How to write Files with java
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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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