哭求解决"NoClassDefFoundError"问题??

package shue;
import java.util.*;
import java.sql.*;
import java.lang.*;
import java.text.*;
import java.io.*;

public class StartRun{

public void StartRunMethod() throws SQLException,ClassNotFoundException
{
.....
}

public static void main(String[] args)throws Exception
{
StartRun sta =new StartRun();
sta.StartRunMethod();
}
}

<p class="indent">