Java.io.BufferedWriter class in Java

BufferedWriter class in Java is used to write text efficiently to character-based output streams. It stores characters in a buffer before writing them to the destination, thereby reducing the number of I/O operations and improving performance.

• Faster Writing: Writes large chunks of data at once instead of writing character by character.
• Easy to Use: Provides methods like write() and newLine() to simplify text output.

Class Declaration 

public class BufferedWriter extends Writer

BufferedWriter class extends the Writer class, meaning it is a subclass specialized for buffered character output operations.

Example: Writing Text to a File

File written successfully.

Explanation: This program creates a BufferedWriter that wraps a FileWriter to write text efficiently to output.txt. The write() method writes text, and newLine() inserts a line break.

Constructors of BufferedWriter Class

1. BufferedWriter(Writer out): Creates a buffered character output stream using the specified writer.

BufferedWriter bw = new BufferedWriter(new FileWriter("file.txt"));

2. BufferedWriter(Writer out, int size): Creates a buffered character output stream with a custom buffer size.

BufferedWriter bw = new BufferedWriter(new FileWriter("file.txt"), 8192);

Example: Writing User Input to a File

Output:

output.txt:

Methods in BufferedWriter class