Import java. io. bufferedreader; import java. io. bufferedwriter; public class datasort { public static void main (string [] args) { file fin = // input file file fout = // create an out file // java fileinputstream class obtains input bytes from a file fileinputstream fis = new fileinputstream(fin); // buffering characters so as to provide for the efficient reading of characters, arrays, and lines bufferedreader in = new bufferedreader(new inputstreamreader(fis)); // declare an array in-line, ready for the sort string aline; arraylist al = new arraylist (); int i = 0; while ((aline = in. = null) { // set the sort for values is greater than 0 collections. sort(al); // sorted content to the output file { system. out. println(s); } // close the 2 files } } add code as indicated in the comments.