Can this code be modified so there are three sorted files merged instead of two.

( To compile: javac xxxxxH2.java )

( To execute: java xxxxxH2 f1.txt f2.txt f3.txt f4.txt )

import java.util.*; import java.io.*; public class xxxxxH1{ // print k integers per line int k = 20; //use a short word for System.out to save typing PrintStream prt = System.out; // print file contents private void prtfile(String fn){ //declare variables int i=0, x; prt.printf(" %s:", fn); try{ Scanner inf = new Scanner(new File(fn)); while (inf.hasNext()) { //read an input from inf x = inf.nextInt(); prt.printf("%3d ", x); i++; if(i % k == 0) prt.printf(" %s:", fn); } // endwhile prt.printf("(count=%d)", i); // close file inf.close(); } catch (Exception e){ prt.printf(" Ooops! Read Error:");} } // end prtfile // complete following method private void merge(String fn1, String fn2, String fn3){ int x, y; try{ // merge two sorted integer files fn1 and fn1 into fn3 prtfile(fn1); // print first sorted file prtfile(fn2); // print second sorted file prt.printf(" \tS T A R T * M E R G I N G "); // open input files F1 & F2 Scanner F1 = new Scanner(new File(fn1)); Scanner F2 = new Scanner(new File(fn2)); // open output file F3 PrintWriter F3 = new PrintWriter(new File(fn3)); // read an input from file F1 x = F1.nextInt(); // read an input from file F2 y = F2.nextInt(); // complete the rest while (F1.hasNext() && F2.hasNext()) { if (x=y)> F3.printf("%4d", x); x = F1.nextInt(); } else { F3.printf("%4d", y); y = F2.nextInt(); } } if (!F1.hasNext()) { while (F2.hasNext()) { F3.printf("%4d", y); y = F2.nextInt(); } } else { while (F1.hasNext()) { F3.printf("%4d", x); x = F1.nextInt(); } } if (x => F3.printf("%4d", x); F3.printf("%4d", y); } else{ F3.printf("%4d", y); F3.printf("%4d", x); } // complete the rest // close all files F1.close(); F2.close(); F3.close(); } catch (Exception e){prt.printf(" Ooops! I/O Error:");} prtfile(fn3); // print final sorted file prt.printf(" \tE N D * M E R G I N G"); } // end merge public static void main(String[] args) throws Exception{ int cnt = args.length; // get no. of arguments if (cnt == 3){ String f1 = args[0]; // get first file name String f2 = args[1]; // get second file name String f3 = args[2]; // get third file name //System.out.printf(" f1=%s, f2=%s, f3=%s, cnt=%d", f1, f2, f3, cnt); // create an instance of xxxxxH1 class xxxxxH1 srt = new xxxxxH1(); srt.merge(f1, f2, f3); //MAKE SURE TO WRITE YOUR NAME IN NEXT LINE System.out.printf(" \tAuthor: xxxxx xxxxx Date: " + java.time.LocalDate.now()); } else System.out.printf(" \tOOOPS Invalid No. of aguments!" + " \tTO Execute: java xxxxxH1 f1.txt f2.txt f3.txt"); } // end main } // end xxxxxH1