Я хочу сделать приложение, которое может искать JTREE, набрав буквы в текстовое поле. Я хочу, чтобы он отображал слова, которые соответствуют неполному вводу. Как будто он должен соответствовать узлу «образец», даже если пользователь напечатал только «SA». < /p>
Вот мой код. Это работает, но только для целых слов. Спасибо! < /P>
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Enumeration;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JTree;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.MutableTreeNode;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
public class SearchTree extends JFrame {
private DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root");
private DefaultTreeModel model = new DefaultTreeModel(root);
private JTree tree = new JTree(model);
private JLabel searchLabel = new JLabel("Enter Node to be searched");
private JTextField searchText;
public SearchTree() {
DefaultMutableTreeNode n1 = new DefaultMutableTreeNode("Sample 1");
n1.add(new DefaultMutableTreeNode("2nd level: Child l"));
n1.add(new DefaultMutableTreeNode("Search Me"));
n1.add(new DefaultMutableTreeNode("Bob"));
DefaultMutableTreeNode n2 = new DefaultMutableTreeNode("Find me");
n2.add(new DefaultMutableTreeNode("2nd level: Child 2"));
n2.add(new DefaultMutableTreeNode("Peter"));
n2.add(new DefaultMutableTreeNode("Lily"));
DefaultMutableTreeNode n3 = new DefaultMutableTreeNode("Explore me");
n3.add(new DefaultMutableTreeNode("Search Me Please"));
n3.add(new DefaultMutableTreeNode("Rome"));
n3.add(new DefaultMutableTreeNode("Italy"));
root.add(n1);
root.add(n2);
root.add(n3);
tree.setEditable(true);
tree.setSelectionRow(0);
JScrollPane scrollPane = new JScrollPane(tree);
getContentPane().add(scrollPane, BorderLayout.CENTER);
JPanel searchPanel = new JPanel();
searchPanel.setBorder(BorderFactory.createEtchedBorder());
searchText = new JTextField(20);
searchText.getDocument().addDocumentListener(new SearchListener());
searchPanel.add(searchText);
searchPanel.add(searchLabel);
getContentPane().add(searchPanel, BorderLayout.SOUTH);
setSize(700, 400);
setVisible(true);
}
public void removeNode(DefaultMutableTreeNode selNode) {
if (selNode == null) {
return;
}
MutableTreeNode parent = (MutableTreeNode) (selNode.getParent());
if (parent == null) {
return;
}
MutableTreeNode toBeSelNode = getSibling(selNode);
if (toBeSelNode == null) {
toBeSelNode = parent;
}
TreeNode[] nodes = model.getPathToRoot(toBeSelNode);
TreePath path = new TreePath(nodes);
tree.scrollPathToVisible(path);
tree.setSelectionPath(path);
model.removeNodeFromParent(selNode);
}
private MutableTreeNode getSibling(DefaultMutableTreeNode selNode) {
MutableTreeNode sibling = (MutableTreeNode) selNode
.getPreviousSibling();
if (sibling == null) {
sibling = (MutableTreeNode) selNode.getNextSibling();
}
return sibling;
}
private class SearchListener implements DocumentListener{
@Override
public void insertUpdate(DocumentEvent e) {
DefaultMutableTreeNode node = searchNode(searchText.getText());
if (node != null) {
TreeNode[] nodes =model.getPathToRoot(node);
TreePath path = new TreePath(nodes);
tree.scrollPathToVisible(path);
tree.setSelectionPath(path);
} else {
System.out.println("Node with string "
+ searchText.getText() + " not found");
}
}
@Override
public void removeUpdate(DocumentEvent e) {
DefaultMutableTreeNode node = searchNode(searchText.getText());
if (node != null) {
TreeNode[] nodes =model.getPathToRoot(node);
TreePath path = new TreePath(nodes);
tree.scrollPathToVisible(path);
tree.setSelectionPath(path);
} else {
System.out.println("Node with string "
+ searchText.getText() + " not found");
}
}
@Override
public void changedUpdate(DocumentEvent e) {
DefaultMutableTreeNode node = searchNode(searchText.getText());
if (node != null) {
TreeNode[] nodes =model.getPathToRoot(node);
TreePath path = new TreePath(nodes);
tree.scrollPathToVisible(path);
tree.setSelectionPath(path);
} else {
System.out.println("Node with string "
+ searchText.getText() + " not found");
}
}
public DefaultMutableTreeNode searchNode(String nodeStr) {
DefaultMutableTreeNode node = null;
Enumeration e = root.breadthFirstEnumeration();
while (e.hasMoreElements()) {
node = (DefaultMutableTreeNode) e.nextElement();
if (nodeStr.equals(node.getUserObject().toString())) {
return node;
}
}
return null;
}
}
public static void main(String[] arg) {
SearchTree st = new SearchTree();
}
}
Подробнее здесь: https://stackoverflow.com/questions/301 ... -node-name
