21. Java I/O and NIO

Try these first

1. 1.

   What are byte streams used for?

   Hint

   Think about the type of data.

2. 2.

   List one example of a character stream class.

   Hint

   Consider classes dealing with text.

3. 3.

   Which of the following is a byte stream class?

   • FileReader
   • DataInputStream
   • BufferedReader

   Hint

   Remember the classes that handle binary data.

4. 4.

   True or False: Java NIO is only useful for small files.

   • True
   • False

   Hint

   Think about the advantages of NIO.

5. 5.

   Create a Java program that uses NIO to watch for changes in a specified directory and print out the type of event that occurs.

   Hint

   Focus on setting up the WatchService and registering the directory.

6. 6.

   Design a system that utilizes memory-mapped files to manipulate a large dataset efficiently. Outline your approach and show code snippets.

   Hint

   Plan mapping the file and think about data manipulations on that mapped buffer.