Java Swing - 如何從ArrayList創(chuàng)建JTree

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import java.awt.BorderLayout;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.event.TreeModelListener;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
public class Main {
  public static void main(String[] args) {
    JTree tree = new JTree(new TestModel());
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setLayout(new BorderLayout());
    frame.add(new JScrollPane(tree));
    frame.pack();
    frame.setVisible(true);
  }
}
class TestModel implements TreeModel {
  Element data;
  TestModel() {
    data = new Element("data");
    data.add(new Element("One"));
    data.add(new Element("Two"));
 
 
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