import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
/**
 * Framework or outline of problem described on:
 * http://www.-ib-computing.com/java/arrays/objectArrays.html
 *
 * @author Mr J wrote the outline
 * @version 1.0
 */
public class XandShuffle extends Applet implements ActionListener
{
	// arrays of text fields and Labels
	static final int MAX = 6;
	private TextField[] tfNames = new TextField[MAX]; 
	private TextField[] tfScores = new TextField[MAX]; 
	private Label[] lbNumbers = new Label[MAX]; 
	
	private Label lbTitle = new Label("Array problem");
	private Label lbScores = new Label ("Scores:");
	private Label lbNames = new Label ("Names:");
	private Button eliminate = new Button("Eliminate!");
	private Button shuffle = new Button("Shuffle");	
	private Label messages = new Label("System messages will appear here");

    // data arrays
    private int scores[] = new int[] { 5, 55, 32, 90, 80, 49};
    private String names[] = new String[] {"Jimbo", "Jumbo", "Mumbo", 
                                           "Mambo", "Hambo", "Himbo"};
	/** 
	 * Initialize and objects to the Applet
	 */
	public void init()
	{
	    // Panel with name labels
	    Panel label = new Panel();
	    label.setLayout(new GridLayout(3,1));
	    label.add(lbTitle);
	    label.add(lbScores);
	    label.add(lbNames);
	    // Panel with score and name boxes
	    Panel main = new Panel();
	    main.setLayout(new GridLayout(3,6));
	    for(int x = 0; x < MAX; x++)
	    {
	        tfScores[x] = new TextField(10);
	        tfNames[x] = new TextField(10);
	        lbNumbers[x] = new Label("" + x + ".");
	        main.add(lbNumbers[x]);
	    }
	    for(int x = 0; x < MAX; x++)
	    {
	        main.add(tfScores[x]);
	    }
	    for(int x = 0; x < MAX; x++)
	    {
	        main.add(tfNames[x]);
	    }
        add(label);
        add(main);
        add(eliminate);
        add(shuffle);
        add(messages);
        // Causes button presses to be detected
        eliminate.addActionListener(this);
        shuffle.addActionListener(this);
        
        // initialise display
        updateDisplay(scores, names);
	}
	/** 
	 * 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)
	{
	    // sample action...
	    messages.setText("OK, let's solve this problem!");
	}
	/** 
	 * Put values from arrays in display TextFields
	 * 
	 * @param scores the int array of scores
	 * @param names a String array of names
	 */
	private void updateDisplay(int[] scores, String[] names)
	{
	    for(int x = 0; x < MAX; x++)
	    {
	        tfScores[x].setText("" + scores[x]);
	        tfNames[x].setText(names[x]);
	    }
	}
	/** 
	 * read values into arrays from TextFields
	 * This is useful if you want to test your algorithms with
	 * other sets of data...
	 * 
	 * @param text field array of scores
	 * @param text field array of names
	 */
	private void readDisplay(TextField[] tfS, TextField[] tfN)
	{
	    for(int x = 0; x < MAX; x++)
	    {
	        scores[x] = Integer.parseInt(tfS[x].getText().trim());
	        names[x] = tfN[x].getText().trim();
	    }
	}	
}