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

/*****************************************************
 *Class to demonstrate placing a label on a text field.
 *****************************************************/
public class LabelDemo extends JFrame implements ActionListener
{
    public static final int WIDTH = 300;
    public static final int HEIGHT = 200;

    private JTextField name;

    public LabelDemo()
    {
        setTitle("Name Tester");
        setSize(WIDTH, HEIGHT);
        addWindowListener(new WindowDestroyer());
        Container content = getContentPane();
        content.setLayout(new GridLayout(2, 1));

        JPanel namePanel = new JPanel();
        namePanel.setLayout(new BorderLayout());
        namePanel.setBackground(Color.lightGray);

        name = new JTextField(20);
        namePanel.add(name, BorderLayout.SOUTH);
        JLabel nameLabel = new JLabel("Enter your name here:");
        namePanel.add(nameLabel, BorderLayout.CENTER);

        content.add(namePanel);

        JPanel buttonPanel = new JPanel();
        buttonPanel.setLayout(new FlowLayout());
        JButton b = new JButton("Test");
        b.addActionListener(this);
        buttonPanel.add(b);
        b = new JButton("Clear");
        b.addActionListener(this);
        buttonPanel.add(b);

        content.add(buttonPanel);
    }

    public void actionPerformed(ActionEvent e)
    {
        if (e.getActionCommand().equals("Test"))
            name.setText("A very good name!");
        else if (e.getActionCommand().equals("Clear"))
            name.setText("");
        else
            name.setText("Error in window interface.");
    }

    public static void main(String[] args)
    {
        LabelDemo w = new LabelDemo();
        w.setVisible(true);
    }
 }