dog.java

//Java pass-by-value
public void foo(Dog d) {
  d.getName().equals("Max"); // true
  d = new Dog("Fifi");
  d.getName().equals("Fifi"); // true
}

Dog aDog = new Dog("Max");
foo(aDog);
aDog.getName().equals("Max"); // true

//C++ corresponding (pass d reference by value)
public void foo(Dog &d) {
  //d still points to a *Dog pointer
  d->getName() == "Max"; //true
  d = new Dog("Fifi");
  d->getname() == "Fifi"; //true
}

Dog *aDog = new Dog("Max");
foo(&aDog);
aDog->getName() == "Max"; //true