Re: a question about alias of reference

Person tom = new Person("Tom");

Person tim = new Person("Tim");

List<Person> peopleList = new ArrayList<Person>();

peopleList.add(tom);
peopleList.add(tim);

for(Person p : peopleList)
{
if(p.getName().equalsIgnoreCase("Tom"))
{
p = null;
}
}

now, I expect the reference tom will be null, but it is not. Why? I
thought the reference p is just an alias of reference tom. Both are
pointing to the same object. Setting p to null equals to setting tom to
null.