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PONot able to execute jar file. Getting NoClassDefFoundError
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  1. PONot able to execute jar file. Getting NoClassDefFoundError
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    copied!<p>I have created a executable jar file using build. </p> <pre><code>&lt;target name="deploy" depends="compile"&gt; &lt;jar jarfile="${deploy.home}/${app.name}.jar" basedir="${build.home}"&gt; &lt;manifest&gt; &lt;attribute name="Main-Class" value="abc.xyz"/&gt; &lt;/manifest&gt; &lt;/jar&gt; </code></pre> <p>Here the xyz call has the main method to execute the whole program..</p> <pre><code>public static void main(String[] args) { File buildFile = new File("build.xml"); Project p = new Project(); p.setUserProperty("ant.file", buildFile.getAbsolutePath()); p.init(); ProjectHelper helper = ProjectHelper.getProjectHelper(); p.addReference("ant.projectHelper", helper); helper.parse(p, buildFile); p.executeTarget(p.getDefaultTarget()); } </code></pre> <p>The jar file is being created successfuly. When I execute the like <code>java -jar appname.jar</code>, it is throwing exception -- </p> <pre><code>Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/tools/ant/Project at abc.xyz.main(xyz.java:20) Caused by: java.lang.ClassNotFoundException: org.apache.tools.ant.Project at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) </code></pre> <p>The project class not found. Its there in <code>ant.jar</code>.</p> <p>But when i execute the <code>abc.java</code> class simply by on command prompt java abc its working fine. </p> <p>Pleased help me to get the cause? and its solution. </p>
 

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