Version 7 of the Clay Shell program is like the sixth version except that the center Button object is replaced by a TextArea object.

Demos

java -jar ".../Clay7.jar" -w 400 -h 200

Code

package clay7;

import java.awt.*;
import java.awt.event.*;

public class Main {
    
    <<<Just like in the previous version!>>>

}
class ClayFrame extends Frame implements ActionListener {
    
    public ClayFrame(String title, Color color, Dimension size) {

        <<<Just like in the previous version!>>>

    }
    
    private Color backgroundColor;
    private Color hilightColor;
    private Color lolightColor;

    private Button nb;
    private Button sb;
    private Button eb;
    private Button wb;
    private Button theButton;  // selection
    
    private TextArea ta;

    private void establishColors() {

   <<<Just like in the previous version!>>>

    }

    private void addComponents() {
        // establish the layout manager
        setLayout(new BorderLayout());
        // create five buttons
        nb = new Button("North");
        sb = new Button("South");
        eb = new Button("East");
        wb = new Button("West");
        // create a text area
        ta = new TextArea();
        // set backgrounds of buttons to white
        nb.setBackground(lolightColor);
        sb.setBackground(lolightColor);
        eb.setBackground(lolightColor);
        wb.setBackground(lolightColor);
        ta.setBackground(Color.white);
        // add action listeners
        nb.addActionListener(this);
        sb.addActionListener(this);
        eb.addActionListener(this);
        wb.addActionListener(this);
        // add the buttons to the frame
        add(nb,BorderLayout.NORTH);
        add(sb,BorderLayout.SOUTH);
        add(ta,BorderLayout.CENTER);
        add(eb,BorderLayout.EAST);
        add(wb,BorderLayout.WEST);
    }
    
    public void actionPerformed(ActionEvent event) {
        Object source = event.getSource();
        if ( source instanceof Button ) {
            theButton = (Button)source;
            String theLabel = theButton.getLabel();
            ta.append(theLabel + "\n");
            // color the buttons
            nb.setBackground(lolightColor);
            sb.setBackground(lolightColor);
            wb.setBackground(lolightColor);
            eb.setBackground(lolightColor);
            theButton.setBackground(hilightColor);
        }
    }


    class CloseWindow extends WindowAdapter {

        <<<Just like in the previous version!>>>

    }

}

Questions

1. What is different between this version of the program and the previous one. (Identify all the differences in the code.)
2. What is a text area?
3. What functionality is associated with text area?