FileWriter creates a Writer that you can use to write to a file. FileWriter is convenience class for writing character files. The constructors of this class assume that the default character encoding and the default byte-buffer size are acceptable. To specify these values yourself, construct an OutputStreamWriter on a FileOutputStream.

FileWriter is meant for writing streams of characters. For writing streams of raw bytes, consider using a FileOutputStream.

• FileWriter(File file) - Constructs a FileWriter object given a File object.
• FileWriter(File file, boolean append) - Constructs a FileWriter object given a File object.
• FileWriter(FileDescriptor fd) - Constructs a FileWriter object associated with a file descriptor.
• FileWriter(String fileName) - Constructs a FileWriter object given a file name.
• FileWriter(String fileName, boolean append) - Constructs a FileWriter object given a file name with a boolean indicating whether or not to append the data written.

• void write(String text) - It is used to write the string into FileWriter.
• void write(char c) - It is used to write the char into FileWriter.
• void write(char[] c) - It is used to write char array into FileWriter.
• void flush() - It is used to flushes the data of FileWriter.
• void close() - It is used to close the FileWriter.

FileWriter is meant for writing streams of characters so provide input for below program is character string like:

String content = "This is the text content";

This program writes character streams to file "sample.txt" file.

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
/**
 * The class demonstrate the usage of FileWriter class methods.
 * @author javaguides.net
 *
 */
public class FileWritterExample {
	public static void main(String[] args) {
		File file = new File("sample.txt");
		String content = "This is the text content";
		try (FileWriter fop = new FileWriter(file)) {
			// if file doesn't exists, then create it
			if (!file.exists()) {
				file.createNewFile();
			}
			fop.write(content);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

FileWriter