### Question:
StandardBarPainter implements BarPainter, Serializable { @Override public int hashCode() { int hash = 37; return hash; } StandardBarPainter(); @Override void paintBar(Graphics2D g2, BarRenderer renderer, int row,
            int column, RectangularShape bar, RectangleEdge base); @Override void paintBarShadow(Graphics2D g2, BarRenderer renderer, int row,
            int column, RectangularShape bar, RectangleEdge base,
            boolean pegShadow); @Override boolean equals(Object obj); @Override int hashCode();  }### Answer:
@Test public void testHashcode() { StandardBarPainter p1 = new StandardBarPainter(); StandardBarPainter p2 = new StandardBarPainter(); assertEquals(p1, p2); int h1 = p1.hashCode(); int h2 = p2.hashCode(); assertEquals(h1, h2); }