Array vs ArrayList Comparison

These flashcards cover key concepts related to Arrays and ArrayLists, including methods, properties, and comparisons, to assist in understanding their use and differences.

What method is used to add an element to a specific index in a list?

list.add(index, element);

What symbols are used in an ArrayList?

<> (angle brackets)

What types of data can be used in an Array?

Primitive data types (int, double, etc.) and Objects (including String)

What types of data can be used in an ArrayList?

Objects ONLY (Wrapper classes like Integer, Double, Character)

What method can be used to get the length of an ArrayList?

.size();

What property can be used to get the length of an Array?

.length

Which method is used to convert an Array to a String representation?

Arrays.toString(arrayName);

Which method is used to convert an ArrayList to a String representation?

.toString();

True or False: An Array can only be a fixed size.

True

True or False: An ArrayList can only be a fixed size.

False

True or False: An Array uses the wrapper class.

False

What collection is used when you need a fixed size, high performance data structure, especially for primitives?

Array

What collection is used when working with objects that need flexibility and dynamic resizing?

ArrayList

What is the term for looping through lists of data and performing an action with each item?

Traversing

Which loop is used to directly loop through each item in a list?

For Each Loop

What is NOT a drawback of a For Each loop?

Can’t loop through each item in a list of items.

Provide an example of a For Each loop.

for(int num : nums){ System.out.println("Number: " + num); }

What is the correct way to use the .remove() method?

schoolSupplies.remove(pencil);

What error will occur with the line 'schoolSubjects.add('Science');'?

Single quotes represent char, not String.