connessione a un database

[deleted_2024.08.22]

che non lo trova...
hai letto qui?
http://docs.oracle.com/javase/tutori...ted.html#step3

Devo installare solamente il Connector/J? Non capisco

[deleted_2024.08.22]

Devo installare solamente il Connector/J? Non capisco

package database;
import java.util.*;
import java.sql.*;

/**
 *
 * @author francesco
 */
public class Database {
// JDBC driver name and database URL
   static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";  
   static final String DB_URL = "jdbc:mysql://localhost:3306/";

   //  Database credentials
   static final String USER = "username";
   static final String PASS = "password";
    /**
     * @param args the command line arguments
     */
    public static void main(String[] argc)throws SQLException,ClassNotFoundException  {
        // TODO code application logic here
        
        
    Connection conn = null;
   Statement stmt = null;
   try{
      //STEP 2: Register JDBC driver
      Class.forName("com.mysql.jdbc.Driver");

      //STEP 3: Open a connection
      System.out.println("Connecting to database...");
      conn = DriverManager.getConnection(DB_URL, USER, PASS);

      //STEP 4: Execute a query
      System.out.println("Creating database...");
      stmt = conn.createStatement();
      
      String sql = "CREATE DATABASE STUDENTS";
      stmt.executeUpdate(sql);
      System.out.println("Database created successfully...");
   }catch(SQLException se){
      //Handle errors for JDBC
      se.printStackTrace();
   }catch(Exception e){
      //Handle errors for Class.forName
      e.printStackTrace();
   }finally{
      //finally block used to close resources
      try{
         if(stmt!=null)
            stmt.close();
      }catch(SQLException se2){
      }// nothing we can do
      try{
         if(conn!=null)
            conn.close();
      }catch(SQLException se){
         se.printStackTrace();
      }//end finally try
   }//end try
   System.out.println("Goodbye!");
}//end main
}//end JDBCExample

;

Report degli errori

run:
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
Goodbye!
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:190)
    at database.Database.main(Database.java:34)
BUILD SUCCESSFUL (total time: 0 seconds)

Come mai "com.mysql.jdbc.Driver" è sbagliato? Non capisco