Answer:
See the code snippet in the explanation section
Explanation:
import java.util.Scanner;
public class Question {
public static void main(String args[]) {
Scanner scan = new Scanner(System.in);
System.out.println("Enter first string: ");
String s1 = scan.nextLine();
System.out.println("Enter second string: ");
String s2 = scan.nextLine();
concatenateString(s1, s2);
}
public static void concatenateString(String firstString, String secondString){
int stringLength = firstString.length() - 1;
String s3 = "";
if (firstString.length() != secondString.length()){
System.out.println("String do not have equal length");
} else {
for(int i = stringLength; i >= 0; i--){
s3 += String.valueOf(firstString.charAt(i)).concat(String.valueOf(secondString.charAt(i)));
}
System.out.println(s3);
}
}
}
