Getting an Exception like NoClassDefFoundError

[shiva mistry]

When I am trying to run this code from console I getting an error like "Exception Thread main java.lang.NoClassDefFoundError: oracle/jdbc/driver/oracledriver " can any one help me ?I have already provided URL ,username and password in stdDAO object .

import java.io.Console;



public class Userin {

	/**
	 * @param args
	 */
	public static void main(String[] args) {

		StudentDAO stdDAO = new StudentDAO(
				"jdbc:oracle:thin:@localhost:1521:xe", "hr", "hr");
		StudentDO stdDO = new StudentDO();
		int itr = 0;
		Console console = System.console();
		String option = "";
		do {
			System.out.println("\nChoose one of the following:");
			System.out.println("1.Insert STUDENT.");
			System.out.println("2.SEARCH");
			System.out.println("3.UPDATE");
			System.out.println("4.DELETE");
			System.out.println("5.EXIT");

			int choice = Integer.parseInt(console.readLine("Enter ur choice:"));
			switch (choice) {
			case 1:

				String str = console.readLine("Enter GPA");
				double gpa = Integer.parseInt(str);
				stdDO.setGPA(gpa);
				stdDO.setSname(console.readLine("Enter Student Name:"));
				String str1 = console.readLine("Enter HighSchool Size:");
				int hsize = Integer.parseInt(str1);
				stdDO.setHsize(hsize);
				String str2 = console.readLine("Enter Studnet ID:");
				int sid = Integer.parseInt(str2);
				stdDO.setStudentId(sid);
				stdDAO.insertStudent(stdDO);
				break;
			case 2:
				int sids = Integer
						.parseInt(console
								.readLine("\nPlease enter the student Id to be searched:"));
				stdDAO.getStudentByID(sids);
				break;
			case 3:
				int sid1 = Integer
						.parseInt(console
								.readLine("\nPlease enter the student Id to be updated:"));
				stdDO.setStudentId(sid1);
				stdDAO.updateStudent(stdDO);
				break;
			case 4:
				int sid2 = Integer
						.parseInt(console
								.readLine("\nPlease enter the student Id to be deleted:"));
				stdDO.setStudentId(sid2);
				stdDAO.deleteStudent(sid2);
				break;
			case 5:
				System.out.println("Bye");
				System.exit(0);
				itr++;
				break;
			default:
				System.out.println("\nPlease enter a value between 1 to 5.");

			}
			option = console
					.readLine("\nPress 'yes' if you wanna continue.Press any other key to exit.");
		} while (itr == 0 & option.equalsIgnoreCase("yes"));

	}

}

[Greg Charles]

In order to create a JDBC connection to Oracle, which is what StudentDAO must be doing, you have to have the Oracle JDBC driver in your classpath. That's probably going to be in a file called ojdbc14.jar, ojdbc15.jar, or something like that. It depends on which versions of Oracle and Java you are using. The old, old Oracle JDBC driver was in classes12.zip, but I don't think anyone uses that anymore.

[shiva mistry]

Thanks Greg