Prentice.Hall.Introduction.to.Java.Programming,.Brief.Version.9th.(2014).[sharethefiles.com]

13 private JCheckBox jchkEditable = new JCheckBox();
14
15 // Create two buttons
16 private JButton jbtAdd =
17 new JButton("Add a Child for Selected Node");
18 private JButton jbtRemove = new JButton("Remove Selected Nodes");
19
20 // Declare two trees
21 private JTree jTree1, jTree2;
22
23 public ModifyTree() {
24 // Create the first tree
25 DefaultMutableTreeNode root, europe, northAmerica, us;
26
27 europe = new DefaultMutableTreeNode("Europe");
28 europe.add(new DefaultMutableTreeNode("UK"));
29 europe.add(new DefaultMutableTreeNode("Germany"));
30 europe.add(new DefaultMutableTreeNode("France"));
31 europe.add(new DefaultMutableTreeNode("Norway"));
32
33 northAmerica = new DefaultMutableTreeNode("North America");
34 us = new DefaultMutableTreeNode("US");
35 us.add(new DefaultMutableTreeNode("California"));
36 us.add(new DefaultMutableTreeNode("Texas"));
37 us.add(new DefaultMutableTreeNode("New York"));
38 us.add(new DefaultMutableTreeNode("Florida"));
39 us.add(new DefaultMutableTreeNode("Illinois"));
40 northAmerica.add(us);
41 northAmerica.add(new DefaultMutableTreeNode("Canada"));
42
43 root = new DefaultMutableTreeNode("World");
44 root.add(europe);
45 root.add(northAmerica);
46
47 jcboSelectionMode.setSelectedIndex(1);
48
49 JPanel p1 = new JPanel();
50 p1.add(new JLabel("selectionMode"));
51 p1.add(jcboSelectionMode);
52 p1.add(new JLabel("editable"));
53 p1.add(jchkEditable);
54
55 JPanel p2 = new JPanel(new GridLayout(1, 2));
56 p2.add(new JScrollPane(jTree1 = new JTree(root)));
57 p2.add(new JScrollPane(jTree2 =
58 new JTree(new DefaultTreeModel(root)))); // Same root as jTree1
59
60 JPanel p3 = new JPanel();
61 p3.add(jbtAdd);
62 p3.add(jbtRemove);
63
64 add(p1, BorderLayout.NORTH);
65 add(p2, BorderLayout.CENTER);
66 add(p3, BorderLayout.SOUTH);
67
68 // Register listeners
69 jcboSelectionMode.addActionListener(new ActionListener() {
70 @Override
71 public void actionPerformed(ActionEvent e) {
72 if (jcboSelectionMode.getSelectedItem().
73 equals("CONTIGUOUS_TREE_SELECTION"))
74 jTree1.getSelectionModel().setSelectionMode(
75 TreeSelectionModel.CONTIGUOUS_TREE_SELECTION);
76 else if (jcboSelectionMode.getSelectedItem().
77 equals("DISCONTIGUOUS_TREE_SELECTION"))
78 jTree1.getSelectionModel().setSelectionMode(
46