why is the array giving an error?

Question

why is here: arrayList = {firstName, lastName, ID, examValue, score}; gives an error?? The method should call a constructor which is Exam(String firstName, String lastName, int ID, String examType, int score), so what's is wrong with this method? Thanks in advance!

public static Exam[] readAllExams(Scanner s)
    {
        Exam[] arrayList = null;
        String firstName = "";
        String lastName = "";
        int ID = 0;
        String examValue = "";
        int score = 0;

        while(s.hasNext())
        {
            if(s.hasNextLine())
            {
                firstName = s.next();
                lastName = s.next();
            }
            else if(s.hasNextInt())
            {
                ID = s.nextInt();
            }
            else if (s.hasNextLine())
            {
                examValue = s.nextLine();
            }
            else if (s.hasNextInt())
            {
                score = s.nextInt();
            }

        }

        arrayList = {firstName, lastName, ID, examValue, score};
        return arrayList;


    }

You can't initialize an array that way after the declaration. See http://stackoverflow.com/questions/5387643/array-initialization-syntax-when-not-in-a-declaration — , Feb 09 '15 at 18:36

score 0 · Accepted Answer · answered Feb 09 '15 at 18:37

0

Firstly, you cannot initialize an array as Exam[] arrayList = null; and then reassign the value to an array of length 5.

Secondly, your ArrayList is a List of different objects and primitives (String, int), and does not match the specified type Exam[].

Either change the type of objects assigned to the Exam list, or make sure all of the objects in the list are of type Exam.

answered Feb 09 '15 at 18:37

rageandqq

2,221
18
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how can all of the objects be of type Exam? Could please provide any examples of all of the objects of type Exam? @rageandqq – jordan Feb 09 '15 at 20:05
You would have to make sure all of the objects in the list (`firstName, lastName, ID, examValue, score`) are of type Exam and not what they currently are (string, int, etc). That, or change `arrayList` to accept different types (have it just as an ArrayList` type and not an array of `Exam` objects). – rageandqq Feb 09 '15 at 20:22

score 0 · Answer 2 · answered Feb 09 '15 at 18:39

0

You can try using arrayList = new Exam[]{ /* stuff */ }. The syntaxis you tried to use is valid only in an array declaration.

Also, you can't initialize an array of type Exam with variables of different basic types.

answered Feb 09 '15 at 18:39

I'm new to objects, Could you please provide any examples using objects in an array @Mints97 ? – jordan Feb 09 '15 at 20:09

score 0 · Answer 3 · answered Feb 09 '15 at 18:40

0

Here Exam[] arrayList = null; you say array is of type Exam then you say arrayList = {firstName, lastName, ID, examValue, score}; array is of type String that 2 statements contradict each other

answered Feb 09 '15 at 18:40

singhakash

7,891
6
31
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why is the array giving an error?

3 Answers3