Java tutorial
import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.OutputStream; import java.io.OutputStreamWriter; public class Main { public static void main(String[] args) { String s = "from java2s.com!"; try { OutputStream os = new FileOutputStream("test.txt"); OutputStreamWriter writer = new OutputStreamWriter(os); FileInputStream in = new FileInputStream("test.txt"); writer.write(s, 0, 5); writer.flush(); for (int i = 0; i < 5; i++) { System.out.print((char) in.read()); } writer.close(); in.close(); } catch (Exception ex) { ex.printStackTrace(); } } }