(Java) I need help making to strings equal each other in length ,but I feel like i did my loop wrong

Question

This is my loop I am doing this for the Vigneer Cypher so I am trying to make the strings equal each other in length
So i created this loop
for(int i = 0;i<plainText.length();i++,j++){
if(j == bellasoStr.length())
j = 0;
if(bellasoStr.length()==plainText.length())
break;
bellasoStr+=bellasoStr.charAt(j);

}
However I dont know if I formated or created the loop correct

Answer 1

If you define j = 0 then your code should work.

https://code.sololearn.com/cB1676wGVWLk/?ref=app

Answer 2

thanks