Need Major Quick Help on Bubble Sort

Question

I am trying to sort by year of birth and I enter it in as 1978, 1965, and 1947. All i want it to do is sort it to be 1947, 1965, 1978 yet it does 1965, 1947, 1978....any clues? it is the sortArray() method below. please respond immediately, i am trying to get this project done so i can go to bed to hand it in tomorrw, it's been bugging me for a week now and i just cant solve it
* A Database is a collection of persons (staff, student and faculty).
* A very simple database of people in a university. This class simply stores
* persons in an ArrayList and, at request, lists them on standard output.
* A first look at arrays.
* @author: Keitha Murray, James Devlin
* @version: January 2002, February 2002
public class Database
Person[] peopleArray = new Person[50];
Person[] tempArray = new Person[50];
int i;
int lastpos;
int nextpos;
* Create a new, empty person database.
public Database()
lastpos = 0;
nextpos = 0;
lastpos = nextpos - 1;
i = 0;
* Add a person to the database.
* @param aPerson the person to add
public void addPerson(Person aPerson)
peopleArray[nextpos] = aPerson;
lastpos = nextpos;
nextpos++;
* List all the persons currently in the database on standard out.
public void listAll()
for (int i = 0; i < nextpos; i++)
System.out.println(peopleArray.toString());
public void sortArray()
for (int j = 0; j < lastpos; j++)
for(int i = 0; i < lastpos; i++)
if (peopleArray[i].getYearOfBirth() > peopleArray[i + 1].getYearOfBirth())
tempArray[i] = peopleArray[i];
peopleArray[i] = peopleArray[i + 1];
peopleArray[i + 1] = tempArray[i];
lastpos--;
public void removeElement(String name)
int i = 0, position = -1;
int count;
boolean found = false;
while(i < nextpos && !found)
if (peopleArray[i].getName().equals(name))
position = i;
found = true;
i++;
count = i;
for (i = count; i < count - 1; i++)
peopleArray[i] = peopleArray[i + 1];

Answer 1

Hmm...
It still fails to compile for me, giving 5 exceptions. I get a compile-time exception for every time you try to use "peopleArray" as an element of the array (line #'s 48, 51, 52, 68, and 81). They look like this:
Database.java:81: incompatible types
found : Database.Person
required: Database.Person[]
peopleArray = peopleArray[i + 1];
, and:
Database.java:68: cannot resolve symbol
symbol : method getName ()
location: class Database.Person[]
if (peopleArray.getName().equals(name))
When I changed your sortArray() method as below the method performed properly:
public void sortArray()
  for (int j = 0; j < lastpos; j++)
    for(int i = 0; i < lastpos; i++)
      if (peopleArray[ i].getYearOfBirth() > peopleArray[i + 1].getYearOfBirth())
        Person temp = peopleArray[ i];
        peopleArray[ i] = peopleArray[i + 1];
        peopleArray[i + 1] = temp;
}The only differences are that all "peopleArray" references have been replaced by "peopleArray[ i]" and I removed the decrement statement.