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/ * Writefile.java

Receive input from the keyboard and output it to the screen as is

In addition, the data entered by the keyboard is stored in a file in order.

Usage: java Writefile file name

To end this program, enter a # sign at the beginning of the line.

, /

Import java.io.*

/ / Class Writefile

Public class Writefile

{

Public static void main (String [] args)

{

Byte [] buff = new byte [1024]

Boolean cont = true; / / Loop control variable

FileOutputStream outfile = null; / / File output object

/ / generate an object outfile, ready to export to a file

Try

{

Outfile = new FileOutputStream (args [0])

}

Catch (FileNotFoundException e)

{

System.err.println ("File does not exist")

System.exit (1)

}

/ / execute the following loop when no full stop is entered at the beginning of the line

While (cont)

{

Try

{

Int n = System.in.read (buff); / / read data from System.in

System.out.write (buff, 0, n); / / write to System.out

If (buff [0] = ='#')

{

Cont = false

}

Else

{

Outfile.write (buff, 0, n)

}

}

Catch (Exception e)

{

System.exit (1)

}

}

/ / close the file

Try

{

Outfile.close ()

}

Catch (IOException e)

{

System.err.println ("file error")

System.exit (1)

}

}

}

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