Java Swing - 如何將子節(jié)點(diǎn)從對(duì)象添加到JTree
我們想知道如何將子節(jié)點(diǎn)從對(duì)象添加到JTree。
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
public class Main {
public static void main(String[] args) {
DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
DefaultTreeModel model = new DefaultTreeModel(root);
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(new JScrollPane(new JTree(model)));
f.getContentPane().add(
new JButton(new AbstractAction("Add thousand children") {
@Override
public void actionPerformed(ActionEvent e) {
int offset = root.getChildCount() + 1;
for (int i = 0; i < 1000; i++) {
DefaultMutableTreeNode child = new DefaultMutableTreeNode(
"Person " + (i + offset));
// model.insertNodeInto(child, root, root.getChildCount());
root.add(child);
}
model.nodeStructureChanged(root);
}
}), BorderLayout.PAGE_END);
f.pack();
f.setVisible(true);
}
}
【jtree】
