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POHow to resolve "AWT-EventQueue-0" exception while running applet launched via JNLP
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  1. POHow to resolve "AWT-EventQueue-0" exception while running applet launched via JNLP
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    copied!<p>I am getting <code>Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException</code> while running applet launched via JNLP.</p> <p>My applet code is</p> <pre><code>package com.oprs.common; import java.awt.BorderLayout; import java.awt.Container; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.net.MalformedURLException; import java.net.URL; import javax.jnlp.*; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import org.jfree.util.Log; /** * * @date Aug 29, 2012 11:33:16 AM * @version 1.0 */ public class OprsJNLP { /** * @param args */ static BasicService basicService = null; public static void main(String[] args) { JFrame frame = new JFrame("OPRS"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JLabel label = new JLabel(); Container content = frame.getContentPane(); content.add(label,BorderLayout.CENTER); String message = "Download OPRS Application"; label.setText(message); try { basicService = (BasicService)ServiceManager.lookup("javax.jnlp.BasicService"); } catch (UnavailableServiceException e) { Log.error("service not available", e); } JButton button = new JButton("http://google.com/"); ActionListener listener = new ActionListener() { public void actionPerformed(ActionEvent event) { URL url; try { url = new URL(event.getActionCommand()); basicService.showDocument(url); } catch (MalformedURLException e) { e.printStackTrace(); } } }; button.addActionListener(listener); content.add(button, BorderLayout.SOUTH); frame.pack(); frame.show(); } } </code></pre> <p>I tried to debug and found that basicService is returning null always. In place of google.com i tried with the other url's but still getting the same error. The line <code>basicService.showDocument(url);</code> is where it throws null pointer because my basicService is null. Can some one point out where exactly i am going wrong ?</p> <p>Including my .jnlp</p> <pre><code>&lt;?xml version='1.0' encoding='UTF-8' ?&gt; &lt;jnlp spec='1.0' codebase='http://localhost:9999/' href='oprs.jnlp'&gt; &lt;information&gt; &lt;title&gt;OPRS&lt;/title&gt; &lt;vendor&gt;OPRS&lt;/vendor&gt; &lt;description kind='one-line'&gt; OPRS WEB START &lt;/description&gt; &lt;shortcut online='false'&gt; &lt;desktop/&gt; &lt;/shortcut&gt; &lt;/information&gt; &lt;resources&gt; &lt;j2se version='1.4+' /&gt; &lt;jar href='oprs.jar' main='true' /&gt; &lt;/resources&gt; &lt;application-desc main-class='com.oprs.OprsJNLP' /&gt; &lt;/jnlp&gt; </code></pre>
 

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