Java JTree:如何获取一片叶子的文本?
我想以以下格式获取JTree的文本:Java JTree:如何获取一片叶子的文本?,java,swing,jtree,Java,Swing,Jtree,我想以以下格式获取JTree的文本: 根 节点1 叶1 leaf2这里有一个简单的例子: import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JScrollPane; import javax.swing.JTree; import javax.swing.event.TreeSelectionEvent; import javax.swing.event.TreeSelectionListener;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
public class TestFrame extends JFrame {
private JLabel lbl;
private JTree tree;
public TestFrame() {
init();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack();
setLocationRelativeTo(null);
setVisible(true);
}
private void init() {
tree = new JTree();
tree.getSelectionModel().addTreeSelectionListener(getListener());
lbl = new JLabel("empty");
add(new JScrollPane(tree));
add(lbl,BorderLayout.EAST);
}
private TreeSelectionListener getListener() {
return new TreeSelectionListener() {
@Override
public void valueChanged(TreeSelectionEvent e) {
DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
lbl.setText(node == null ? "empty" : node.toString());
}
};
}
public static void main(String args[]) {
new TestFrame();
}
}
阅读更多信息。将a添加到JTree
,当所选节点更改时,它将发出通知,您可以使用从中提取事件的详细信息。请仔细查看以了解更多详细信息