Re: want to read in from file and write to components like textfield

Question

I have a file that has been written using PrintWriter
The file is written with only the escape character '\t'
formating and not '\n'
here is 'file.txt':
s a     Alan     Credit Account     333333     55555     3     March     1972     20000.0     mmilo
I now want to read this and write to various components eg. Textfield
textfield.setText(readinText);
The file is written with these commands:
myprint.print(initials);
myprint.print('\t');
myprint.print(surname);
myprint.print('\t');
so basicly initials '\t' surname '\t' card type '\t' etc
How can I read this file and write to the components?
I am thinking of using BufferedReader
is this o.k?
String str;
try
{ BufferedReader myinp;
myinp = new BufferedReader( new FileReader("file.txt"));
while ((str = myinp.readLine()) !=null)
{ //this is where I need help, given that i have
// just read in a line how can I seperate it
// i.e initials, surname, card type etc?
// please help
myinp.close();
catch(IOException e)
{ System.err.println("Exception: " + e.getMessage());
System.exit(1);
}

Answer 1

Hi,
1. read in the whole file in a string
2. then do the following - lets say s is your readin string
StringTokenizer st = new StringTokenizer(s,"\t");
the StringTokenizer separates that automatically for you - every call to st.nextToken() returns a string with one "value", the "\t" is not returned. Let's say you have 4 JTextFields called tf1 to tf4 and you want to fill in the 4 values from the StringTokenizer
tf1.setText(st.nextToken());
tf2.setText(st.nextToken());
tf3.setText(st.nextToken());
tf4.setText(st.nextToken());
how many values are readable by nextToken()-calls are returned by st.getTokenCount() and you can ask if there are more to read by st.hasMoreTokens() which return a boolean.
greetings Marsian