Complete Java SE 8 Developer Bootcamp - Comparable

The video tutorial explains how to sort collections and arrays using natural ordering, which follows Unicode precedence. It discusses the need to implement the Comparable interface for sorting custom classes, using the MyDate class as an example. The tutorial covers handling ClassCastException and implementing the compareTo method to define sorting logic. It concludes with instructions on sorting in both ascending and descending order.

What is the natural ordering in Java based on?

• ASCII values

• Unicode values

• Alphabetical order

• Numerical order

Why do we need to implement the Comparable interface for custom classes?

• To enable automatic sorting

• To avoid syntax errors

• To define a custom sorting order

• To improve performance

What error occurs if a custom class does not implement the Comparable interface?

• ClassCastException

• NullPointerException

• IllegalArgumentException

• ArrayIndexOutOfBoundsException

In the compareTo method, what does a positive return value indicate?

• The current object is equal to the compared object

• The current object should be sorted after the compared object

• The current object is not comparable

• The current object should be sorted before the compared object

How can you modify the compareTo method to sort in descending order?

• By returning the difference of the compared object's year minus the current object's year

• By returning zero for all comparisons

• By implementing a different interface

• By using a different sorting algorithm