Name: nt126004			Date: 11/06/2001


java version "1.4.0-beta2"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta2-b77)
Java HotSpot(TM) Client VM (build 1.4.0-beta2-b77, mixed mode)

The following naive Cat equivalent will gobble up the first 40 characters when
fed interactively from the keyboard under MS Windows 95.

Instructions:

- Compile the enclosed Cat.java under MS Windows 95
	javac Cat.java
- Run it to get input from the keyboard
	java Cat
- Input 41 characters and press <Enter> (on some systems it is more characters)
- Input some more lines
- Input <Ctrl>Z to end input
- Watch the first 40 characters disappear in the output

I bet it's something in the System.out in the Windows version of JDK 1.3.1: I
can't observe this problem under Solaris/Intel, for example.  If an OutputStream
is used instead of a BufferedOutputStream, the effect is not observable.

// Cat.java

import java.io.*;

/** This class implements a simplified UNIX cat utility. */
public class Cat {
  /** Copies a given buffered reader stream to the standard output.
      @param    r       buffered intput stream
      @param    w       buffered output stream
      @throws   IOException     on any I/O error
  */
  static void cat(InputStream r,BufferedOutputStream w) throws IOException
  {
    int c;

    while ((c = r.read()) != -1)
      w.write(c);

    w.flush();
  }

  /** Synopsis:
      <PRE>
      cat [file1] [file2] ...
      </PRE>
      Copies the given files onto the standard output.
      Without arguments, reads the standard input.
      @param    args       array of string arguments
      @throws   IOException     on any I/O error
  */
  public static void main(String[] args) throws IOException
  {
    BufferedOutputStream w = new BufferedOutputStream(System.out);

    if (args.length > 0)
      for (int i = 0; i < args.length; i++)
      {
        BufferedInputStream r =
          new BufferedInputStream(new FileInputStream(args[i]));
        
        cat(r,w);

        r.close();
      }
    else
      cat(System.in,w);
  }
}
(Review ID: 135069) 
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