File Handling Overview of Java IO API | Summary and Q&A

TL;DR

This session provides an overview of the Java IO API for file handling in Java programming.

Key Insights

• 🧍 API stands for Application Programming Interface and is used to provide specific functionality within an application.
• 📦 The Java IO package, java.io, is a predefined package in Java that deals with input-output operations for file handling.
• 🎏 The Java IO API categorizes classes based on whether they transfer data in the form of bytes (byte stream) or characters (character stream).
• 💁 The abstract classes, such as InputStream and OutputStream, form the base for input and output operations, respectively.
• 🏛️ Buffered classes, like BufferedInputStream and BufferedWriter, provide buffering capabilities for efficient file handling.
• 👻 DataInputStream and DataOutputStream allow reading and writing of primitive data types.
• 🏛️ FileReader and FileWriter classes are used for character-based file handling.

Transcript

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Questions & Answers

Q: What is the purpose of the Java IO API?

The Java IO API is used for file handling in Java applications. It provides functionality for input-output operations related to files, allowing developers to read from and write to files easily.

Q: How is the Java IO package categorized?

The Java IO package is categorized into byte stream and character stream classes. The byte stream classes deal with transferring data in the form of bytes, while the character stream classes handle data in the form of characters.

Q: What is the difference between input stream and output stream in the Java IO API?

In the Java IO API, an input stream is used to read data from a source (e.g., a file), while an output stream is used to write data to a destination (e.g., a file). Both input and output streams have abstract classes and further classes that extend them to provide specific functionalities.

Q: What are buffered classes in the Java IO API?

Buffered classes, such as BufferedInputStream and BufferedWriter, are classes that provide buffering capabilities for input-output operations. They improve performance by reducing the number of interactions with the underlying input-output device, resulting in faster file handling operations.

Summary & Key Takeaways

• Java IO API is an application programming interface that provides functionality for input-output operations related to file handling in Java.

• The Java IO package, java.io, contains various classes that are categorized as byte stream or character stream based on the type of data they transfer.

• The classes in the byte stream category include FileInputStream, DataInputStream, and BufferedInputStream, while the character stream category includes FileReader and BufferedWriter.