(Java) Erro ao conectar com o SQL Server Local

Estou tentando fazer meu projeto conectar com SQL Server Local, porém está apresentando o seguinte erro:

run: Algo deu errado!  java.lang.ClassNotFoundException: C:\Program Files\sqljdbc_6.0\ptb\jre8\sqljdbc42.jar 

O arquivo sqljdbc42 está no destino: C:\Program Files\sqljdbc_6.0\ptb\jre8\sqljdbc42.jar

IP do SQL: 192.168.0.12 – Porta padrão: 1433

Segue o meu código para teste:

package testesql;  import java.sql.Connection; import java.sql.ResultSet; import java.sql.Statement; import java.sql.DriverManager;    //import com.microsoft.sqlserver.jdbc.SQLServerDriver;  /**  *  * @author Ronison Matos  */ public class TesteSQL {  static final String JDBC_DRIVER = "C:\Program Files\sqljdbc_6.0\ptb\jre8\sqljdbc42.jar"; static final String DB_URL = "jdbc:sqlserver://192.168.0.12:1433;DatabaseName=Estoque";  // Database credentials static final String USER = "sa"; static final String PASS = "123456";  public static void main(String[] args) {     // TODO code application logic here        Connection conn = null;     Statement stmt = null;     try {         // Register JDBC driver         Class.forName(JDBC_DRIVER);          // Open a connection         System.out.println("Connecting to database...");         conn = DriverManager.getConnection(DB_URL, USER, PASS);          stmt = conn.createStatement();         String sql = "SELECT cod_prod FROM Produto";          ResultSet result = stmt.executeQuery(sql);          // Show result         while (result.next()) {             // Retrieve by column name             int cod_prod = result.getInt("cod_prod");             //int age = result.getInt("salary");             //String first = result.getString("first");             //String last = result.getString("last");              // Display values             System.out.print("ID: " + cod_prod);             //System.out.print("\t Pay: " + age);             //System.out.print("\tFirst: " + first);             //System.out.println("\tLast: " + last);          }         // Clean-up         result.close();         stmt.close();         conn.close();      } catch (Exception e) {         System.out.println("Algo deu errado! \n" + e);     }  } 

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