java - Checking if file exists, if so, dont create new file and append instead -

private void saveformactionperformed(java.awt.event.actionevent evt) {     name = nameformtext.gettext();     surname = surnameformtext.gettext();     age = integer.parseint(ageformtext.gettext());     stadium = stadiumformtext.gettext();      venues fix = new venues();     fix.setname(name);     fix.setsurname(surname);     fix.setage(age);     fix.setstadium(stadium);      file outfile;     fileoutputstream fstream;     objectoutputstream ostream;      try {         outfile = new file("output.data");         fstream = new fileoutputstream(outfile);         ostream = new objectoutputstream(fstream);         ostream.writeobject(fix);         joptionpane.showmessagedialog(null, "file written successfully");         ostream.close();     } catch (ioexception e) {         system.out.println(e);     }  }    

this have far. ideas on append file if it's created?

you have first check if file exists before, if not create new one. learn how append object objectstream take @ question.

        file outfile = new file("output.data");         fileoutputstream fstream;         objectoutputstream ostream;         try {             if(!outfile.exists()) outfile.createnewfile();             fstream = new fileoutputstream(outfile);             ostream = new objectoutputstream(fstream);             ostream.writeobject(fix);             joptionpane.showmessagedialog(null, "file written successfully");             ostream.close();         } catch (ioexception e) {             system.out.println(e);         }