How To Store ResultSet To Other Data Structures

I have a java query like this

query ="Select major_career.Major_Title, career.ISCOTitle,career.FS.... " //only partial,
// I swear the query is correct
resultSet = statement.executeQuery(query); //this executes it
relArr = new ArrayList<String>(); //don't worry it is intialized

In the code below I tried to store the resultset components into the arraylist

int j = 1;
while (resultSet.next()) {
while(j<=numberOfColumns){
relArr.add(resultSet.getObject(j).toString());
j++;
}
} // end while

I am not sure whether the arraylist is able to store the result set because when i try to display it like show below it only shows some rows and only the first column

Iterator it = relArr.iterator();
while (it.hasNext())
{
System.out.println(it.next());

I want to manipulate the resultset results in my program by copying the resultset values to other datastructures.