Problems with BufferedReader / PrintWriter?
bufferedreader, file, java
Solution
Where do you flush/close your PrintWriter or FileOutputStream ? If the program exits and this is not done, not all your results will be written out.
You need `out.close()` (possibly a `p.flush()` as well?) at the end of your process to close the file output stream
Problem
I'm using BufferedReader and PrintWriter to go through each line of an input file, make a change to some lines, and output the result. If a line doesn't undergo a change, it's just printed as is to the output file. For some reason however, the process ends prematurely. The code looks something like this: ``` BufferedReader in = new BufferedReader(new FileReader("in.txt")); FileOutputStream out = new FileOutputStream("out.txt"); PrintWriter p = new PrintWriter(out); String line = in.readLine(); while(line!=null) { if(line is special) do edits and p.println(edited_line); else p.println(line); line = in.readLine(); } ``` However, for some odd reason, this process ends prematurely (actually prints out a half of a line) towards the very end of my input file. Any obvious reason for this? The while loop is clearly being ended by a null. And it's towards the end of my 250k+ line txt file. Thanks!