JDBC Hello World program

Register the driver you want:

static{

// register Oracle JDBC driver with DriverManager
     Class.forName("oracle.jdbc.driver.OracleDriver");

}

Create a connection object:

//Create a method, in which we will create connection

public void createConnection(){

Connection conn=null;

Now just open the connection:

try{  // get a connection to the database
     conn = DriverManager.getConnection(
   "jdbc:oracle:thin:@localhost:1521:XE", 
   "scott", 
   "tiger");

     // construct a Statement
     Statement stmt = conn.createStatement();

     // run query
     ResultSet rs = stmt.executeQuery("SELECT 'Hello World' FROM DUAL;");

     // iterate through the result set
     while (rs.next()) {
           System.out.println(rs.getString(1));
     }
}
catch(Exception ex){//deal with exception}

}//end method