### Question:
Weight implements java.io.Serializable, Cloneable { public final void dec(final double amount) { this.value -= amount; } Weight();  Weight(double value); final void inc(final double amount); final void dec(final double amount); final void setValue(double value); final double getValue(); @Override String toString(); @Deprecated void randomize(double min, double max); final T getTrainingData(); final void setTrainingData(T trainingData); @Override Object clone(); @Override int hashCode(); @Override boolean equals(Object obj); public double value; transient double weightChange; }### Answer:
@Test public void testDec() { System.out.println("dec"); double amount = 0.6; Weight instance = new Weight(1); instance.dec(amount); assertEquals(0.4, instance.value, 0); }