Friday, 28 September 2012

Computer Program Technology: Java program to add information to ms-access



 CREATE A DATABASE  "addItemDB.mdb" IN MS-ACCESS.
CREATE A TABLE "persons" with the following fields
id- Auto Number
firstName-Text
middleName-Text
familyName-Text
Age- Number
SAVE THE DATABASE.


TYPE THE FOLLOWING CODE IN THE NOTEPAD AND RUN THE PROGRAM

//Java Core Package
import javax.swing.*;
//Java Extension Package
import java.awt.*;
import java.awt.event.*;
import java.sql.*;

public class addItemToDatabase extends JFrame {
   
    //Initializing Components
    private JTextField inputs[];
    private JButton add, reset;
    private JLabel labels[];
    private String fldLabel[] = {"First Name: ","Middle Name: ","Family Name: ","Age: "};
    private JPanel p1;
   
    Connection con;
    Statement st;
    ResultSet rs;
    String db;

    //Setting up GUI
    public addItemToDatabase() {
       
        //Setting up the Title of the Window
        super("Adding Data to the Database");

        //Set Size of the Window (WIDTH, HEIGHT)
        setSize(300,180);

        //Exit Property of the Window
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       
        //Constructing Components
        inputs = new JTextField[4];
        labels = new JLabel[4];
        add = new JButton("Add");
        reset = new JButton("Reset");
        p1 = new JPanel();
       
        //Setting Layout on JPanel 1 with 5 rows and 2 column
        p1.setLayout(new GridLayout(5,2));

        //Setting up the container ready for the components to be added.
        Container pane = getContentPane();
        setContentPane(pane);

        //Setting up the container layout
        GridLayout grid = new GridLayout(1,1,0,0);
        pane.setLayout(grid);
       
        //Creating a connection to MS Access and fetching errors using "try-catch" to check if it is successfully connected or not.
        try {
                Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
                db = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=addItemDB.mdb;";
                con = DriverManager.getConnection(db,"","");
                st = con.createStatement();       
               
                JOptionPane.showMessageDialog(null,"Successfully Connected to Database","Confirmation", JOptionPane.INFORMATION_MESSAGE);
               
            } catch (Exception e) {
                JOptionPane.showMessageDialog(null,"Failed to Connect to Database","Error Connection", JOptionPane.ERROR_MESSAGE);
                System.exit(0);
            }
       
        //Constructing JLabel and JTextField using "for loop" in their desired order
        for(int count=0; count<inputs.length && count<labels.length; count++) {
            labels[count] = new JLabel(fldLabel[count]);
            inputs[count] = new JTextField(20);
           
            //Adding the JLabel and the JTextFied in JPanel 1
            p1.add(labels[count]);
            p1.add(inputs[count]);
        }
       
        //Implemeting Even-Listener on JButton add
        add.addActionListener(
        new ActionListener() {
           
            //Handle JButton event if it is clicked
            public void actionPerformed(ActionEvent event) {
               
                if (inputs[0].getText().equals("") || inputs[1].getText().equals("") || inputs[2].getText().equals("") || inputs[0].getText() == null || inputs[1].getText() == null || inputs[2].getText() == null)
                    JOptionPane.showMessageDialog(null,"Fill up all the Fields","Error Input", JOptionPane.ERROR_MESSAGE);
                   
                else
                   
                try {
                   
                    String add = "insert into person (firstName,middleName,familyName,age) values ('"+inputs[0].getText()+"','"+inputs[1].getText()+"','"+inputs[2].getText()+"',"+inputs[3].getText()+")";
                    st.execute(add); //Execute the add sql
                   
                    Integer.parseInt(inputs[3].getText()); //Convert JTextField Age in to INTEGER
                   
                    JOptionPane.showMessageDialog(null,"Item Successfully Added","Confirmation", JOptionPane.INFORMATION_MESSAGE);
                   
                }catch (NumberFormatException e) {
                    JOptionPane.showMessageDialog(null,"Please enter an integer on the Field AGE","Error Input", JOptionPane.ERROR_MESSAGE);
                }catch (Exception ei) {
                    JOptionPane.showMessageDialog(null,"Failure to Add Item. Please Enter a number on the Field AGE","Error Input", JOptionPane.ERROR_MESSAGE);
                }
            }
        }
        );
       
        //Implemeting Even-Listener on JButton reset
        reset.addActionListener(
        new ActionListener() {
           
            //Handle JButton event if it is clicked
            public void actionPerformed(ActionEvent event) {
                inputs[0].setText(null);
                inputs[1].setText(null);
                inputs[2].setText(null);
                inputs[3].setText(null);
            }
        }
        );
       
        //Adding JButton "add" and "reset" to JPanel 1 after the JLabel and JTextField
        p1.add(add);
        p1.add(reset);
       
        //Adding JPanel 1 to the container
        pane.add(p1);
       
        /**Set all the Components Visible.
         * If it is set to "false", the components in the container will not be visible.
         */
        setVisible(true);
    }
   
    //Main Method
    public static void main (String[] args) {
        addItemToDatabase aid = new addItemToDatabase();
    }
}
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