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Author

Re: FileWriter write operation

venkat venkataraman
Greenhorn

Joined: Apr 14, 2005
Posts: 3
I am trying to read in contents from a file, use STringTokenizer to tokenize the file using "/" as the delimiter, and print the contents to another file. I am able to read in the file, tokenize it and even print it to the standard output, but am not able to print it to an output file. The output file is created, but empty. Could anyone please tell me what I am missing here?

Code:

import java.io.*;
import java.util.StringTokenizer;
class Tokenize{
public static void main(String[] args){
try{
FileReader reader = new FileReader("Input file name")/read in the file
BufferedReader buf = new BufferedReader(reader);//reading the contents into a buffer
FileWriter writer = new FileWriter("Output file name");
//PrintWriter out = new PrintWriter(writer);
String line = null;
String val = null;
while((line=buf.readLine())!=null){
StringTokenizer parser = new StringTokenizer(line, "/");//parse with ":" as the delimiter
while(parser.hasMoreTokens()){
//System.out.println(parser.nextToken());
val = parser.nextToken();
writer.write(val);
//System.out.println(val);

//writer.write(parser.nextToken());
}

}
}
catch(Exception e){
e.printStackTrace();
}
}
}
Michael Dunn
Ranch Hand

Joined: Jun 09, 2003
Posts: 4632
> Could anyone please tell me what I am missing here?

writer.close();
venkat venkataraman
Greenhorn

Joined: Apr 14, 2005
Posts: 3
Thanks Michael, it worked. I didn't realize that I missed close().....
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: Re: FileWriter write operation
 
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