java - Unable to load image from Jar -


i'm trying load image jar file. here's line:

image imgtrayicon = new image(display, this.getclass().getresourceasstream("icon.ico"));

i've seen many examples using method when try so, , error saying image invalid. here's stack trace:

 [java] exception in thread "thread-0" org.eclipse.swt.swtexception: invalid image  [java]     @ org.eclipse.swt.swt.error(swt.java:4083)  [java]     @ org.eclipse.swt.swt.error(swt.java:3998)  [java]     @ org.eclipse.swt.swt.error(swt.java:3969)  [java]     @ org.eclipse.swt.internal.image.winicofileformat.loadinfoheader(winicofileformat.java:200)  [java]     @ org.eclipse.swt.internal.image.winicofileformat.loadicon(winicofileformat.java:127)  [java]     @ org.eclipse.swt.internal.image.winicofileformat.loadfrombytestream(winicofileformat.java:119)  [java]     @ org.eclipse.swt.internal.image.fileformat.loadfromstream(fileformat.java:48)  [java]     @ org.eclipse.swt.internal.image.fileformat.load(fileformat.java:84)  [java]     @ org.eclipse.swt.graphics.imageloader.load(imageloader.java:130)  [java]     @ org.eclipse.swt.graphics.imagedataloader.load(imagedataloader.java:22)  [java]     @ org.eclipse.swt.graphics.imagedata.<init>(imagedata.java:331)  [java]     @ org.eclipse.swt.graphics.image.<init>(image.java:545)  [java]     @ systray.run(unknown source)

the icon i'm using valid. i've checked using icon tools. i've tried placing icon in same directory code (not jar-ing it) , using this:

image imgtrayicon = new image(display, "icon.ico");

this works fine, when try put in jar, doesn't. can't seem figure out why happening. i've uncompressed jar check whether file added jar , seems there. jar doesn't has complex folder structure. files , resources in same level of tree.

any ideas on what's wrong here? thanks

here's sample code replicate issue:

example.java

import org.eclipse.swt.widgets.*; import org.eclipse.swt.graphics.*;  class example {      public static void main(string[] args) {         display display = display.getdefault();         image imgtrayicon = new image(display, example.class.getclassloader().getresourceasstream("icon.ico"));     }  }

commands:

javac -cp "swt.jar" example.java jar cf example.jar *.class *.ico java -cp "example.jar;swt.jar" example

seems working on multi-threaded application. stack-trace exception in thread "thread-0" org.eclipse.swt.swtexception: invalid image appears loading image in non-ui thread , trying use in ui element. see this.

within ui thread below code works fine. (the icon file inside test package)

package test;  import java.io.inputstream;  import org.eclipse.swt.graphics.image; import org.eclipse.swt.layout.filllayout; import org.eclipse.swt.widgets.display; import org.eclipse.swt.widgets.shell;  public class icontest  {     public static void main(string[] args)     {         final display display = new display();          shell shell = new shell(display);         shell.setlayout(new filllayout());         shell.setsize(200, 200);         shell.setlocation(20, 20);          inputstream stream = icontest.class.getresourceasstream("/test/icon.ico");           image imgtrayicon = new image(display, stream);          shell.setimage(imgtrayicon);          shell.open();         while (!shell.isdisposed()) {                 if (!display.readanddispatch())                         display.sleep();         }          if(imgtrayicon != null)             imgtrayicon.dispose();          display.dispose();     } }

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