So I was solving a question from a coding website that required me to replace ? with an a or b provided there are no two consecutive a... I have tried a lot and this is the code that i have written. although the code seems correct to my knowledge, whenever I run this code the output is same as the input itself. No changes are made to it.
Example case: input: ?ababa?b? output: babababba
input: ababb?b output:ababbab
The input has to be wither a,b or ? The output must be such that it has the highest precedence in dictionary.
However whatever input i give i get the same output. If I give ?ab as input I get the same as output please help me
package Beginner;
import java.util.Scanner;
public class ExplRuin {
public static void main(String args[]){
String s;
Scanner in = new Scanner(System.in);
s = in.nextLine();
if(s.length()==1){
if(s.equals("?"))
s.replace("?", "a");
} else
{
if(s.toString().startsWith("?")){
if(s.contains("?b"))
s.replace("?b","ab");
else
if(s.contains("?a"))
- s.replace("?a", "ba");
}
if(s.endsWith("?")){
if(s.contains("a?"))
s.replace("a?", "ab");
else
if(s.contains("b?"))
s.replace("b?","ba");
}
if(s.contains("?a")||s.contains("a?")){
s.replace("?", "a");
}
else{
s.replace("?", "a");
}
}
System.out.print(s);
}
}
