java - putting variables in text file then get them back in an array -


i have done of project still have one. have take data user , put 3 variables (profit2012, profit2013, profit2014), store them in text file separated commas. after want take them out of file draw them on graph (canvas). how can that?

private static int year() {     scanner input = new scanner(system.in);     int selectedyear;     system.out.println("choose 1 of following years: ");     system.out.println("[1] 2012 - - [2] 2013 - - [3] 2014");     selectedyear = input.nextint();      if (selectedyear == 1) {         int expenses2012;         system.out.println("please enter expenses year : ");         expenses2012 = input.nextint();         int sales2012;         system.out.println("please enter sales year : ");         sales2012 = input.nextint();          int profit2012 = sales2012 - expenses2012;      }     if (selectedyear == 2) {         int expenses2013;         system.out.println("please enter expenses year : ");         expenses2013 = input.nextint();         int sales2013;         system.out.println("please enter sales year : ");         sales2013 = input.nextint();          int profit2013 = sales2013 - expenses2013;      }     if (selectedyear == 3) {         int expenses2014;         system.out.println("please enter expenses year : ");         expenses2014 = input.nextint();         int sales2014;         system.out.println("please enter sales year : ");         sales2014 = input.nextint();          int profit2014 = sales2014 - expenses2014;      }try {         main(null);     } catch (ioexception e) {         // todo auto-generated catch block         e.printstacktrace();     } }

as see, have variables, , graph ready, not know how put them in text file read array use them height of 3 rectangles (separating them in places of commas).

use objectoutputstream , write collections object file. later on cen collection same object via objectinputstream


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