JNLP error

Posted on 2008-11-02
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 Source)
Question by:zolf
  • 3
  • 2

Author Comment

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();

Open in new window


Expert Comment

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.

Author Comment

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/">
  <title>Time Check</title>
  <vendor>Java Developer Connection</vendor>
  <homepage href="/jdc" />
  <description>Demonstration of JNLP</description>
  <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"/>
<application-desc main-class="com.MainForm" />

Open in new window

Active Directory Webinar

We all know we need to protect and secure our privileges, but where to start? Join Experts Exchange and ManageEngine on Tuesday, April 11, 2017 10:00 AM PDT to learn how to track and secure privileged users in Active Directory.


Author Comment

ID: 22860738

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

Expert Comment

ID: 22860856
Please give the directory structure
LVL 27

Accepted Solution

rrz earned 500 total points
ID: 22861958
Did you try ?
   ClassLoader cl = this.getClass().getClassLoader();
   Icon icon  = new ImageIcon(cl.getResource("images/SplashScreen2.jpg"));

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

For customizing the look of your lightweight component and making it look lucid like it was made of glass. Or: how to make your component more Apple-ish ;) This tip assumes your component to be of rectangular shape and completely opaque. (COD…
Are you developing a Java application and want to create Excel Spreadsheets? You have come to the right place, this article will describe how you can create Excel Spreadsheets from a Java Application. For the purposes of this article, I will be u…
Viewers learn about the “for” loop and how it works in Java. By comparing it to the while loop learned before, viewers can make the transition easily. You will learn about the formatting of the for loop as we write a program that prints even numbers…
Viewers will learn about if statements in Java and their use The if statement: The condition required to create an if statement: Variations of if statements: An example using if statements:

830 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question