Loading all jars in a folder at runtime

Question

Hi...
Suppose , i have a folder in which there are many jars which depends upon each others....
I need to load all the jars at one go ....
I am using below code
public URLClassLoader loaderNEW(String jarFileName) {
          File file = new File("D:\\ESTED JAR\\");
     String libDir="D:\\ESTED JAR\\";
     try {
          File dependencyDirectory = new File(libDir);
               File[] files = dependencyDirectory.listFiles();
               URL[] urls = new URL[20];
               for (int i = 0; i < files.length; i++) {
               if (files.getName().endsWith(".jar")) {
               urls[i]=(files[i].toURL());
               //urls.add(files[i].toURI().toURL());
     // Convert File to a URL
     // Create a new class loader with the directory
     ClassLoader loader = new URLClassLoader(urls);
     // Load in the class; Class.childclass should be located in
     // the directory file:/c:/class/user/information
     Class cls = loader.loadClass("user.informatin.Class");
     } catch (MalformedURLException e) {
     return loader;
its is giving error
Exception in thread "main" java.lang.NullPointerException
     at sun.misc.URLClassPath$3.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     at sun.misc.URLClassPath.getLoader(Unknown Source)
     at sun.misc.URLClassPath.getLoader(Unknown Source)
     at sun.misc.URLClassPath.getResource(Unknown Source)
     at java.net.URLClassLoader$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at LoadClass.loaderNEW(LoadClass.java:33)
     at LoadClass.main(LoadClass.java:10)
Please help me out......
Thanks in advance

Answer 1

Use code tags to post codes -- [code]CODE[/code] will display asCODEOr click the CODE button and paste your code between the {code} tags that appear.
} catch (MalformedURLException e) {
}Never swallow exceptions.
at LoadClass.loaderNEW(LoadClass.java:33)Something is null that shouldn't be at line 33 of LoadClass.java
Better go through some beginner tutorials before you play around with ClassLoaders and the like. Identifying the cause of a NullPointerException is much more fundamental than
Loading all jars in a folder at runtimedb