One Edit Distance

One Edit Distance string

Given two strings S and T, determine if they are both one edit distance apart.

One Edit Distance Solution

``````public class OneEditDistance {
public boolean isOneEditDistance(String s, String t) {
//iterate through the length of the smaller string
for(int i = 0; i < Math.min(s.length(), t.length()); i++) {
//if the current characters of the two strings are not equal
if(s.charAt(i) != t.charAt(i)) {
//return true if the remainder of the two strings are equal, false otherwise
if(s.length() == t.length()) {
return s.substring(i + 1).equals(t.substring(i + 1));
} else if(s.length() < t.length()) {
//return true if the strings would be the same if you deleted a character from string t
return s.substring(i).equals(t.substring(i + 1));

} else {
//return true if the strings would be the same if you deleted a character from string s
return t.substring(i).equals(s.substring(i + 1));
}
}
}

//if all characters match for the length of the two strings check if the two strings' lengths do not differ by more than 1
return Math.abs(s.length() - t.length()) == 1;
}
}``````