{
DefaultTableModel tm = new DefaultTableModel(new String[] {"AA", "BB", "CC"}, 3);
JTable t = new JTable(tm);
JTableHeader th = t.getTableHeader();
AccessibleContext ac = th.getAccessibleContext();
Accessible ac0 = ac.getAccessibleChild(0);
harness.check(ac0.getClass().getName().endsWith("AccessibleJTableHeaderEntry"));
AccessibleContext ac0ac = ac0.getAccessibleContext();
harness.check(ac0ac.getAccessibleChild(0), null);
harness.check(ac0ac.getAccessibleChild(-1), null);
harness.check(ac0ac.getAccessibleChild(99), null);
}