21.1. Java I/O (java.io Package)

Try these first

1. 1.

   What is the purpose of the FileInputStream class?

   Hint

   Think about how you would read binary data.

2. 2.

   What does serialization mean in Java?

   Hint

   Consider what happens when you save an object.

3. 3.

   What is the main purpose of the java.io package?

   • For network programming
   • For input and output operations
   • For creating graphics

   Hint

   Think about what the package is primarily used for.

4. 4.

   True or False: A File class object can represent both files and directories.

   • True
   • False

   Hint

   Consider the versatility of handling file systems in Java.

5. 5.

   Design a Java application that reads a large binary file using FileInputStream, processes each byte, and writes the processed data to a new file using FileOutputStream.

   Hint

   Think of how to handle file streams effectively in a loop.

6. 6.

   Create a class that uses serialization to save an object to a file, and another class to read the object back into memory. Be sure to handle exceptions appropriately.

   Hint

   Consider how serialization affects object state management.