Java Programming for Complete Beginners - Java 16 - Step 03 - String class - Introduction and Exercise - Print Each Word

This video tutorial introduces Java's inbuilt reference types, focusing on the string class. It explains the uniqueness of string literals, demonstrates methods like length and charAt, and explores the substring method. The video also introduces exceptions in Java, providing examples of index out of bounds exceptions. An exercise is provided to practice string manipulation, with a promise to discuss solutions in the next video.

What makes the String class in Java unique compared to other classes?

• It cannot be used in loops.

• It can be instantiated without using the 'new' keyword.

• It requires a special import statement.

• It is not part of the Java standard library.

How can you determine the number of characters in a string in Java?

• Using the size() method.

• Using the count() method.

• Using the length() method.

• Using the charCount() method.

In Java, what is the starting index for characters in a string?

• 1

• 0

• 2

• It varies depending on the string.

Which method is used to access a specific character in a string by its index?

• substring()

• indexOf()

• charAt()

• getChar()

What does the substring method in Java do?

• It converts a string to uppercase.

• It extracts a portion of a string based on specified indices.

• It removes whitespace from a string.

• It splits a string into an array of characters.

What happens if you try to access an index that is out of bounds in a string?

• The program will crash without any error message.

• The program will return a null value.

• An IndexOutOfBoundsException will be thrown.

• The program will automatically correct the index.

When specifying a range for a substring, what is true about the end index?

• It is ignored.

• It must be greater than the start index by at least 2.

• It is inclusive.

• It is exclusive.