public class MemoGUI extends JFrame implements ActionListener
1: import javax.swing.JFrame;
2: import javax.swing.JMenu;
3: import javax.swing.JMenuBar;
4: import javax.swing.JMenuItem;
5: import javax.swing.JPanel;
6: import javax.swing.JTextArea;
7: import java.awt.Color;
8: import java.awt.Container;
9: import java.awt.BorderLayout;
10: import java.awt.event.ActionEvent;
11: import java.awt.event.ActionListener;
12:
13: public class MemoGUI extends JFrame implements ActionListener
14: {
15: public static final int WIDTH = 600;
16: public static final int HEIGHT = 300;
17: public static final int LINES = 10;
18: public static final int CHAR_PER_LINE = 40;
19:
20: private JTextArea theText;
21: private String memo1 = "No Memo 1.";
22: private String memo2 = "No Memo 2.";
23:
24: public MemoGUI( )
25: {
26: setSize(WIDTH, HEIGHT);
27: addWindowListener(new WindowDestroyer( ));
28: setTitle("Memo Saver");
29: Container contentPane = getContentPane( );
30: contentPane.setLayout(new BorderLayout( ));
31:
32: JMenu memoMenu = new JMenu("Memos");
33: JMenuItem m;
34:
35: m = new JMenuItem("Save Memo 1");
36: m.addActionListener(this);
37: memoMenu.add(m);
38:
39: m = new JMenuItem("Save Memo 2");
40: m.addActionListener(this);
41: memoMenu.add(m);
42:
43: m = new JMenuItem("Get Memo 1");
44: m.addActionListener(this);
45: memoMenu.add(m);
46:
47: m = new JMenuItem("Get Memo 2");
48: m.addActionListener(this);
49: memoMenu.add(m);
50:
51: m = new JMenuItem("Clear");
52: m.addActionListener(this);
53: memoMenu.add(m);
54:
55: m = new JMenuItem("Exit");
56: m.addActionListener(this);
57: memoMenu.add(m);
58:
59: JMenuBar mBar = new JMenuBar( );
60: mBar.add(memoMenu);
61: setJMenuBar(mBar);
62:
63: JPanel textPanel = new JPanel( );
64: textPanel.setBackground(Color.BLUE);
65: theText = new JTextArea(LINES, CHAR_PER_LINE);
66: theText.setBackground(Color.WHITE);
67: textPanel.add(theText);
68: contentPane.add(textPanel, BorderLayout.CENTER);
69: }
70:
71: public void actionPerformed(ActionEvent e)
72: {
73: String actionCommand = e.getActionCommand( );
74: if (actionCommand.equals("Save Memo 1"))
75: memo1 = theText.getText( );
76: else if (actionCommand.equals("Save Memo 2"))
77: memo2 = theText.getText( );
78: else if (actionCommand.equals("Clear"))
79: theText.setText("");
80: else if (actionCommand.equals("Get Memo 1"))
81: theText.setText(memo1);
82: else if (actionCommand.equals("Get Memo 2"))
83: theText.setText(memo2);
84: else if (actionCommand.equals("Exit"))
85: System.exit(0);
86: else
87: theText.setText("Error in memo interface");
88: }
89:
90: public static void main(String[] args)
91: {
92: MemoGUI gui = new MemoGUI( );
93: gui.setVisible(true);
94: }
95: }
96: