Write file using BufferedWriter in Java [duplicate]

Answer 1

You have to close your BufferedWriter using close():

writer.close();

Answer 2

You should always close opend resources explicitly or implicitly with Java 7 try-with-resources

    try (BufferedWriter bw = new BufferedWriter(new FileWriter(file))) {
         ...            
    }

besides, there is a more convenient class to write text - java.io.PrintWriter

try (PrintWriter pw = new PrintWriter(file)) {
    pw.println("Number of words: " + word);
    ...
}

Answer 3

You have to flush and close your writer:

writer.flush();
writer.close();