Consider the following codeArrayList<String> shapes = new ArrayList<String>(); Iterator<String> shapesIterator = shapes.iterator();Which of the following is not true?a.shapes is an ArrayList of Stringsb.shapesIterator is an iterator object belonging to shapesc.the next() method is used to check if there are any more objects in the shapes collectiond.the remove() method can be used to delete an object from the shapes collectione.all of the above are true
Question
Consider the following codeArrayList<String> shapes = new ArrayList<String>(); Iterator<String> shapesIterator = shapes.iterator();Which of the following is not true?a.shapes is an ArrayList of Stringsb.shapesIterator is an iterator object belonging to shapesc.the next() method is used to check if there are any more objects in the shapes collectiond.the remove() method can be used to delete an object from the shapes collectione.all of the above are true
Solution
The statement that is not true is:
c. the next() method is used to check if there are any more objects in the shapes collection
Explanation:
a. This is true. The code ArrayList<String> shapes = new ArrayList<String>(); is creating an ArrayList of Strings.
b. This is true. The code Iterator<String> shapesIterator = shapes.iterator(); is creating an iterator object for the shapes ArrayList.
c. This is false. The next() method is used to retrieve the next object in the collection, not to check if there are any more objects. The hasNext() method is used to check if there are any more objects in the collection.
d. This is true. The remove() method can be used to delete an object from the shapes collection, but it should be noted that it is generally safer to do this via the iterator rather than directly on the collection to avoid ConcurrentModificationExceptions.
e. This is false because option c is false.
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