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Reg PrintWriter  RSS feed

 
Ranch Hand
Posts: 42
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Hi ,
I am using java1.4
I write following code.
Problem is : In the end new file is created , but it is empty nothing is written
in that file . Why ? line1 and line2 should be placed in the file , why it is not happening ?

import java.io.*;
class Test
{
public static void main(String args[])
{
try {
File f = new File("test12.txt");
if(!f.exists())
f.createNewFile();
FileWriter fw = new FileWriter(f);
PrintWriter pw = new PrintWriter(fw);
pw.println("line1");
pw.println("line2");
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
 
Ranch Hand
Posts: 162
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you need to flush() it..
 
Ranch Hand
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Yeah and close
 
Ranch Hand
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You need to close FileWriter and PrintWriter than only the content in the file will be commited and than line1 and line2 would be available in the file.
 
prashanth kumar
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Posts: 162
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Are we saying here that "close()" method call is mandatory for stuff to be written to file??I dont think so..Its just a best practise..

Cheers
Prashanth
 
It is sorta covered in the JavaRanch Style Guide.
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