Java version of Amazon ad link code creator

As an exercise, I created a Java version of my Amazon Ad Link Generator add-in. It's a stripped down version with a few less bells and whistles, and like the Excel add-in, no validation is performed (except on the 10 digit ISBN/ASIN to make sure it's 10 digits).

It will check and make sure at least the Associates ID and ISBN are filled in. No title or product description are necessary. If you click "Submit" and nothing happens, that means either the Associates ID was left blank, or the ISBN was either left blank or is less than 10 alphanumeric digits.

Otherwise it works exactly the same, generating the link by building a string out of what you type in the textboxes. Clicking "Reset" will clear all the text fields except the associates ID, so you can enter several products in a row without having to reenter that.

Download java source code

import java.awt.event.*;
import java.awt.*;
import javax.swing.*;

public class AmazonAdLinkGenerator extends JFrame
{
	// text fields
	private JTextField txtTitle, txtDescription, txtISBNNumber, txtAssociatesID;
	// labels
	private JLabel lblTitle, lblDescription, lblISBNNumber, lblAssociatesID,
           lblLink;
	// text area
	private JTextArea txtLink;
	private JScrollPane sbrText;

	// buttons
	private JButton btnReset, btnExit, btnSubmit;
	// events
	private ResetButtonHandler rbHandler;
	private ExitButtonHandler ebHandler;
	private SubmitButtonHandler sbHandler;

	private static final String Title = ("Amazon Ad Link Generator");
	private static final int WIDTH = 500;
	private static final int HEIGHT = 300;

	public AmazonAdLinkGenerator()
	{
		// create labels
		lblTitle = new JLabel("Title:", SwingConstants.RIGHT);
		lblDescription = new JLabel("Description:", SwingConstants.RIGHT);
		lblISBNNumber = new JLabel("ISBN/ASIN Number:", SwingConstants.RIGHT);
		lblAssociatesID = new JLabel("Associates ID:", SwingConstants.RIGHT);
		lblLink = new JLabel("HTML Link:", SwingConstants.RIGHT);

		// create text fields
		txtTitle = new JTextField(20);
		txtDescription = new JTextField(20);
		txtISBNNumber = new JTextField(20);
		txtAssociatesID = new JTextField(20);

             // scrolling text area
	     // with help from http://www.abbeyworkshop.com/howto/java/ta_scroll/index.html
		txtLink = new JTextArea(5,20);
		txtLink.setLineWrap(true);
		sbrText = new JScrollPane(txtLink);
		sbrText.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

		/* Buttons */
		// Reset button
		btnReset = new JButton("Reset");
		rbHandler = new ResetButtonHandler();
		btnReset.addActionListener(rbHandler);

		// exit button
		btnExit = new JButton("Exit");
		ebHandler = new ExitButtonHandler();
		btnExit.addActionListener(ebHandler);

		// Submit button
		btnSubmit = new JButton("Submit");
		sbHandler = new SubmitButtonHandler();
		btnSubmit.addActionListener(sbHandler);

		// basic GUI info
		setTitle(Title);
		setResizable(false);
		setSize(WIDTH, HEIGHT);
		setDefaultCloseOperation(EXIT_ON_CLOSE);

		// create content pane and add panels to it
		// with help from:
		// http://www.cis.upenn.edu/~matuszek/cit591-2004/Pages/layout-examples.html
		Container pane = getContentPane();
		pane.setLayout(new BorderLayout());

		JPanel panel = new JPanel();
		panel.setLayout(new GridLayout(4,2));

		panel.add(lblTitle);
		panel.add(txtTitle);
		panel.add(lblDescription);
		panel.add(txtDescription);
		panel.add(lblISBNNumber);
		panel.add(txtISBNNumber);
		panel.add(lblAssociatesID);
		panel.add(txtAssociatesID);

		// second panel
		JPanel secondPanel = new JPanel();
		secondPanel.setLayout(new GridLayout(1,2));

		secondPanel.add(lblLink);
		secondPanel.add(sbrText);

		//third panel
		JPanel thirdPanel = new JPanel();
		thirdPanel.setLayout(new GridLayout(1,3));

		thirdPanel.add(btnSubmit);
		thirdPanel.add(btnReset);
		thirdPanel.add(btnExit);

		// add panels to pane
      pane.add(panel, BorderLayout.NORTH);
		pane.add(secondPanel, BorderLayout.CENTER);
		pane.add(thirdPanel, BorderLayout.SOUTH);

		pack();

		// show GUI
		setVisible(true);

	} // end class method

	// class to handle Reset button click
	private class ResetButtonHandler implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			txtTitle.setText("");
			txtDescription.setText("");
			txtISBNNumber.setText("");
			txtLink.setText("");
		}
	}

	// class to handle Exit button click
	private class ExitButtonHandler implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			System.exit(0);
		}
	}

	// class to handle Submit button click
	private class SubmitButtonHandler implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{

			// check for required fields
			String isbn = new String(txtISBNNumber.getText());
			String assocID = new String(txtAssociatesID.getText());

			if (isbn.length() == 10 && assocID.length() != 0) {
				String title = new String(txtTitle.getText());
				String desc = new String(txtDescription.getText());

			txtLink.setText("<a href="http://www.jpsoftwaretech.com/blog/2009/03/java-version-of-amazon-ad-link-code-creator/"\"http://www.amazon.com/gp/product/" +
					isbn + "?ie=UTF8&tag=" + assocID +
					"&linkCode=as2&camp=1789&creative=9325&creativeASIN=" +
					isbn + "\"" + "><img src="http://www.jpsoftwaretech.com/blog/2009/03/java-version-of-amazon-ad-link-code-creator/"\"http://images.amazon.com/images/P/" +
					isbn + ".01.MZZZZZZZ.jpg\"" + " alt=" + "\"" + title + "\"" +
					" title=" + "\"" + title + "\"" + " style="
					+ "\"border:0; margin:0px\"" + " /></a>" + "\n\n" + desc);
				}
		}
	} //end Submit button event

	public static void main(String[] args)
	{
		AmazonAdLinkGenerator ad = new AmazonAdLinkGenerator();
	} // end main

} // end class