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BufferedWriter class

java.lang.Object

java.io.Writer

java.io.BufferedWriter

Writes text to a character-output stream with buffer.

Constructor	Summary
BufferedWriter(Writer out)	Creates a buffered character-output stream that uses a default-sized output buffer.
BufferedWriter(Writer out, int sz)	Creates a new buffered character-output stream that uses an output buffer of the given size.

Return	Method	Summary
void	close()	Closes the stream, flushing it first.
void	flush()	Flushes the stream.
void	newLine()	Writes a line separator.
void	write(char[] cbuf, int off, int len)	Writes a portion of an array of characters.
void	write(int c)	Writes a single character.
void	write(String s, int off, int len)	Writes a portion of a String.

Revised from Open JDK source code

Create BufferedWriter from standard System.out


import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Main {
  public static void main(String[] args) throws Exception {
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    String strLine = in.readLine();
    BufferedWriter out = new BufferedWriter(new OutputStreamWriter(System.out));
    out.write(strLine, 0, strLine.length());
    out.flush();
    in.close();
    out.close();
  }
}

Write String to a file with BufferedWriter


import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.Writer;

public class Main {
  public static void main(String[] args) throws Exception {
    Writer writer = null;

    String text = "This is a text file";

    File file = new File("write.txt");
    writer = new BufferedWriter(new FileWriter(file));
    writer.write(text);
    writer.close();

  }
}

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CharArrayWriter »

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