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Isomorphic.java
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34 lines (28 loc) · 1.08 KB
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package com.thealgorithms.strings;
import java.util.*;
public class Isomorphic {
public static boolean checkStrings(String s, String t) {
if (s.length() != t.length()) {
return false;
}
// To mark the characters of string using MAP
// character of first string as KEY and another as VALUE
// now check occurence by keeping the track with SET data structure
Map<Character, Character> characterMap = new HashMap<Character, Character>();
Set<Character> trackUinqueCharacter = new HashSet<Character>();
for (int i = 0; i < s.length(); i++) {
if (characterMap.containsKey(s.charAt(i))) {
if (t.charAt(i) != characterMap.get(s.charAt(i))) {
return false;
}
} else {
if (trackUinqueCharacter.contains(t.charAt(i))) {
return false;
}
characterMap.put(s.charAt(i), t.charAt(i));
}
trackUinqueCharacter.add(t.charAt(i));
}
return true;
}
}