5 Steps to connect to the database in java

5 Steps to connect to the database in java There are 5 steps to connect any java application with the database in java using JDBC. They are as follows: Register the driver class Creating connection Creating statement Executing queries Closing connection 1) Register the driver class The forName() method of Class class is used to register the driver class. This method is used to dynamically load the driver class. Syntax of forName() method public static void forName(String className)throws ClassNotFoundException   Example to register the OracleDriver class Class.forName("oracle.jdbc.driver.OracleDriver");   2) Create the connection object The getConnection() method of DriverManager class is used to establish connection with the database. Syntax of getConnection() method 1) public static Connection getConnection(String url)throws SQLException   2) public static Connection getConnection(String url,String name,String password)   throws SQLException   Example to establish connection with the Oracle database Connection con=DriverManager.getConnection(   "jdbc:oracle:thin:@localhost:1521:xe","system","password");   3) Create the Statement object The createStatement() method of Connection interface is used to create statement. The object of statement is responsible to execute queries with the database. Syntax of createStatement() method public Statement createStatement()throws SQLException   Example to create the statement object Statement stmt=con.createStatement();   4) Execute the query The executeQuery() method of Statement interface is used to execute queries to the database. This method returns the object of ResultSet that can be used to get all the records of a table. Syntax of executeQuery() method public ResultSet executeQuery(String sql)throws SQLException   Example to execute query ResultSet rs=stmt.executeQuery("select * from emp");      while(rs.next()){   System.out.println(rs.getInt(1)+" "+rs.getString(2));   }   5) Close the connection object By closing connection object statement and ResultSet will be closed automatically. The close() method of Connection interface is used to close the connection. Syntax of close() method public void close()throws SQLException   Example to close connection con.close();