++ "system("CLS"); " is used just like this what code is used in java for clear screen? Please help. Thanks!
I understand that the jvm is itself an application that turns the bytecode of the java executable into native machine code, but when using native threads I have some questions that I just cannot seem to answer.
Does every thread create their own
instance of the jvm to handle their
particular execution?
If not then does the jvm have to have some way to schedule which thread it will handle next, if so wouldn't this render the multi-threaded nature of java useless since only one thread can be ran at a time?
Switching from JVM 1.4 to 1.5 has performance benefits as per release notes.
http://java.sun.com/j2se/1.5.0/docs/relnotes/features.html#performance
We have Java 1.4 compiled classes which are run on 1.5 JVM, will these classes suffer in performance because they were compiled using 1.4 ?
hey guys
I had made one application in java-swing,
Now what i am getting problem is,
i want to minimize my jframe when it is deactivate and then to maximize i want to activate that window.
So for maximize, i want to activate any jframe using java code.
So how to activate and deactivate any jframe, so that i can do something on window listeners?
thanks in advance.
Are Java annotations used for adding functionality to Java code besides just adding documentation about what's going on in the code? What's the most advanced/complex functionality you could add to your code through an annotation?
test.java:
import javax.media;
Which directories are javax.media searched from?
I suppose those in CLASSPATH specified by javac -cp will of course be searched.
But will it also search in the directory where test.java locates?
And are there any other possible places that will be searched?
A friend of mine came to me with this strange behavior which i can't explain, any insight view would be appreciated.
Im running VS 2005 (C# 2.0), the following code show the behavior
int rr = "test".IndexOf("");
Console.WriteLine(rr.ToString());
the above code, print "0" which clearly show it should have return -1
This also happen in Java where the following Class show the behavior:
public class Test{
public static void main(String[] args){
System.out.println("Result->"+("test".indexOf("")));
}
}
Im running Java 1.6.0_17
The rich text editor must be implemented in Java, provide Swing support, and preferably be open source.
I'm looking to integrate it into an existing Java/Swing application.
Thanks.
Does anyone know of any node.js style webserver framework for java?
I realized that having nonblocking callback behavior while handling a web request will require deep support at the webserver level. I am interested in node.js, but when I have a web server that ends up persisting data, I would like to take advantage of the static type system that Java offers. However, I want the scalability of non-blocking io.
Is there any way to access the Windows Event Log from a java class. Has anyone written any APIs for this, and would there be any way to access the data from a remote machine?
The scenario is:
I run a process on a remote machine, from a controlling Java process.
This remote process logs stuff to the Event Log, which I want to be able to see in the controlling process.
Thanks in advance.
Hello,
I'm looking for a library that could perform "easy" pattern matching, a kind of pattern that can be exposed via GUI to users.
It should define a simple matching syntax like * matches any char and alike.
In other words, I want to do glob (globbing) like sun's implemented logic http://openjdk.java.net/projects/nio/javadoc/java/nio/file/PathMatcher.html but without relation to the file system.
Ideas?
I'm working on a small application in Java that takes a directory structure and renames the files according to a certain format, after parsing the original name.
What is the best Java class / methodology to use in order to facilitate these file operations?
Edit: the question is only regarding the file operations part, I got the "getting the formatted name" down :)
I am building an application based on GXT (Java). Now the problem is that I have to connect the application to a LDAP server. Can you tell me how to connect a LDAP server from our java application and what API I will have to use for that?
Just wondering if anybody has run Scala app or web-app on Java Real-Time system?
I assume because scala is bytecode compatible with regular JVM, then it should not take much effort to run it on a Real Time JVM such as Sun Java Real-Time System ?
I had installed jdk-6u18-windows-i586 on my machine. Later on I uninstalled it and installed jdk 1.5.0_13 instead.
Now when I do javac -version I get
jdk 1.5.0_13
But when I do java -version I get
java version "1.6.0_19"
How do I fix this?
(im new to java)
from my searches for Serialization in Java most of the examples document writing to a file or reading from one.
my question is lets say i have a serializable class AppMessage.
I would like to transmit it as byte[] over sockets to another machine where it is rebuilt from bytes received.
how could i achieve this please?
thanks for your insight in advance.
Hi
I am working with telecom company.I am familiar with java programming language.But now I have a task to write a script , with linux operating systems.I have to write a script for fetching data from other computer and check some conditions. How can I do that using Java. Plz help me.
Thanks.
So I have to send a java project to someone outside our company who has no experience with java and they need to compile it. Is there an easy way to do it on the windows command line that does not require writing out lists of the files?
Personally I think javac should be smart enough to handle
javac *
when in the folder just under the root of the package hierarchy. Is there anything in this ballpark?
I am running Eclipse with Tomcat 5.5.
My dynamic web site project includes some JAVA code that needs external jar files. Where should I place those jar files so Apache will not giving me errors such as java.lang.ClassNotFoundException ?
Thanks on this.
Does anyone know a Library which provides a Thread.sleep() for Java which has an error not higher than 1-2 Millisecond?
I tried a mixture of Sleep, error measurement and BusyWait but I don't get this reliable on different windows machines.
It can be a native implementation if the implementation is available for Linux and MacOS too.
EDIT
The link Nick provided ( http://blogs.sun.com/dholmes/entry/inside_the_hotspot_vm_clocks ) is a really good resource to understand the issues all kinds of timers/sleeps/clocks java has.
I have a system where a central Java controller launches analysis processes, which may be written in C++, Java, or Python (mostly they are C++). All these processes currently run on the same server. What are you suggestions to
Create a central log to which all processes can write to
What if in the future I push some processes to another server. How can I support distributed logging?
Thanks!
I've never seen a good list of free Java libraries.
What are some of your can't-live-without Java libraries?
Note: to keep this poll as useful as possible, please remember:
Post only one library per answer
We don't want duplicate answers, so before posting check if the library has been mentioned already
When adding a new library, provide a short summary of what it does / why you think it's useful
Hi..........
I am creating a notepad application in Java.I have created the text area also the menus .I have a menu called "EDIT" and under that I have "UPPERCASE"..If i select a particular text and click on "UPPERCASE" ,I want the string to be converted into uppercase.
Can anyone tell me how to implement this in Java.