Back to feed
Renewal·서른의 생활코딩

ex7) java.io.* - Character Stream

NS
normalstory
cover image

// Character stream file I/O example
// Uses FileReader to read characters from a file
// and FileWriter to write characters to a file

import java.io.*;

public class CharStreamExample {
  public static void main(String[] args) {
    try {
      FileReader fr = new FileReader("input.txt");
      FileWriter fw = new FileWriter("output.txt");
      int ch;
      while((ch = fr.read()) != -1) {
        fw.write(ch);
      }
      fr.close();
      fw.close();
    } catch(IOException e) {
      e.printStackTrace();
    }
  }
}

This English version was translated by Claude.

친절한 찰쓰씨
Written by
친절한 찰쓰씨

Pleasant Charles — UI/UX researcher at AIT. Keeping notes on design, planning, and slow days here since 2010.

More on the author's page

Keep reading

Renewal

Steadily, for the long haul, without burning out

Mar 31, 2026·9 min
Renewal

Tech-life balance

Feb 7, 2026·3 min
Renewal

Humanality, by Park Jeong-ryeol

Feb 7, 2026·11 min