Error while Run a JDBC Program - jdbc

Question

I am using MySQL 5.5 and mysql-connector-java-5.1.15.(both are Installed new)
I tried a JDBC Program by using Notepad and Command Prompt.
My JDBC Program:
import java.sql.*;
import java.io.*;
public class MysqlConnect{
public static void main(String[] args) {
System.out.println("MySQL Connect Example.");
Connection conn = null;
String url = "jdbc:mysql://localhost:3306/";
String dbName = "employement";
String driver = "com.mysql.jdbc.Driver";
String userName = "root";
String password = "12345";
try {
Class.forName(driver).newInstance();
conn = DriverManager.getConnection(url+dbName,userName,password);
System.out.println("Connected to the database");
conn.close();
System.out.println("Disconnected from database");
} catch (Exception e) {
e.printStackTrace();
}
}
}
I have created a database named employement in mysql....
I try to run this Program...
C:\Users\Innodea\Desktop>javac MysqlConnect.java
C:\Users\Innodea\Desktop>java MysqlConnect
Exception in thread "main" java.lang.NoClassDefFoundError: MysqlConnect
Caused by: java.lang.ClassNotFoundException: MysqlConnect
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: MysqlConnect. Program will exit.
How to clear this error?
Also I have tried as follows,
C:\Users\Innodea\Desktop>set classpath=C:\Program Files\MySQL\mysql-connector-ja
va-5.1.15\mysql-connector-java-5.1.15.jar
C:\Users\Innodea\Desktop>javac MysqlConnect.java
C:\Users\Innodea\Desktop>java MysqlConnect
Exception in thread "main" java.lang.NoClassDefFoundError: MysqlConnect
Caused by: java.lang.ClassNotFoundException: MysqlConnect
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: MysqlConnect. Program will exit.
Again also same error occurs please Help me to clear this error and Run JDBC Program....

Answer 1

java -cp .;C:\Program Files\MySQL\mysql-connector-java-5.1.15\mysql-connector-java-5.1.15.jar MysqlConnect

Answer 2

try using this -
java -cp %CLASSPATH%;.; MysqlConnect.java
Or add . to your classpath to read it like
set classpath=C:\Program Files\MySQL\mysql-connector-ja va-5.1.15\mysql-connector-java-5.1.15.jar;.;
Your current class also needs to be on classpath and hence the dot - current directory.

Answer 3

Using the -cp switch should work
java -cp=.;C:\Program Files\MySQL\mysql-connector-java-5.1.15\mysql-connector-java-5.1.15.jar MysqlConnect
It is almost never needed to set the CLASSPATH environment variable