13.4.3. File Class

Try these first

1. 1.

   What method do you use to check if a file exists?

   Hint

   Think about how you would confirm presence.

2. 2.

   How would you create a new file named 'test.txt'?

   Hint

   Consider the sequence of creating a file.

3. 3.

   What does the exists() method do?

   • Checks if a file can be read
   • Checks if a file exists
   • Checks file size

   Hint

   Reflect on the importance of confirming a file's presence.

4. 4.

   True or False: The length() method returns the last modified date of the file.

   • True
   • False

   Hint

   Consider what 'length' implies in context.

5. 5.

   Design a Java program that checks if a specified file exists and deletes it. If it does not exist, print an appropriate message.

   Hint

   Remember to handle potential IOException for the delete operation.

6. 6.

   Create a script that logs the sizes of multiple files in a directory and outputs them to a text file.

   Hint

   Utilize FileWriter for output and ensure you close it after writing.