java.lang.OutOfMemoryError: Java heap space

[Sotsiak91]

Hello, I'm kinda new to Java and I need your help. I try to make with my friends a new app for a game we like. Anyways..
at some point we get the following error message "Exception in thread "Image Fetcher 3" java.lang.OutOfMemoryError: Java heap space".

In our code we have the following

ImageIcon m13_1i = new ImageIcon("./M13/1.jpg");
Card m13_1 = new Card("Ajani, Caller of the Pride", m13_1i, "M13");

multiple times (with different names of course). After almost ~230 of the above code repeated we get the error.
I believe it is because of the too many ImageIcons and something with memory. How can I solve this??

P.S. After some google I changed netbeans.conf file to this:
netbeans_default_options="-J-client -J-Xss1m -J-Xms256m -J-Xmx768m -J-XX:PermSize=32m -J-Dapple.laf.useScreenMenuBar=true -J-Dapple.awt.graphics.UseQuartz=true -J-Dsun.java2d.noddraw=true -J-Dsun.java2d.dpiaware=true -J-Dsun.zip.disableMemoryMapping=true -J-Dsun.awt.disableMixing=true"
(I change the xss/xms/xmx values) The error changed a bit but is still there.

P.S. Should I use another way to display my images other than ImageIcon?

Thanks in advance

The exact error is

Exception in thread "Image Fetcher 3" java.lang.OutOfMemoryError: Java heap space
 at java.awt.image.DataBufferInt.<init>(DataBufferInt.java:75)
 at java.awt.image.Raster.createPackedRaster(Raster.java:470)
 at java.awt.image.DirectColorModel.createCompatibleWritableRaster(DirectColorModel.java:1032)
 at sun.awt.image.ImageRepresentation.createBufferedImage(ImageRepresentation.java:253)
 at sun.awt.image.ImageRepresentation.setPixels(ImageRepresentation.java:554)
 at sun.awt.image.ImageDecoder.setPixels(ImageDecoder.java:138)
 at sun.awt.image.JPEGImageDecoder.sendPixels(JPEGImageDecoder.java:114)
 at sun.awt.image.JPEGImageDecoder.readImage(Native Method)
 at sun.awt.image.JPEGImageDecoder.produceImage(JPEGImageDecoder.java:136)
 at sun.awt.image.InputStreamImageSource.doFetch(InputStreamImageSource.java:269)
 at sun.awt.image.ImageFetcher.fetchloop(ImageFetcher.java:205)
 at sun.awt.image.ImageFetcher.run(ImageFetcher.java:169)
Exception in thread "Image Fetcher 1" java.lang.OutOfMemoryError: Java heap space
 at java.awt.image.DataBufferInt.<init>(DataBufferInt.java:75)
 at java.awt.image.Raster.createPackedRaster(Raster.java:470)
 at java.awt.image.DirectColorModel.createCompatibleWritableRaster(DirectColorModel.java:1032)
 at sun.awt.image.ImageRepresentation.createBufferedImage(ImageRepresentation.java:253)
 at sun.awt.image.ImageRepresentation.setPixels(ImageRepresentation.java:554)
 at sun.awt.image.ImageDecoder.setPixels(ImageDecoder.java:138)
 at sun.awt.image.JPEGImageDecoder.sendPixels(JPEGImageDecoder.java:114)
 at sun.awt.image.JPEGImageDecoder.readImage(Native Method)
 at sun.awt.image.JPEGImageDecoder.produceImage(JPEGImageDecoder.java:136)
 at sun.awt.image.InputStreamImageSource.doFetch(InputStreamImageSource.java:269)
 at sun.awt.image.ImageFetcher.fetchloop(ImageFetcher.java:205)
 at sun.awt.image.ImageFetcher.run(ImageFetcher.java:169)
Exception in thread "Image Fetcher 2" java.lang.OutOfMemoryError: Java heap space
 at java.awt.image.DataBufferInt.<init>(DataBufferInt.java:75)
 at java.awt.image.Raster.createPackedRaster(Raster.java:470)
 at java.awt.image.DirectColorModel.createCompatibleWritableRaster(DirectColorModel.java:1032)
 at sun.awt.image.ImageRepresentation.createBufferedImage(ImageRepresentation.java:253)
 at sun.awt.image.ImageRepresentation.setPixels(ImageRepresentation.java:554)
 at sun.awt.image.ImageDecoder.setPixels(ImageDecoder.java:138)
 at sun.awt.image.JPEGImageDecoder.sendPixels(JPEGImageDecoder.java:114)
 at sun.awt.image.JPEGImageDecoder.readImage(Native Method)
 at sun.awt.image.JPEGImageDecoder.produceImage(JPEGImageDecoder.java:136)
 at sun.awt.image.InputStreamImageSource.doFetch(InputStreamImageSource.java:269)
 at sun.awt.image.ImageFetcher.fetchloop(ImageFetcher.java:205)
 at sun.awt.image.ImageFetcher.run(ImageFetcher.java:169)
Exception in thread "Image Fetcher 0" java.lang.OutOfMemoryError: Java heap space
 at java.awt.image.DataBufferInt.<init>(DataBufferInt.java:75)
 at java.awt.image.Raster.createPackedRaster(Raster.java:470)
 at java.awt.image.DirectColorModel.createCompatibleWritableRaster(DirectColorModel.java:1032)
 at sun.awt.image.ImageRepresentation.createBufferedImage(ImageRepresentation.java:253)
 at sun.awt.image.ImageRepresentation.setPixels(ImageRepresentation.java:554)
 at sun.awt.image.ImageDecoder.setPixels(ImageDecoder.java:138)
 at sun.awt.image.JPEGImageDecoder.sendPixels(JPEGImageDecoder.java:114)
 at sun.awt.image.JPEGImageDecoder.readImage(Native Method)
 at sun.awt.image.JPEGImageDecoder.produceImage(JPEGImageDecoder.java:136)
 at sun.awt.image.InputStreamImageSource.doFetch(InputStreamImageSource.java:269)
 at sun.awt.image.ImageFetcher.fetchloop(ImageFetcher.java:205)
 at sun.awt.image.ImageFetcher.run(ImageFetcher.java:169)
Exception in thread "Image Fetcher 1" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Image Fetcher 0" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Image Fetcher 0" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Image Fetcher 1" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Image Fetcher 0" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Image Fetcher 1" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Image Fetcher 0" java.lang.OutOfMemoryError: Java heap space
Exception in thread "Image Fetcher 1" java.lang.OutOfMemoryError: Java heap space

[SurfMan]

Do you really have to adjust the NetBeans setting? Isn't this something you need to change in the run configuration for this application inside Netbeans?

If memory stays a problem, you should cache any icons that are the same and reuse them. Maybe use a graphics program to reduce the size of the icon. If you like to fix things with a hammer, you can increase the -Xmx even more, about 1200-1300m is possible on a 32bit JRE. On 64bit JRE's there is no theoretical limit (besides the memory in the system itself).

[Tolls]

How big (in pixels) are these images?
Are you loading the same image several times (see SurfMans post about cacheing)?

[Sotsiak91]

Ok I solved it, I removed all ImageIcon objects, from now on I create them only when I want to show an image. So everything is fine.

EDIT: I wonder if I can ask a new question here because somehow it relates to my original problem. Anyways:
I have some code like this

Card M13_1 = new Card("Ajani, Caller of the Pride", "1.jpg", "M13");
     
        Card M13_2 = new Card("Ajani's Sunstriker",  "2.jpg", "M13");
                
        Card M13_3 = new Card("Angel's Mercy",  "3.jpg", "M13");
                
        Card M13_4 = new Card("Angelic Benediction",  "4.jpg", "M13");
               
        Card M13_5 = new Card("Attended Knight",  "5.jpg", "M13");
            
        Card M13_6 = new Card("Aven Squire",  "6.jpg", "M13");
                
        Card M13_7 = new Card("Battleflight Eagle",  "7.jpg", "M13");
                
        Card M13_8 = new Card("Captain of the Watch",  "8.jpg", "M13");
              
        Card M13_9 = new Card("Captain's Call",  "9.jpg", "M13");
                
        Card M13_10 = new Card("Crusader of Odric",  "10.jpg", "M13");

I create a new Object like the above, 1000 times and I don't exaggerate, I noticed that it needs much time for the program to start-up. Because I'm a newbie in programming is the above method right, should I use another way to create the Objects? Is there any trick to improve the performance? Also I have an array table with all those objects. Thanks:)

[DarrylBurke]

1. Follow coding conventions. Variable names should start with a lowercase letter => Code Conventions for the Java Programming Language: Contents

2. Learn to use arrays instead of sequential variable names => Arrays (The Java™ Tutorials > Learning the Java Language > Language Basics)

db

[Tolls]

What does the constructor for Card do?
Because a thousand basic objects with three reference attributes will not take long to create at all.