Write a String in File

Question

Hi All,
I want to write a string into a file, and I wrote the following code.
package fileoperations;
import java.io.*;
class FileWriterDemo {
     public static void main(String args[]) throws Exception {
          String source = "Now is the time for all good men\n"
          + " to come to the aid of their country\n"
          + " and pay their due taxes.";
          FileReader fr = new FileReader("./src/domparser/employee.xml");
          FileWriter f0 = new FileWriter("./src/domparser/sample.txt");
          BufferedReader br = new BufferedReader(fr);
          int c=0;
          while ((c=br.read())!=-1) {
               System.out.print((char)c);
               f0.write((char)c);
          f0.close();
          fr.close();
}The above specified code is running successfully and write the string in the specified file. If I comment the following
two lines
            //f0.close()
            //fr.close()
         The string was not written in the specified file. I don't know what is the reason for that. Can any one give me the
reason for that.
Thanks and Regards,
D.Maheswaran

Answer 1

f0.close();This is the critical line. FileWriter acts like a buffer and calling the close method causes the buffer to be flushed, ie push out all the data stored in the buffer. Otherwise your program can and has exited with data left in the buffer and not written out to the file.