11. Basic Input/Output and Data File Handling
Input/Output (I/O) in Java encompasses the processes of reading and writing data, essential for user interaction and data management. The chapter outlines methods for input using classes like Scanner, and techniques for output using System.out methods. It also details file handling aspects, including reading from and writing to files through specific classes, while emphasizing the importance of exception handling and resource management in I/O operations.
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Sections
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What we have learnt
- Input and Output are essential for interactivity and data processing in Java programs.
- The Scanner class is commonly used for user input, while System.out.print() and System.out.println() are used for displaying output.
- File handling allows Java programs to read and write data to external files using classes like FileReader, BufferedReader, FileWriter, and BufferedWriter.
- Always handle exceptions properly, especially when working with file I/O operations, and close file streams to prevent resource leaks.
- Understanding file I/O in Java is essential for developing programs that interact with external data.
Key Concepts
- -- Input/Output (I/O)
- The process of reading data from a source and writing data to a destination.
- -- Scanner Class
- A Java utility for reading input from various sources like keyboard input, files, or streams.
- -- File Handling
- The techniques employed in Java to read from and write to files.
- -- BufferedReader
- A class that reads text from a character-input stream, buffering characters for efficient reading of lines.
- -- Exception Handling
- The process of responding to the occurrence of exceptions during file operations.
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