### Question:
FloatWrapper extends AbstractWrapper<Float> implements NumberWrapper<Float> { @Override public void increment() { Float value = doGet(); if (value != null) { doSet(value + 1f); } } FloatWrapper();  FloatWrapper(Float value); @Override void set(Number v); @Override void increment(); @Override void decrement(); @Override R accept(WrapperVisitor<R, P, Q, TH> visitor, P p, Q q);  }### Answer:
@Test public void testIncrement() { FloatWrapper wrapper = new FloatWrapper(10f); wrapper.increment(); assertEquals(new Float(11f), wrapper.get()); }