diff --git a/W1/helloworld/HelloWorld.class b/W1/helloworld/HelloWorld.class
deleted file mode 100644
index d968a71..0000000
Binary files a/W1/helloworld/HelloWorld.class and /dev/null differ
diff --git a/W1/helloworld/HelloWorld.java b/W1/helloworld/HelloWorld.java
deleted file mode 100644
index 8b20ecc..0000000
--- a/W1/helloworld/HelloWorld.java
+++ /dev/null
@@ -1,5 +0,0 @@
-public class HelloWorld {
-    public static void main(String[] args) {
-        System.out.println("Hello World!");
-    }
-}
\ No newline at end of file
diff --git a/W1/helloworld/README.md b/W1/helloworld/README.md
deleted file mode 100644
index a8687f1..0000000
--- a/W1/helloworld/README.md
+++ /dev/null
@@ -1,2 +0,0 @@
-# java
-