diff --git a/String-Operation/Pratik/StringOp.java b/String-Operation/Pratik/StringOp.java
new file mode 100644
index 0000000..8ef0420
--- /dev/null
+++ b/String-Operation/Pratik/StringOp.java
@@ -0,0 +1,38 @@
+import java.util.*;
+class StringOp{
+  public static void main(String[] args) {
+    String input="";
+    String dup="";
+    String dup1="";
+    int count = 0;
+    int i,j;
+    Scanner s = new Scanner(System.in);
+    System.out.println("Enter the String");
+    input = s.nextLine();
+
+    System.out.println("Entered String is: "+input);
+
+            for(i=0;i<input.length();i++){
+              for(j=i+1;j<input.length();j++){
+                  if(input.charAt(i) != input.charAt(j)){
+
+                  }else{
+                    count++;
+                    dup += String.valueOf(input.charAt(i));
+                  }
+              }
+            }
+            if(count == 0){
+              System.out.println("String has a unique character");
+            }else{
+              System.out.println("String has a duplicate character");
+            }
+
+            if(dup != ""){
+            System.out.println("duplicate characters in String are: "+dup);
+          }else{
+            System.out.println("There's no duplicate characters in String");
+          }
+  }
+
+}