How to read a file content for editing?

Question

Now i am using FileInputStream to read its content by bytes. How do i read the content line by line as string so that i am able to do some editing using replace().

Answer 1

    public String load() throws FileNotFoundException, IOException {
         BufferedReader r = new BufferedReader(new FileReader(new File(this.getClass().getResource(filename).getPath())));
         String s = r.readLine();
         StringBuffer result = new StringBuffer();
         while (s != null) {
              result.append(s + "\n");
              s = r.readLine();
         r.close();
         return result.toString();