How to delete a particular line from a file?

Java delete line from text file?

• Hi Friends, I am writing a java program, which is writting to a text file in this form: aaa : bbb : ccc :ddd eee : ggg : ggg: hhh kkk : ppp : qqq: ccc now i want to delete middle line with eee: ggg : ggg: hhh and move the last line to move one step up. how can i do that.. Thanks

• Answer:

  How about this public static void copyAndRemoveLine(Reader _in, Writer _out, int line) { try { BufferedReader in = new BufferedReader(_in); PrintWriter out = new PrintWriter(_out); String s = in.readLine(); for(int i=1; s!=null; s=in.readLine(), i++) { if(i != line) out.println(s); } in.close(); out.close(); } catch (Exception e) { e.printStackTrace(); } } public static void copyAndRemoveLine(String in, String out, int line) { try { copyAndRemoveLine(new FileReader(in), new FileWriter(out), line); } catch(Exception e) { e.printStackTrace(); } } public static void main(String[] args) { copyAndRemoveLine("file", "file_copy", line); }