9.5 - Reading from a File
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Practice Questions
Test your understanding with targeted questions
What does the Scanner class do?
💡 Hint: Think about how we read user input in Java.
Name one method of the Scanner class.
💡 Hint: Consider how you check for the next line of data.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What class is typically used to read files in Java?
💡 Hint: Think of the class that reads line by line.
True or False: You must close a Scanner after use.
💡 Hint: What do we always emphasize after usage?
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Challenge Problems
Push your limits with advanced challenges
Write a program using Scanner that reads a file called 'data.txt' and counts the number of lines in the file, also handling the possible exception if the file doesn't exist.
💡 Hint: Consider how you would typically read each line in a loop.
Discuss how your program would behave if you forgot to use the try-catch block while opening a file within the Scanner class.
💡 Hint: Think of it like planning for bumps on the road; how would you manage unexpected issues?
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