If the EventHandler can't find a method with the specified name passed, and you don't pass in a property name, you'll get an ArrayIndexOfBoundsException instead of an error indicating the method couldn't be found:

import javax.swing.event.*;
import javax.swing.*;
import java.beans.*;

public class Test {
    public static void main(String argv[]) {
        new Test();
    }

    public Test() {
        JTree tree = new JTree();
        tree.addTreeSelectionListener((TreeSelectionListener)EventHandler.
             create(TreeSelectionListener.class, this, "selectionChanged"));
        tree.setSelectionRow(0);
    }
}