Fill in the blank to declare the ArrayList to hold the correct type. 1 point<int><char><Char>[int]<Integer>[Integer]
Question
Fill in the blank to declare the ArrayList to hold the correct type.
1 point
<int> <char> <Char> [int] [Integer] [Integer]
Solution
Break Down the Problem
- The problem requires us to fill in the blank with the correct declaration for an
ArrayList. - We need to identify which type the
ArrayListshould hold based on the options provided.
Relevant Concepts
- An
ArrayListin Java is a resizable array implementation of the List interface. - The correct type for an
ArrayListshould be specified using angle brackets<>.
Analysis and Detail
- The valid options provided are
int,char,Char,Integer,[int], and[Integer]. - In Java, primitive types such as
intandcharcannot be used directly withArrayList. Instead, we use their wrapper classes.Integeris the wrapper class forint.Characteris the wrapper class forchar.
- Both
IntegerandCharactercan be used withArrayList.
Verify and Summarize
After analyzing the provided options:
- Although
Charis mentioned, it is not a valid type for anArrayList. - The other remaining option is
Integer, which is valid for theArrayListdeclaration.
Final Answer
ArrayList<Integer> myList = new ArrayList<>();
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