I would start with closing reader, and flushing writer: public class FileReplace { List<String> lines = new ArrayList<String>(); String line = null; public void doIt() { try { File f1 = new File(“d:/new folder/t1.htm”); FileReader fr = new FileReader(f1); BufferedReader br = new BufferedReader(fr); while ((line = br.readLine()) != null) { if (line.contains(“java”)) line = … Read more
According to coderanch.com, if we combine the answers we get: FileWriter is the character representation of IO. That means it can be used to write characters. Internally FileWriter would use the default character set of the underlying OS and convert the characters to bytes and write it to the disk. PrintWriter & FileWriter. Similarities Both … Read more
Make sure that when you create an instance of a FileWriter, that you are appending to the end of it. This can be done by using this specific FileWriter constructor which takes an additional boolean as a second parameter. This boolean tells the FileWriter to append to the end of the file, rather than overwriting … Read more
Something like: File file = new File(“C:\\user\\Desktop\\dir1\\dir2\\filename.txt”); file.getParentFile().mkdirs(); FileWriter writer = new FileWriter(file);
If you want to get new line characters used in current OS like \r\n for Windows, you can get them by System.getProperty(“line.separator”); since Java7 System.lineSeparator() or as mentioned by Stewart generate them via String.format(“%n”); You can also use PrintStream and its println method which will add OS dependent line separator at the end of your … Read more
Pass true as a second argument to FileWriter to turn on “append” mode. fout = new FileWriter(“filename.txt”, true); FileWriter usage reference