import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
/**
 * Take a Strin from the user and reverse it using a stack
 *
 * @author Mr J
 * @version 20050211
 */
public class ReverseMe extends Applet implements ActionListener
{
	// sample awt objects
	private TextField name = new TextField("Type text here!");
	private Button pressMe = new Button("Reverse me!");
	private Label greeting = new Label("The message will appear here");
	// Data members
	CharacterStack stack = new CharacterStack();

	/** 
	 * Add objects to the Applet
	 */
	public void init()
	{
        add(name);
        add(pressMe);
        add(greeting);
        // Causes button presses to be detected
        pressMe.addActionListener(this);
	}
	/** 
	 * When an event occurs on an object with an ActionListener attached, this
	 * method is carried out.  
	 * 
	 * @param e carries details about the event that occurred
	 */
    public void actionPerformed(ActionEvent e)
	{
      // push each character on to the stack
      String text = name.getText();
      for (int p = 0; p < text.length(); p++)
      {
        stack.push(text.charAt(p));
      } 
      //  pop each one off and add to String
      String reverse = "";
      while (!stack.isEmpty())
      {
        reverse = reverse + stack.pop();
      }
      greeting.setText(reverse);
	}
}