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import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
public class TreeExample {
public static void main(String args[]) {
JFrame frame = new JFrame("Tree");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JTree tree = new JTree();
JScrollPane pane = new JScrollPane(tree);
frame.getContentPane().add(pane);
frame.setSize(250, 250);
frame.show();
}
}
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