java - Url loading error for image in runnable jar -

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so, when try following code:

//main class  package com.mgflow58.main;  import java.awt.image.bufferedimage; import java.io.ioexception; import java.net.malformedurlexception; import java.net.url;  import javax.imageio.imageio; import javax.swing.imageicon; import javax.swing.jframe;  public class game {      public static void main(string[] args) {         bufferedimage mainicon = null;         jframe window = new jframe("guppy's adventure");         window.add(new gamepanel());         window.setdefaultcloseoperation(jframe.exit_on_close);         window.setresizable(false);         window.pack();         window.setlocationrelativeto(null);         window.setvisible(true);          try {             string mainurlstring = "icon.gif";             url mainurl = new url(mainurlstring);             try {                 mainicon = imageio.read(mainurl);                 window.seticonimage(new imageicon(mainicon).getimage());             } catch (ioexception e) {                 // todo auto-generated catch block                 e.printstacktrace();             }         } catch (malformedurlexception e) {             // todo auto-generated catch block             e.printstacktrace();         }      }  }

i following error:

java.net.malformedurlexception: no protocol: icon.gif     @ java.net.url.<init>(unknown source)     @ java.net.url.<init>(unknown source)     @ java.net.url.<init>(unknown source)     @ com.mgflow58.main.game.main(game.java:28)

the file icon.gif in root folder, , tried copying src/com/mgflow58/main class executing code in. doing wrong? can not set image icon no matter methods try , have been trying find answer while already.

i have simplified answer previous question. have done stupid mistake somewhere, wrote line anew , problem fixed. how accessed icon.gif:

//main class  package com.mgflow58.main;  import java.awt.image.bufferedimage; import java.io.file; import java.io.ioexception; import java.net.malformedurlexception; import java.net.url;  import javax.imageio.imageio; import javax.swing.imageicon; import javax.swing.jframe;  public class game {      public static void main(string[] args) {         bufferedimage mainicon = null;         jframe window = new jframe("guppy's adventure");         window.add(new gamepanel());         window.setdefaultcloseoperation(jframe.exit_on_close);         window.setresizable(false);         window.pack();         window.setlocationrelativeto(null);         window.setvisible(true);          window.seticonimage(new imageicon(game.class.getresource("/icon.gif")).getimage());      }  }

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