// CS102, U of C, Spring 2006
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.LinkedList;
import java.util.Random;
/* Note the following differences between this Applet and the Shuffler
* GUI we built in class:
* - this class extends the JApplet class
* - there are all the same GUI components here except for the JFrame mainFrame
* - what happened in the GUI constructor now happens in init()
* - rather than add the mainPanel to the mainFrame, we add it to "this"
* - there is no constructor
* - there is no main method
*
* Please note however that in "all the ways that count" this applet is just
* the same as the standalone GUI.
*
* To include this applet on a web page, put the compiled file ShufflerApplet.class
* in the same directory as the following web page:
* ...
*
*
*/
public class ShufflerApplet extends JApplet implements ActionListener {
// GUI components
private JButton enterButton;
private JButton shuffleButton;
private JButton resetButton;
private JTextField tf;
private JLabel names;
private JPanel subPanel;
private JPanel mainPanel;
// logical
private LinkedList ss;
public void init() {
ss = new LinkedList();
enterButton = new JButton();
enterButton.setText("Enter");
enterButton.addActionListener(this);
shuffleButton = new JButton();
shuffleButton.setText("Shuffle");
shuffleButton.addActionListener(this);
resetButton = new JButton();
resetButton.setText("Reset");
resetButton.addActionListener(this);
tf = new JTextField();
names = new JLabel();
names.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
subPanel = new JPanel(new GridLayout(4,1));
subPanel.add(tf);
subPanel.add(enterButton);
subPanel.add(shuffleButton);
subPanel.add(resetButton);
mainPanel = new JPanel(new GridLayout(1,2));
mainPanel.add(subPanel);
mainPanel.add(names);
this.add(mainPanel);
}
public void actionPerformed(ActionEvent e) {
if (e.getSource() == enterButton) {
String s = tf.getText();
if (s.length() > 0)
ss.add(s);
tf.setText("");
} else if (e.getSource() == shuffleButton) {
Random r = new Random(System.currentTimeMillis());
int size = ss.size();
for (int i=0; i();
}
String d = "";
for (String s : ss)
d += s + "
";
d += "";
names.setText(d);
}
}