What are the advantages of buffering in Java?

Buffering improves input/output operations performance by reducing the number of physical device (disk, network) accesses. Data is temporarily stored in memory (buffer) and processed in large chunks rather than byte by byte.

Advantages:

• Reduction of system calls: Reading/writing data in blocks requires fewer calls to the operating system.
• Reduction in execution time: Fewer system calls lead to lower overhead and faster I/O operations.
• Efficient use of hardware resources: Buffering allows more rational use of data exchange speed between memory and input/output devices.
• Improved throughput: The ability to process large volumes of data at once increases the overall system throughput.

When using buffered streams (e.g., BufferedReader, BufferedWriter, BufferedInputStream, BufferedOutputStream), data is first accumulated in the buffer in memory, then read or written to the target source or receiver.

// Example of using BufferedWriter for buffered writing
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;

public class BufferedWritingExample {

    public static void main(String[] args) {
        try (BufferedWriter writer = new BufferedWriter(new FileWriter("output.txt"))) {
            writer.write("This is the first line.\n");
            writer.write("This is the second line.\n");
            // Data may not be immediately written to the file, but buffered
            writer.flush(); // Forcibly writes data from buffer to file
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}