Write File without deleting older data [duplicate]

Answer 1

Use constructor FileWriter(String filename, boolean append) that can instruct the file to be opened in append mode:

FileWriter fw = new FileWriter(file.getAbsoluteFile(), true);
                                                     //^^^^ means append

Answer 2

Try

FileWriter fw = new FileWriter(file, true);

Notes: second param means append; no need for file.getAbsoluteFile(), just File is OK

Answer 3

FileWriter takes a boolean argument which specifies whether to overwrite or not.

Try this :

FileWriter fw = new FileWriter(file.getAbsoluteFile(),true);

also visit :

http://docs.oracle.com/javase/6/docs/api/java/io/FileWriter.html#FileWriter%28java.io.File,%20boolean%29

Answer 4

open the file in append mode . like

PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("outfilename", true)));