### Question:
Point { @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + x; result = prime * result + y; return result; } Point();  Point(int x, int y); void translate(int vx, int vy); void set(int x, int y); void setX(int x); void setY(int y); int getX(); int getY(); @Override int hashCode(); @Override boolean equals(Object object); @Override String toString();  }### Answer:
@Test void testHashCode() { assertEquals(new Point(1, 2), new Point(1, 2)); assertHashNotEquals(new Point(), new Object()); assertHashNotEquals(new Point(1, 0), new Point(1, 1)); assertHashNotEquals(new Point(0, 1), new Point(1, 0)); assertHashNotEquals(new Point(), new Point(1, 1)); }