Hi
We can resrict the creation of object of a class by making it's constructor private.
But this constructor could still be called from within the class.
is there anyway to prevent this in Java?
Thnx.
Hi i just like to know is there any open source data mining software written in java that is approximately less than 3k lines of codes?
If yes, please give download link
i need to do software testing
thank you.
I want to track the face using web camera in java.
How to do this? can any one tell me the way or else the link on which i can get the information about this?
In Java is there an equivalent to the C# "using" statement allowing to define a scope for an object:
using (AwesomeClass hooray = new AwesomeClass)
{
// Great code
}
This has probably allready been asked but the keywords make it difficult to find a relevant question.
A simple question: what is the more efficient way to access a db in Java/JDBC?
I'm a web developper and I'd like to write some reusable and scalable code.
What can you suggest?
greetings, today i have started to learn java using netbeans ide.
i would like my jframe to display an icon as stated in the following:
setIconImage(Toolkit.getDefaultToolkit().getImage("SartreIcon.jpg"));
the questin is under netbeans ide.. exactly in which folder do i place the graphic in question in order to load it?
thanks.
I know use System.exit(0) can end a java program, for instance, if I have a JFrame window, it will close and end the program, but I wonder how many other ways, can it be closed and the program be ended ? Including when an error occurs, will the program be shut down and the JFrame be closed ?
Hello,
I'm working on a project and need a simple free java HTML wysiwyg editor can anyone point me in the right direction?.
It only has a small space to fit into, so something fairly simple would be best.
Thanks for the help!
I would like to program Java servlets using Eclipse and I plan on deploying them using Tomcat. I think I can build the projects using Ant which is bundled with Eclipse. I have the standard Eclipse IDE. What options do I have for doing Servlet development in Eclipse? What changes do I need to make to Eclipse? Do I need to install a plug-in?
I have a dll namely product.dll created using .net. How can i access that dll's constructor or method using java code.. Is it possible to access without using JNI?
what is the best OCR package you've used with java?
I need to parse mainly numbers in a single font and am looking for a well architected, lite weight library to use.
thanks.
Hello,
I have a test class that has a @Resource annotation for a setter and I need to make it Java 1.4 compliant, so obviously the annotation has to go. I'm using Spring.
So, how would I replace something like @Resource("my.resource") so that the setter gets the correct dependency injection? Would I need to make a bean in an xml file?
I'm pretty new to this so if I'm not providing enough information, let me know.
In .NET you can achieve something like this:
Color yellowColor = Color.FromName("yellow");
Is there a way of doing this in Java without having to resort to reflection?
PS: I am not asking for alternative ways of storing/loading colors. I just want to know wherever it is possible to do this or not.
I need to make a small test program in java which has to communicate with remote Windows server using telnet, or openSSH. Which library would you suggest to use? I'd like to use a well documented and stable library.
I need to read a Excel 2007 xlsx file in a java application. Does anyone know of a good api to accomplish this task?
Thanks in advance for any advice given.
-MrPortico
I have a video stream from that is acesssed through an ip address over the internet. IS there any way to embed this into a java applications GUI? Think I maybe need code for embeedding a browser or something like that maybe?
There was an earlier thread on Java graph or chart library, where JFreeChart was found to be quite good, but, as stated in its FAQ, it's not meant for real-time rendering.
Can anyone recommend a comparable library that supports real-time rendering? Just some basic xy-rendering - for instance, getting a voltage signal from data acquisition system and plotting it as it comes (time on x-axis, voltage on y-axis).
I have got a form in Java (Swing) loading large amount of data from the database. I want to display a progress bar while the program gets actually loaded.
How can i do it??
Hi all,
I need to create daemon that will monitor certain directory and will process every file that's written to that particular path.
My choice is either java or python.
Did you guys have any experience using both technology? what is the best one?
As we use "default" keyword as a access specifier, and it can be used in switch statements as well with complete different purpose, So i was curious that is there any other keywords in java which can be used in more then one purposes
As we use "default" keyword as a access specifier, and it can be used in switch statements as well with complete different purpose, So i was curious that is there any other keywords in java which can be used in more then one purposes
What's the simplest way of printing an array of primitives or of objects in Java? Here are some example inputs and outputs:
int[] intArray = new int[] {1, 2, 3, 4, 5};
//output: [1, 2, 3, 4, 5]
String[] strArray = new String[] {"John", "Mary", "Bob"};
//output: [John, Mary, Bob]
In my understanding a singleton object will destroy only when the application is about to terminate. So in C++ I write a Singleton class to log my application and in that Singleton logger's destructor I log the time when my application was terminated. Things worked perfectly in C++.
Now I want to have that same logger in Java, as in java there is no destructor so I implemented the finalize method for that singleton logger. But it seem that finalize method actually never get called.
So, I add that System.runFinalizersOnExit(true); line, somewhere in my code (though I know it is deprecated) and that finalize method get called every time before termination of the app. But still there is a problem! If I try to write anything on file in that finalize method, It does not work, though System.out work without any problem! :(
Can you guys help me on this problem? Here is a sample code of what I am try to do:
Singleton Logger Class:
public class MyLogger {
FileWriter writer;
private MyLogger() {
try {
this.writer = new FileWriter("log.txt");
}
catch (IOException ex) {
}
}
public static MyLogger getInstance() {
return MyLoggerHolder.INSTANCE;
}
private static class MyLoggerHolder {
private static final MyLogger INSTANCE = new MyLogger();
}
@Override
protected void finalize () {
try {
super.finalize();
System.out.println("Here"); //worked correctly.
this.writer.write(new Date().toString()+System.getProperty("line.separator"));
this.writer.write("End");
this.writer.flush(); //does not work!
this.writer.close();
}
catch (Throwable ex) {
}
}
public synchronized void log(String str) {
try {
this.writer.write(new Date().toString()+System.getProperty("line.separator"));
this.writer.write(str+"\n");
this.writer.flush();
}
catch (IOException ex) {
}
}
}
Main:
public class Main {
public static void main(String[] args) {
System.runFinalizersOnExit(true);
MyLogger logger = MyLogger.getInstance();
logger.log("test");
}
}