### Question:
NumericPrediction extends Prediction { @Override public int hashCode() { return Double.hashCode(prediction); } NumericPrediction(double prediction, int initialCount); double getPrediction(); @Override FeatureType getFeatureType(); @Override void update(Example train); synchronized void update(double newPrediction, int newCount); @Override boolean equals(Object o); @Override int hashCode(); @Override String toString();  }### Answer:
@Test public void testHashCode() { NumericPrediction prediction = new NumericPrediction(1.5, 1); assertEquals(1073217536, prediction.hashCode()); prediction.update(2.0, 2); assertEquals(1789394944, prediction.hashCode()); }