Object life in main method after frame created

hi
i'm having a slight problem with the life of an object i'm creating in the main method of my application.
i have a JDesktopPane that is initialised in the main class's main method and constructor. within the main method i also add the first internal frame to the desktop.
after the user completes the details of the first frame, another is called (from this first frame) and the first frame is disposed.
the problem is that although all subsequent internal frames added to the desktop outside the main class, they are garbage collected with no problems (i'm using a profiler), however the first frame and the frame created from that first frame are never collected due to the reference maintained in the main class. i've tried adding the creation of these frames outside the main class but given that these methods are called from main the reference is still maintained.
is there any way to create those first 2 frames without the reference being maintained in the main class such that they become elegible for garbage collection? do i have it all wrong perhaps and my approach is bad?? any help would be greatly appreciated.
thanks heaps.
Takis

hi
thanks for your reply.
i tried that and it didn't work. the instance of that first internal frame is still there.
i really am at a loss with this one.
any other suggestions would be greatly appreciated.
Takis

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Hi MuruganK,
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https://msdn.microsoft.com/en-us/library/windows/desktop/aa366778%28v=vs.85%29.aspx?f=255&MSPPError=-2147217396
Is it possible that there are some memory leaks in your application? It would better if you have made a simple sample to reproduce and narrow down this issue.
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Sherin wrote:
Sorry I pasted the previous comment with table format. Here the table format is not working
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Question of the day: In which Thread context does the main method run ?

let's say, you create a JFrame in the main method:
public static void main(String[] args)
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let's suppose, you construct the whole JFrame
inside the constructor, which contains a lot
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AND the JFrame calls setVisible(true) in its
constructor.
-> According to my knowledge, this won't work
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or two quite big exceptions (which usually start
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PLAF, but the whole stacktrace shows, that the
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My Question:
Wouldn't it have been easier to let the JVM
process the main() methods right in the
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Or:
Why is the JVM designed to process the
main() method in a special thread and not
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opinions?
Regards
JPlaz / SnowRaver
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import java.awt.event.*;
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Matt,
it's been so long, I don't have the full answer in my head.
This page on Adobe.com has an example that shows Flash 4
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will be
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Steve
Adobe Community Expert: Authorware, Flash Mobile and Devices
My blog -
http://stevehoward.blogspot.com/
Authorware tips -
http://www.tomorrows-key.com

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FRiveraJr wrote:
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Ok, i might as well include the whole thing - its not too big , and i would like to see if any of it is right really.
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                    !f.toString().substring(55).trim().equalsIgnoreCase("..")) {
                    // Write to index file.
                    URL dirUrl = FtpCheck.class.getResource("./index/"); // get the directory.
                    URL fileUrl = new URL(dirUrl, name + ".txt"); // construct the file path.
                    String filePath = fileUrl.getPath().replaceAll("%20", " "); // fix spaces.
                    BufferedWriter file = new BufferedWriter(new FileWriter(filePath,true));
                    file.write((path + f.toString().substring(55).trim()).substring(3)
                         + ",DIR\n");
                    file.close();
                    iterate(f.toString().substring(55).trim(),ftp);
               // Skip entries "." and ".."
               else if (f.toString().substring(55).trim().equalsIgnoreCase(".") ||
                         f.toString().substring(55).trim().equalsIgnoreCase("..")) {
                         continue;
               // Add files to the index.
               else {
                    URL dirUrl = FtpCheck.class.getResource("./index/"); // get the directory.
                    URL fileUrl = new URL(dirUrl, "index.txt"); // construct the file path.
                    String filePath = fileUrl.getPath().replaceAll("%20", " "); // fix spaces.
                    BufferedWriter file = new BufferedWriter(new FileWriter(filePath,true));
                    file.write((path + f.toString().substring(55).trim()).substring(3)
                         + ",file\n");
                    file.close();
          // End of listing reached, go one directory up.
          ftp.setDirUp();
          // And remove the last directory name from path.
          path = path.substring(0,path.lastIndexOf("/"));
          path = path.substring(0,path.lastIndexOf("/")) + "/";
}which compiles fine.
Here is the class that invokes it:
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.logging.Level;
import java.util.logging.Logger;
* @author Sentinel
public class NewClass {
     public NewClass() {
     public static void main(String args[]) throws MalformedURLException, FileNotFoundException, IOException {
          index t = new index("El Naga","elnaga.sytes.net");
          t.start();
          index t1 = new index("Afacan","afacan.myftp.org");
          t1.start();
     public class index extends Thread {
          String name;
          String adres;
        public index(String Name,String Adres) {
            name = Name;
            adres = Adres;
        @Override
        public void run() {
            try {
                test checker = new test(name,adres);
            catch (IOException ex) {
                 Logger.getLogger(NewClass.class.getName()).log(Level.SEVERE, null, ex);
}when I hit run build fails:
init:
deps-jar:
Compiling 1 source file to C:\Documents and Settings\Sentinel\My Documents\NetBeansProjects\ftpCheck\build\classes
C:\Documents and Settings\Sentinel\My Documents\NetBeansProjects\ftpCheck\src\NewClass.java:19: non-static variable this cannot be referenced from a static context
                index t = new index("El Naga","elnaga.sytes.net");
                          ^
C:\Documents and Settings\Sentinel\My Documents\NetBeansProjects\ftpCheck\src\NewClass.java:20: non-static variable this cannot be referenced from a static context
                index t1 = new index("Afacan","afacan.myftp.org");
                           ^
2 errors
BUILD FAILED (total time: 0 seconds)I (now)know that main method has to be static. I'm stuck and in need of help to overcome this obstacle. Is there a way to do this?

a stab in the dark, but what if you make index a non-internal class. make it a stand-alone class in it's own file. Either that or make it a static inner class (almost the same thing).
Your problem is that an inner class needs an instance of the outer class to start on, and you're not doing this. Another solution would be to do this kludge:
index t = new NewClass().new index("El Naga","elnaga.sytes.net"); // I think this is how to call itBut again better is to make index a stand-alone class.
Edited by: Encephalopathic on Oct 28, 2008 8:06 AM

How to increase the Java Heap Space for a main method

Hello all,
after a given number of calculations inside a class with main-method, I get an OutOfMemoryError (Java Heap Size).
So I'm just trying to increase the Heap Size Creator uses, but it won't work.
After reading a lot of posts and online-articles, I tried the following:
1) I changed the -Xms and -Xmx options (to 512m) both in
$CREATOR/SunAppServer8/domains/creator/config/domain.xml and
$CREATOR/etc/creator.conf (this file also points to the Creator built-in JDK)
2) additionally I tried to start Creator from the console with the respective option:
./creator -J-Xmx512m
The memory toolbar shows the right value, but when I use
System.out.println("JVM maximum memory:\t"+Runtime.getRuntime().maxMemory()/1024+" KB\n");it always says 64 MB, no matter which option I chose in the config-files.
So how can I increase this value?
Regards,
Felix
Message was edited by:
Felice
Message was edited by:
Felice

Thank you very much,
this was an important hint. Additionally I had to create a new "Java Class Library" project with a copy of the needed files (those that are not dependent on the Application Server). Then I could use the option you mentioned.
Unfortunately, when I try to run the file with
java -jar FILENAME.jarit won't work, because the archive is not complete: MANIFEST.MF lacks the main-class and all involved libraries.
I managed to add the main-class attribute manually, but adding all library references seems to be very error-prone.
So does anyone know if I did something wrong or if this is a bug of Creator?
Regards,
Felix

Adding a class to a project in sunone studio that already has a main method

i have a frame class and it contains a main method, I can't figure out how to add a class that makes use of the JDialog and call it from the main class. When i try to add a JDialog, it creates its own main method.
If abc.class is my main method class and dcf.class is my class that makes the dialog GUI, I want abc.class to be able to call it, i can't figure out how to do this in Sun One Studio 5

Having a main() in the JDialog doesn't hurt. It lets you run the JDialog as a standalone - make sure that it looks good, etc. When you run your other class, the main() won't get called. (And you can delete it when you're all debugged.
Alternatively, create a new class, then start it by saying
class MyDialog extends JDialog {
}S1S will be completely happy if you do it that way.

Object life in main method after frame created

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