diff --git a/practice_projects/src/substrings.java b/practice_projects/src/substrings.java
new file mode 100644
index 0000000..b8a154a
--- /dev/null
+++ b/practice_projects/src/substrings.java
@@ -0,0 +1,42 @@
+import java.util.Scanner;
+
+public class substrings {
+
+    public static void main(String[] args){
+
+        Scanner scanner = new Scanner(System.in);
+
+
+        // .substring() is a method used to extract a portion of a string.
+        // You use it by giving a start and end position.
+        // Example: string.substring(start, end)
+
+        while (true) {
+            // Have user enter their email
+            System.out.print("Enter an email: ");
+            String email = scanner.nextLine();
+
+            // Check if its a valid email (Contains @ symbol)
+            if(email.contains("@")){
+                // find the index position of the @ symbol
+                int index = email.indexOf("@");
+
+                // find the domain address of their email
+                String domain = email.substring(index + 1);
+
+                String username = email.substring(0, index);
+
+                System.out.println("Your username is " + username);
+                System.out.println("Your email domain is " + domain);
+                break;
+
+            } else {
+                System.out.println("Please enter a valid email address!\n");
+                continue;
+            }
+        }
+
+        scanner.close();
+
+    }
+}