import java.awt.*;import java.awt.event.*;import javax.swing.*;public class TestCompletableJTextField extends JPanel    implements ActionListener {    CompletableJTextField completableField;    JTextField completionField;    public TestCompletableJTextField () {        super();        setLayout (new BoxLayout (this, BoxLayout.Y_AXIS));        completableField = new CompletableJTextField (75);        add (completableField);        JPanel bottom = new JPanel ();        bottom.add (new JLabel ("Completion:"));        completionField = new JTextField (40);        completionField.addActionListener (this);        bottom.add (completionField);        JButton addButton = new JButton ("Add");        addButton.addActionListener (this);        bottom.add (addButton);        add (bottom);    }    public void actionPerformed (ActionEvent e) {        completableField.addCompletion (completionField.getText());        completionField.setText ("");    }    public static void main (String[] main) {        JFrame f = new JFrame ("Completions...");        f.getContentPane().add (new TestCompletableJTextField());        f.pack();        f.setVisible (true);    }}