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JNLP error

Posted on 2008-11-02
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Last Modified: 2012-05-05
hello there,

i am trying to run my application using jnlp.but i get this error in the console.i can run the application with jar but with jnlp i get this error.please help.

Exception in thread "Thread-17" java.lang.NullPointerException
      at javax.swing.ImageIcon.<init>(Unknown Source)
      at com.FrmSplash.run(FrmSplash.java:11)
      at java.lang.Thread.run(Unknown Source)
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Question by:zolf
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6 Comments
 

Author Comment

by:zolf
ID: 22860716

the line 11 is shown below
JLabel SplashLabel = new JLabel(new ImageIcon(ClassLoader.getSystemResource("images/Splash Screen 2.jpg")));
public void run()

	{

		JLabel SplashLabel = new JLabel(new ImageIcon(ClassLoader.getSystemResource("images/Splash Screen 2.jpg")));

		Dimension screen = 	Toolkit.getDefaultToolkit().getScreenSize();

		

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Expert Comment

by:humanonomics
ID: 22860720
it seems, your application is is not picking up the image file and hence "ClassLoader.getSystemResource("images/Splash Screen 2.jpg")" returns null, which results in that exception.
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Author Comment

by:zolf
ID: 22860737

what do i need to do.please help.below is my jnlp file.the application runs fine using java -jar erp.jar
<?xml version="1.0" encoding="UTF-8"?>

<jnlp spec="1.0+" codebase="file:///C:/JNLP/">

<information>

  <title>Time Check</title>

  <vendor>Java Developer Connection</vendor>

  <homepage href="/jdc" />

  <description>Demonstration of JNLP</description>

</information>

<offline-allowed/>

<security>

  <all-permissions/>

</security>

<resources>

  <j2se version="1.2+" />

  <jar href="erp.jar"/>

  <jar href="looks-2.2.0.jar"/>

  <jar href="sqljdbc.jar"/>

  <jar href="calendar-0.10.jar"/>

  <jar href="commons-collections-3.2.jar"/>

  <jar href="commons-logging-1.1.jar"/>

  <jar href="iText-2.1.3.jar"/>

  <jar href="jasperreports-3.0.0.jar"/>

  <jar href="jcalendar-1.3.2.jar"/>

  <jar href="looks-2.2.0.jar"/>

  <jar href="validation-2.0.1.jar"/>

</resources>

<application-desc main-class="com.MainForm" />

</jnlp>

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Author Comment

by:zolf
ID: 22860738

i also removed the space between the image file name, just in case.but no luck
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LVL 7

Expert Comment

by:humanonomics
ID: 22860856
Please give the directory structure
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LVL 27

Accepted Solution

by:
rrz earned 500 total points
ID: 22861958
Did you try ?
   ClassLoader cl = this.getClass().getClassLoader();
   Icon icon  = new ImageIcon(cl.getResource("images/SplashScreen2.jpg"));
see
http://java.sun.com/javase/6/docs/technotes/guides/javaws/developersguide/development.html#retrieving
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