Implement isIsomorphic method in IsomorphicStrings class

Author: harshithasudhakar

Strings/IsomorphicStrings.java

@@ -0,0 +1,27 @@
+class IsomorphicStrings {
+    public boolean isIsomorphic(String s, String t) {
+        Map<Character, Character> map1 = new TreeMap<>();
+        Map<Character, Character> map2 = new TreeMap<>();
+
+        if(s.length() != t.length()){
+            return false;
+        }
+
+        for(int i = 0; i<s.length(); i++){
+            if(!map1.containsKey(s.charAt(i))){
+                map1.put(s.charAt(i), t.charAt(i));
+            }
+            if(map1.get(s.charAt(i)) != t.charAt(i)){
+                return false;
+            }
+            if(!map2.containsKey(t.charAt(i))){
+                map2.put(t.charAt(i), s.charAt(i));
+            }
+            if(map2.get(t.charAt(i)) != s.charAt(i)){
+                return false;
+            }
+        }
+
+        return true;
+    }
+}