Jar file created with Eclipse: Could not find the main class: UI.MainWindow. Program will exit
classnotfoundexception, eclipse, jar, java, program-entry-point
Solution
This is usually a case that occurs when one or more of your required dependency jar files are not included on your class path, and from the `MANIFEST` snippet you included, it seems this is your problem.
On another note, you might wanna use the Export `Runnable Jar` feature, this guarantees that your exported jar will work, given that your `Runtime Configuration` used as template for exporting this jar is proper.
Problem
I have a Java application developed with Eclipse. I have tried to export it as a .jar file, to run it indipendently, but if I try to run it with the command java -jar application.jar I get this error: ``` Exception in thread "main" java.lang.NoClassDefFoundError: org/jfree/data/xy/XYDataset Caused by: java.lang.ClassNotFoundException: org.jfree.data.xy.XYDataset at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccesController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$%AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ``` Could not find the main class: UI.MainWindow. Program will exit Currently, the main class is MainWindow.class. It contains a public static void main(String[] args) method. I have checked the manifest.mf file and it seems correct: ``` Manifest-Version: 1.0 Main-Class: UI.MainWindow ``` I am using a Eclipse IDE for Java Developers version: Helios Release, on a 64-bit Windows 2008 system. What could I do? How could I solve this? What's the sense of the org/jfree/data/xy/XYDataset error? Thanks