diff --git a/Java/Isomorphic.java b/Java/Isomorphic.java
new file mode 100644
index 0000000..106d7fc
--- /dev/null
+++ b/Java/Isomorphic.java
@@ -0,0 +1,27 @@
+package org.problems.strings;
+
+import java.util.HashMap;
+
+public class Isomorphic {
+
+    public static void main(String[] args) {
+        System.out.println(isIsomorphic("abc","aaa"));
+    }
+    public static boolean isIsomorphic(String s, String t) {
+
+        HashMap<Character, Character> mp1 = new HashMap<>();
+        HashMap<Character, Character> mp2 = new HashMap<>();
+        if (s.length() != t.length())
+            return false;
+        for (int i = 0; i < s.length(); i++) {
+            if (mp1.containsKey(s.charAt(i)) || mp2.containsKey(t.charAt(i))) {
+                if ( (mp1.get(s.charAt(i)) != null && mp1.get(s.charAt(i))!=t.charAt(i)) || (mp2.get(t.charAt(i))!=null && mp2.get(t.charAt(i))!=s.charAt(i)))
+                    return false;
+            } else {
+                mp1.put(s.charAt(i), t.charAt(i));
+                mp2.put(t.charAt(i), s.charAt(i));
+            }
+        }
+        return true;
+    }
+}