21.1.2. File Class

Try these first

1. 1.

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

   Hint

   Think about what checks for a file's presence.

2. 2.

   How do you create a new File object for 'myfile.txt'?

   Hint

   Remember how we declare an object in Java.

3. 3.

   What does the method exists() in the File class do?

   • Checks the file size
   • Checks if the file is readable
   • Checks if the file exists

   Hint

   Focus on the purpose of the method.

4. 4.

   True or False: The File class can only represent files, not directories.

   • True
   • False

   Hint

   Consider what else you can represent with the File class.

5. 5.

   Write a Java program that prompts the user for a file name, checks if it exists, and either displays the full path or an error message.

   Hint

   Use methods from the File class to accomplish this task.

6. 6.

   Explain how the File class can be used to check file permissions apart from checking existence.

   Hint

   Think about the various interactions you might need with files.