diff --git a/Java/String/Optimal Partition of String b/Java/String/Optimal Partition of String
new file mode 100644
index 00000000..b11b58ec
--- /dev/null
+++ b/Java/String/Optimal Partition of String	
@@ -0,0 +1,19 @@
+class Solution {
+    public int partitionString(String s) {
+         int ans = 1;
+        HashSet<Character> st = new HashSet<>();
+        for(int i=0;i<s.length();i++){
+ 		  // Insert Till we find duplicate element.
+            if(!st.contains(s.charAt(i))){
+                st.add(s.charAt(i));
+            }
+            else{
+			 // If we found duplicate char then increment count and clear set and start with new set.
+                ans++;
+                st.clear();
+                st.add(s.charAt(i));
+            }
+        }
+        return ans;
+    }
+}