loops - How to sort and rearrange the file data in Java? -


i have txt file saved in format:

806pyznmnaw4h0wh8fywdq 0 0 0 0 0 1 0  bvu13gyouwhejpum2xjiqq 0 0 0 1 0 0 0  kduecqnk0mrjh9hcyhdkuw 1 0 1 0 0 0 0  806pyznmnaw4h0wh8fywdq 1 0 1 0 0 0 0  bvu13gyouwhejpum2xjiqq 0 1 1 1 1 0 0  tvct2yt3bllpu2crut0zjw 1 0 0 1 0 0 0  806pyznmnaw4h0wh8fywdq 1 1 1 0 0 0 0  9ify25dk87s5_u2ehk0_rg 0 0 0 1 0 0 0  bvu13gyouwhejpum2xjiqq 0 1 0 1 0 0 0  806pyznmnaw4h0wh8fywdq 1 0 0 0 0 0 0  zk0sniea8ju2ik0mw8ccrq 0 0 0 0 1 0 0  amuyug7kfwj7rcbt-elwrq 0 0 0 1 0 0 0

now need loop through input file , save sorted , rearranged output file based on first encoded value can occur more once in input file? e.g. in example file, have 806pyznmnaw4h0wh8fywdq more once in random places.

this far tried: private static final string path = "newuserfeature.txt";

public static void main(string[] args) {     list<string> list = new arraylist<string>();     list<string> uniquelist = new arraylist<string>();     try {          scanner unique = new scanner(new filereader(path));          while (unique.hasnextline()) {             string userunique = unique.nextline();             uniquelist.add(userunique);         }          iterator<string> = uniquelist.iterator();          while (it.hasnext()) {             string user = it.next();             int = 0;             int b = 0;             int c = 0;             int d = 0;             int e = 0;             int f = 0;             int g = 0;              iterator<string> it2 = list.iterator();             while (it2.hasnext()) {                 string[] y = it2.next().tostring().split(" ");                 if (user.equalsignorecase(y[0])) {                     int a1 = integer.parseint(y[1]);                     int b1 = integer.parseint(y[2]);                     int c1 = integer.parseint(y[3]);                     int d1 = integer.parseint(y[4]);                     int e1 = integer.parseint(y[5]);                     int f1 = integer.parseint(y[6]);                     int g1 = integer.parseint(y[7]);                      if (a1 == 1) {                         = a1;                     }                     if (b1 == 1) {                         b = b1;                     }                     if (c1 == 1) {                         c = c1;                     }                     if (d1 == 1) {                         d = d1;                     }                     if (e1 == 1) {                         e = e1;                     }                     if (f1 == 1) {                         f = f1;                     }                  }              }             system.out.println(user + " " + + " " + b + " " + c + " " + d                     + " " + e + " " + f + " " + g + "\n");         }      } catch (filenotfoundexception e) {         e.printstacktrace();     } }

if sorting lines first field happens string, can do:

path oldfile = paths.get("/path/to/my/file"); path newfile = paths.get("/path/to/my/newfile");  list<string> lines = files.readalllines(oldfile); collections.sort(lines); files.write(newfile, lines);

which:

1: load lines in list of strings,
2: sort string (which want @ end of day)
3: store lines in file

as doing string sorting first field, don't need break down each line columns.


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