diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 6edbb9b..36c7636 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -147,3 +147,8 @@
  - Place: Surat, Gujarat, India
  - Bio: Coder, Android Developer
  - GitHub: [Ujjwal0501](https://github.com/Ujjwal0501)
+
+#### Name: [Adam Růžička](https://github.com/666hellmaster)
+ - Place: Prague, Czech Republic
+ - Bio: becoming a backend developer
+ - GitHub: [666hellmaster](https://github.com/666hellmaster)
diff --git a/Program/Java/hello_world_666hellmaster.java b/Program/Java/hello_world_666hellmaster.java
new file mode 100644
index 0000000..617b36d
--- /dev/null
+++ b/Program/Java/hello_world_666hellmaster.java
@@ -0,0 +1,9 @@
+//language: Java
+//author: 666hellmaster
+
+
+public class hello_world_666hellmaster {
+    public static void main(String[] args) {
+        System.out.println("Hello world!");
+    }
+}
\ No newline at end of file