The Complete Java Developer Course: From Beginner to Master - ArrayLists

This video tutorial introduces Java arrays and ArrayLists, highlighting their differences and limitations. It explains how to create and use ArrayLists, including adding and retrieving elements. The tutorial also covers the limitations of using primitive types with ArrayLists and offers a challenge to use an enhanced for loop. The video concludes with a preview of upcoming topics that address these limitations.

What is a key limitation of arrays in Java?

• They have a fixed size and cannot grow dynamically.

• They can only store integers.

• They cannot store more than 10 elements.

• They can only be used in the main method.

Which package do you need to import to use ArrayLists in Java?

• java.lang

• java.net

• java.io

• java.util

How do you add an element to an ArrayList?

• Using the insert method

• Using the add method

• Using the append method

• Using the push method

What method is used to determine the number of elements in an ArrayList?

• elements()

• size()

• count()

• length()

What is a major difference between ArrayLists and arrays in terms of data types?

• ArrayLists can store primitive types directly.

• Arrays can store reference types only.

• ArrayLists can only store strings.

• ArrayLists can only store reference types, not primitives.

Why can't ArrayLists store primitive types directly?

• They can only store objects.

• They require a fixed size.

• They only hold reference types, not primitives.

• They are designed to store only strings.

What is the purpose of the enhanced for loop in Java?

• To add elements to a collection.

• To remove elements from a collection.

• To iterate over elements in a collection more efficiently.

• To sort elements in a collection.