diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 823bc676c..7ca247f1d 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -37,7 +37,8 @@
 				"mechatroner.rainbow-csv",
 				"alexcvzz.vscode-sqlite",
 				"Orta.vscode-jest",
-				"firsttris.vscode-jest-runner"
+				"firsttris.vscode-jest-runner",
+				"richardwillis.vscode-spotless-gradle"
 			],
             "settings": {
                 "terminal.integrated.defaultProfile.linux": "zsh",
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 2f4c92279..98e9db5d6 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -15,4 +15,9 @@
     "[javascriptreact]": {
         "editor.defaultFormatter": "esbenp.prettier-vscode"
     },
+    "[java]": {
+        "spotlessGradle.format.enable": true,
+        "editor.defaultFormatter": "redhat.java",
+  },
+
 }
diff --git a/lesson_12/structs_java/structs_app/src/main/java/com/codedifferently/lesson12/ListNode.java b/lesson_12/structs_java/structs_app/src/main/java/com/codedifferently/lesson12/ListNode.java
index bcd6bd73f..7fea3ca0a 100644
--- a/lesson_12/structs_java/structs_app/src/main/java/com/codedifferently/lesson12/ListNode.java
+++ b/lesson_12/structs_java/structs_app/src/main/java/com/codedifferently/lesson12/ListNode.java
@@ -1,10 +1,12 @@
 package com.codedifferently.lesson12;
 
 public class ListNode {
+
   int val;
   ListNode next;
 
-  ListNode() {}
+  ListNode() {
+  }
 
   ListNode(int val) {
     this.val = val;
diff --git a/lesson_13/maps_java/desired_file.txt b/lesson_13/maps_java/desired_file.txt
new file mode 100644
index 000000000..e69de29bb