### Question:
Coord implements Localizable { @Override public int hashCode() { final int prime = 31; int result = 1; long temp; temp = Double.doubleToLongBits(x); result = prime * result + (int) (temp ^ temp >>> 32); temp = Double.doubleToLongBits(y); result = prime * result + (int) (temp ^ temp >>> 32); return result; } Coord();  Coord(double x, double y); void translate(double vx, double vy); void set(double x, double y); void setX(double x); void setY(double y); @Override double getX(); @Override double getY(); @Override int hashCode(); @Override boolean equals(Object object); @Override String toString();  }### Answer:
@Test void testHashCode() { assertHashEquals(new Coord(), new Coord()); assertHashEquals(new Coord(1.5, 2.5), new Coord(1.5, 2.5)); assertHashNotEquals(new Coord(), new Object()); assertHashNotEquals(new Coord(1.0, 0.0), new Coord(1.0, 1.0)); assertHashNotEquals(new Coord(0.0, 1.0), new Coord(1.0, 0.0)); assertHashNotEquals(new Coord(), new Coord(1.0, 1.0)); }