Why can't I replace 2nd String?

Question

import java.util.*;
public class Program
{
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
String s1=sc.nextLine();
String s2=sc.nextLine();
String lm="January February March Apirl May June July August September October November December";
String nm="123456789101112";
String[]lm1=lm.split(" ");
String[]nm1=nm.split("");
for(int i=0;i<12;i++){
s1=s1.replaceAll(lm1[i],nm1[i]);
s2=s2.replaceAll(lm1[i],nm1[i]);
}

Answer 1

The string array <nm1> appears to be the issue here. It was splitted by blank string, means it doesn't have "10", "11" and "12".

Set a delimiter for splitting e,g. using a comma; to get a valid month index string array

String nm = "1,2,3,4,5,6,7,8,9,10,11,12";
...
String[] nm1 = nm.split( "," );

P.S. Prefer to attach code bit link inatead of raw text next time ~ especially when the code is rather long. Your raw text code is truncated from character limits ...