How should I correct my code to find the mean, median & mode from an array?

Hello everyone,
I have been learning Java for about a month now and am stuck with the following code. There are no highlighted errors on my program when typing it into Eclipse but I get an error message when I try to run my program.
Here is the code:
import java.util.Random;
* <dl>
* <dt>Purpose:
* <dd>Example program that randomly generates, collates and outputs numbers.
* <dt>Description:
* <dd>This program generates 10000 random numbers between 0 and 99 inclusive.
* It also keeps count of how many times each number is generated and prints these
* counts out to the screen in the format of mean, median and mode.
* </dl>
* @author Woodie Woodpeck
* @version $Date: 2008/10/27 14:44:00 $
public class Exercise3Point08
     public static void main(String[] args)
               int[] counts=new int [100];
               for(int i=0;i<100;i++)
                    counts=0;
               Random r=new Random();
               for(int n=0;n<10000;n++)
                    counts[r.nextInt()%100]++;
               double sum=0.0;
               int maxCnt=0;
               int mode = 0;
               int runningCount=0;
               int median = 0;
               for (int i=0;i<100;i++)
                    sum+=(i*counts[i]);
                    if (counts[i]>maxCnt)
                         mode=i;
                         maxCnt=counts[i];
                    if (runningCount<5000&&(runningCount+counts[i])>=5000)
                         median=i;
                    runningCount+=counts[i];
               System.out.println("Mean =" + (sum/10000));
               System.out.println("Median =" + median);
               System.out.println("Mode =" + mode);
Here is my error message:Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
     at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
     at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
And that's it. Hmmmm. Strange. I hope someone can help.
Many Thanks
Wood

Hi Edward,
I moved the file from my college computer to my home computer using a USB stick and changed the workspace path on my Eclipse software to match the files that I transferred. I also cleared out a lot of random code that I had lying around my hard-drive before trying to use the code that I pasted above.
From reading the output I guess there is a problem with the class. Do you think I might have transferred the file from one computer to another incorrectly? Do you know how I can clean and rebuild a project? Eclipse seems quite daunting and awfully complicated for a beginner!
Thanks
Wood

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How should I correct my code to find the mean, median & mode from an array?

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