[Java] IO-03 TransForm1 / TransForm2

import java.io.*;

public class TestTransForm1 {
    public static void main(String[] args) {
        try {
            OutputStreamWriter osw = new OutputStreamWriter(
                    new FileOutputStream("d:\bak\char.txt"));
            osw.write("mircosoftibmsunapplehp");
            System.out.println(osw.getEncoding());
            osw.close();
            osw = new OutputStreamWriter(new FileOutputStream(
                    "d:\bak\char.txt", true), "ISO8859_1"); // latin-1
            osw.write("mircosoftibmsunapplehp");
            System.out.println(osw.getEncoding());
            osw.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import java.io.*;

public class TestTransForm2 {
    public static void main(String args[]) {
        InputStreamReader isr = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(isr);
        String s = null;
        try {
            s = br.readLine();
            while (s != null) {
                if (s.equalsIgnoreCase("exit"))
                    break;
                System.out.println(s.toUpperCase());
                s = br.readLine();
            }
            br.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
} // 阻塞

import java.io.*;
public class TestDataStream {
  public static void main(String[] args) {
    ByteArrayOutputStream baos = 
                        new ByteArrayOutputStream(); 
    DataOutputStream dos = 
                        new DataOutputStream(baos);
    try {
      dos.writeDouble(Math.random());
      dos.writeBoolean(true);
      ByteArrayInputStream bais = 
          new ByteArrayInputStream(baos.toByteArray());
      System.out.println(bais.available());
      DataInputStream dis = new DataInputStream(bais);
      System.out.println(dis.readDouble());
      System.out.println(dis.readBoolean());
      dos.close();  dis.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
}