[1185]Bukkit Server Running Help!

Hello EveryOne.
Today i got a new computer,when i reinstall Bukkit,i got this error:

Code:

Exception in thread "main" java.lang.NoClassDefFoundError: org/bukkit/craftbukki
t/Main
Caused by: java.lang.ClassNotFoundException: org.bukkit.craftbukkit.Main
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: org.bukkit.craftbukkit.Main. Program will exit.
Press any key to continue . . .

What i need to do?please help me,it never heppend before!

 

Either a mismatched Java version or you somehow don't have the file in that directory? Do you have the Jar?

 

@b1naryth1ef
Well,i know my computer has compibilty problems with Java RunTime and Java JDK.
That cused the problem?

 

It's possible. What command do you use to start the server?

 

Just re-download the CraftBukkit - it is corrupted. It sometimes happens when you don't finish downloading with your web browser and you
- close it
- run the server before it downloads.