FileWriter, BufferedWriter in java
In the Java programming language, both FileWriter and BufferedWriter file handling function methods are used to create or write data to user-defined files. The working steps, methods, and features of the Java FileWriter and BufferedWriter file handling functions are multiple, with their individual performance characteristics.
So, let’s take a closer look at the FileWriter and BufferedWriter file handling function methods in Java programming.
FileWriter Class in Java.
FileWriter is a built-in class in Java file handling that is used to create new character data in a Java user-defined file. The FileWriter class is a subclass of OutputStreamWriter, and the FileWriter class is designed to create characters instead of bytes in a specific order. In a Java program, FileWriter writes data to a file by creating characters one character at a time.
Important Features of FileWriter in Java File Handling.
- Character-oriented – In Java file handling, it creates or writes characters to a file using the system’s default character encoding method.
- Direct writing – In Java file handling, it creates or writes one character at a time directly to a file.
- File creation – In Java file handling, if a file does not exist, the FileWriter function can create it.
- No buffering – In Java file handling, it does not buffer file data. Because of this, it may not be the best choice for creating or writing more data to a file.
Basic concepts of a FileWriter in Java file handling.
- write(int p) – In Java file handling, this function creates or writes a single character to an existing file.
- write(char[] cube) – In Java file handling, this function helps create array elements by creating an array of characters in a file.
- write(String str1) – The string function in Java file handling helps create a string in a file.
- close() – Closes the currently open stream function in the stream, and frees any system resources associated with the file stream.
Example of a FileWriter in Java file handling.
import java.io.FileWriter;
import java.io.IOException;
public class FileWriterIllustration {
public static void main(String[] args) {
FileWriter fwriter = null;
try {
fwriter = new FileWriter(“samplefile.txt”);
fwriter.write(“Welcome to, Vcanhelpsu”); // Here it writes a string to the samplefile.txt file
fwriter.write(‘\n’); // Here it writes a newline character in the file
fwriter.write(“Here we can see an example of the FileWriter file handling function.”);
} catch (IOException e) {
System.out.println(“Here it displays an error writing into the file – ” + e.getMessage());
} finally {
try {
if (fwriter != null) {
fwriter.close(); // Here it closes the fwriter after its usage ends
}
} catch (IOException e) {
System.out.println(“It displays an error when closing the fwriter file ” + e.getMessage());
}
}
}
}
}
Special features of the Java FileWriter function in file handling.
- In the above program, the FileWriter function creates characters in the file.
- The FileWriter function is the right choice for small files or for creating individual characters or strings of text.
- The FileWriter function does not buffer data, so each file creation operation directly moves data to the internal file. This may not be appropriate for large-volume project files.
BufferedWriter class in Java.
In the Java language, BufferedWriter, a subclass of the Writer class, is a library feature that buffers file data to properly create new desired file characters in a user-defined Java file. It wraps other writers, such as FileWriter, to provide buffering for file data. This improves system performance when creating large file data by reducing the number of actual I/O operations during file handling.
Special features of BufferedWriter in Java.
- Buffering – It buffers file data to improve the performance of new data creation processes in file handling, reducing the number of file I/O operations.
- Line writing – It provides the newLine() function method to add new line breaks to the file handling process, making it easy to create text files with multiple lines within an existing file.
- Brighter writing – It creates large chunks of data in a file at once instead of character-by-character, due to buffering in the file handling process.
Commonly used methods of the Java File BufferedWriter.
- write(int p) – Creates a single character in the file handling process.
- write(char[] cube) – Creates an array of characters in the file handling process.
- write(String str1) – Creates a string of data in the file handling process.
- newLine() – Uses a system-specific line separator (e.g., \n or \r\n) to insert a new blank line into the existing file as needed.
- flush() – Flushes the buffer in the file handling process, then writes any buffered data to the file.
- close() – Closes the stream in the file handling process, then flushes any remaining file data to the file.
Example of a BufferedWriter in Java.
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
public class BufferedWriterIllustration {
public static void main(String[] args) {
BufferedWriter fwriter = null;
try {
fwriter = new BufferedWriter(new FileWriter(“newfile.txt”));
fwriter.write(“Welcome to, Vcanhelpsu”); //here it Writing a string data to the file
fwriter.newLine(); //here it Writing a new line in existing file
fwriter.write(“Here This is an example use of BufferedWriter.”);
} catch (IOException e) {
System.out.println(“Here it displays Error writing to the file. ” + e.getMessage());
} finally {
try {
if (fwriter != null) {
fwriter.close(); // Here it closes the fwriter after use.
}
} catch (IOException e) {
System.out.println(“Here it displays Error closing the fwriter file- ” + e.getMessage());
}
}
}
}
Summary of both FileWriter and BufferedWriter file handling functions.
- In Java file handling tasks, the BufferedWriter function is generally preferred over FileWriter for large-volume files or when creating large file text.
- In Java file handling tasks, the BufferedWriter function buffers data before writing, which improves efficiency by reducing the number of file I/O operations in the program.
- In Java file handling, the BufferedWriter function provides a newLine() method to write platform-specific line separators, making it useful for text files with multiple lines in existing programs.
