无法找到或加载主类

Question

import java.sql.*;

class TestingDatabase
{
        public static void main(String args[])
        {
            try
            {
                 Class.forName("oracle.jdbc.driver.OracleDriver");
                 Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","system","metalgear");
                java.util.Scanner input = new java.util.Scanner(System.in);
                int i = input.nextInt();
                PreparedStatement ps = conn.prepareStatement("select * from students where sid=?");
                ps.setInt(1,i);
                ResultSet rs = ps.executeQuery();
                rs.next();
                System.out.println(rs.getInt(1));
                System.out.println(rs.getInt(2));

            }
           catch(ClassNotFoundException e){}
           catch(SQLException e){}
       }
}

I saved this code on desktop and compiled it using javac TestingDatabase.java command. It compiled successfully but when I entered the command java TestingDatabase it said Error: could not find or load main class TestingDatabase

I double checked for any spelling mistake but couldn't find one. can anyone suggest any solution.

Answer 1

agree with Young Millie on reviewing the list of possible causes. when testing, i found no problem with either the code or executing it. i used command line:

14:31:28$ javac TestingDatabase.java 14:31:33$ java TestingDatabase 14:31:36$

my best guess is that your classpath which might be incorrect; it should include the current directory (.) at some point or not have a classpath defined at all