diff --git a/.devcontainer.json b/.devcontainer.json
new file mode 100644
index 0000000..bfbeb0d
--- /dev/null
+++ b/.devcontainer.json
@@ -0,0 +1,3 @@
+{
+    "image": "mcr.microsoft.com/devcontainers/java:21"
+}
\ No newline at end of file
diff --git a/.vscode/extensions.json b/.vscode/extensions.json
new file mode 100644
index 0000000..add4f4e
--- /dev/null
+++ b/.vscode/extensions.json
@@ -0,0 +1,5 @@
+{
+    "recommendations": [
+        "vscjava.vscode-java-pack"
+    ]
+}
\ No newline at end of file
diff --git a/Exercise.java b/Exercise.java
index 1b17113..b801dcf 100644
--- a/Exercise.java
+++ b/Exercise.java
@@ -1,6 +1,5 @@
 import java.util.ArrayList;
 import java.util.Collections;
-import java.util.Comparator;
 
 public class Exercise {
 
@@ -13,14 +12,7 @@ public static void main(String[] args) {
     coordinates.add(new Coordinate(6, 8));
     coordinates.add(new Coordinate(1, 9));
 
-    Collections.sort(
-        coordinates,
-        new Comparator<Coordinate>() {
-          @Override
-          public int compare(Coordinate c1, Coordinate c2) {
-            return Integer.valueOf(c1.getY()).compareTo(c2.getY());
-          }
-        });
+    Collections.sort(coordinates, (c1, c2) -> Integer.valueOf(c2.getX()).compareTo(c1.getX()));
 
     for (Coordinate c : coordinates) {
       System.out.println(c + ": " + c.getDistanceToOriginPoint());