MySQL Connection in JAVA

Connection Class for My SQL ( With Type 4 Connection )
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public class Conn {

java.sql.Connection con;

public Conn()
{
try{


Class.forName("com.mysql.jdbc.Driver");

String connectionUrl="jdbc:mysql://localhost/gfg?user=root&password=123";

con=java.sql.DriverManager.getConnection(connectionUrl);

}
catch(Exception ex){javax.swing.JOptionPane.showMessageDialog(null, ex.toString());}
}


}
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required JAR : mysql-connector-java-5.1.6-bin.jar