### Question:
NumericPrediction extends Prediction { @Override public boolean equals(Object o) { if (!(o instanceof NumericPrediction)) { return false; } NumericPrediction other = (NumericPrediction) o; return prediction == other.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 testEquals() { NumericPrediction prediction = new NumericPrediction(1.5, 1); NumericPrediction prediction1 = new NumericPrediction(1.5, 2); assertEquals(prediction, prediction1); prediction1.update(2.0, 2); assertNotEquals(prediction, prediction1); prediction1.update(1.5, 4); assertNotEquals(prediction, prediction1); }