DOCSP-26555: update quickstart (#311)

* DOCSP-26555: update quickstart

Author: Chris Cho

source/includes/quick-start/code-snippets/QuickStart.java

@@ -10,17 +10,23 @@
 import com.mongodb.client.MongoCollection;
 import com.mongodb.client.MongoDatabase;
 
-public static void main( String[] args ) {
+public class QuickStart {
+    public static void main( String[] args ) {
 
-    // Replace the uri string with your MongoDB deployment's connection string
-    String uri = "<connection string uri>";
+        // Replace the placeholder with your MongoDB deployment's connection string
+        String uri = "<connection string uri>";
 
-    try (MongoClient mongoClient = MongoClients.create(uri)) {
-        MongoDatabase database = mongoClient.getDatabase("sample_mflix");
-        MongoCollection<Document> collection = database.getCollection("movies");
+        try (MongoClient mongoClient = MongoClients.create(uri)) {
+            MongoDatabase database = mongoClient.getDatabase("sample_mflix");
+            MongoCollection<Document> collection = database.getCollection("movies");
 
-        Document doc = collection.find(eq("title", "Back to the Future")).first();
-        System.out.println(doc.toJson());
+            Document doc = collection.find(eq("title", "Back to the Future")).first();
+            if (doc != null) {
+                System.out.println(doc.toJson());
+            } else {
+                System.out.println("No matching documents found.");
+            }
+        }
     }
 }
 // end QuickStart

source/quick-start.txt

@@ -62,8 +62,6 @@ Next, create a file to contain your application called ``QuickStart.java``
 in the base package directory of your project. Use the following sample
 code to run a query on your sample dataset in MongoDB Atlas, replacing the
 value of the ``uri`` variable with your MongoDB Atlas connection string.
-Ensure you replace the "<password>" section of the connection string with
-the password you created for your user that has **atlasAdmin** permissions:
 
 .. literalinclude:: /includes/quick-start/code-snippets/QuickStart.java
    :start-after: begin QuickStart