As you can see I have a StaffMember class and trying to make a list of StaffMember objects, but when I go to get them out of the list I get errors. What could be causing this (Or java lists are different from other languages).
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2 Answers
Since you're not using a generic List variable, the compiler has no way of knowing what type of objects the List contains, and so you'll have to cast the object returned by the get(...) method to the type you believe it to be.
A better solution is to declare your list variable to be a generic List<StaffMember>.
public class StaffList {
private List<StaffMember> list;
answered Nov 9, 2013 at 23:51
Hovercraft Full Of Eels
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3 Comments
isnot2bad
"Program to an 'interface', not an 'implementation'." (Gang of Four 1995:18)
Hovercraft Full Of Eels
@TristanCunningham: You can still use a
List variable and assign it an ArrayList object since the ArrayList class implements the List interface, and in fact this is the preferred way to do it.
Steve P.
@TristanCunningham While it's a better practice to use a List, you can switch
List<StaffMember> with ArrayList<StaffMember>.I think your life will be better if you do it this way:
public class Staff {
private List<StaffMember> roster;
public Staff() {
this.roster = new ArrayList<StaffMember>();
}
// add the rest
}
