package elte.java2_utikalauz5.io;

import java.io.*;

/**
Bájt- és karaktertömbök, sztringek.

@link.forrásfájl {@docRoot}/../data/io/src Tombok.java
@link.letöltés {@docRoot}/../data/io Tombok.jar
@since Java 2 Útikalauz programozóknak 1.3
*/
public class Tombok {

  public static void main( String[] args ) throws IOException {
    fóka();
    róka();
    baos();
    sw();
  }

  public static void sw() throws IOException {
    StringWriter out = new StringWriter(10);
    for( int i=97; i<100; i++ ) out.write(i);
    out.close();
    StringReader in = new StringReader(out.toString());
    StringBuffer buf = out.getBuffer();
    System.out.println(buf);
  }

  public static void baos() throws IOException {
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    for( int i=97; i<100; i++ ) out.write(i);
    out.close();
    byte[] b = out.toByteArray();
    System.out.write(b);
    out.writeTo(System.out);
    String s = out.toString();
    System.out.println(s);
  }

  public static void róka() throws IOException {
    char[] t = {'r', 'ó', 'k', 'a'};
    CharArrayReader in = new CharArrayReader(t,2,2);
    int c = in.read(); // c értéke 'k'
    in.reset();
    c = in.read();     // c értéke ismét 'k' (a JDK 1.1-ben 'r')
    System.out.println(c=='k');
    in.close();
  }

  public static void fóka() throws IOException {
    char[] t = {'r', 'ó', 'k', 'a'};
    CharArrayReader in = new CharArrayReader(t);
    t[0] = 'f';
    System.out.println(in.read()=='f');  // "true"-t fog kiírni
    in.close();
  }
}