### Question:
PrimitiveIntWrapper extends IntegerWrapper { @Override public Integer getDefault() { return defaultValue; } PrimitiveIntWrapper();  PrimitiveIntWrapper(int value); @Override void set(Number v); @Override Integer getDefault(); @Override boolean isPrimitiveWrapper(); @Override R accept(WrapperVisitor<R, P, Q, TH> visitor, P p, Q q);  }### Answer:
@Test void getDefault() { PrimitiveIntWrapper wrapper = new PrimitiveIntWrapper(); assertEquals(0, wrapper.getDefault()); }