The Complete Java Developer Course: From Beginner to Master - String Methods, Part 2

This video tutorial covers various methods of the Java String class, including charAt, length, equals, compareTo, toUpperCase, toLowerCase, substring, and indexOf. It explains method overloads and provides a coding example to demonstrate these methods in action. The tutorial includes a challenge to create a Java class for parsing names using user input. The video concludes with an introduction to the StringBuilder class, which allows for modifications to string data without creating new objects.

Which of the following methods is NOT mentioned as a common string method in the introduction?

• replace

• equals

• length

• charAt

What do the toUpperCase and toLowerCase methods return?

• The same string object with modified case

• A new string object with modified case

• An integer indicating the number of changes

• A boolean indicating success

What is the output of the toUpperCase method when applied to a string?

• An error message

• The original string unchanged

• The original string in lowercase

• A new string in uppercase

How many arguments does the first overload of the substring method take?

• One

• Three

• None

• Two

Which method is used to extract a portion of a string?

• equals

• indexOf

• substring

• charAt

What is the significance of the second argument in the substring method's second overload?

• It specifies the character to be replaced

• It specifies the length of the substring

• It specifies the ending index, which is excluded

• It specifies the starting index

What does the indexOf method return if the substring is not found?

• 0

• An exception

• -1

• null

In the practical example, what is the purpose of the Name Parser program?

• To find the index of a character in a name

• To split a full name into first and last names

• To convert a name to uppercase

• To calculate the length of a name

Which method is used to find the index of a space in a string?

• indexOf

• substring

• equals

• charAt

What is the main challenge when splitting a full name into first and last names?

• Finding the length of the name

• Identifying the space between the names

• Converting the names to lowercase

• Counting the number of characters