diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..0abed45
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,9 @@
+{
+    "java.completion.filteredTypes": [
+        "com.sun.*",
+        "sun.*",
+        "jdk.*",
+        "org.graalvm.*",
+        "io.micrometer.shaded.*"
+    ]
+}
\ No newline at end of file
diff --git a/src/main/java/info/istlab/dp/dp1/SingletonTest.java b/src/main/java/info/istlab/dp/dp1/SingletonTest.java
index 0e4afb4..009c3ae 100644
--- a/src/main/java/info/istlab/dp/dp1/SingletonTest.java
+++ b/src/main/java/info/istlab/dp/dp1/SingletonTest.java
@@ -1,5 +1,11 @@
 package info.istlab.dp.dp1;
 
+import java.awt.Desktop;
+import java.awt.DisplayMode;
+import java.awt.GraphicsEnvironment;
+import java.io.IOException;
+import java.net.URI;
+import java.net.URISyntaxException;
 import java.util.Calendar;
 import java.util.Date;
 
@@ -27,6 +33,22 @@
         SingletonTest.wait(5);
         Singleton single2 = Singleton.getOnlyOne();
         System.out.println(single2.toString());
+
+        // Other examples
+        // Desktop.getDesktop()
+        Desktop dp = Desktop.getDesktop();
+        try {
+            dp.browse(new URI("https://istlab.info/"));
+        } catch (IOException | URISyntaxException e) {
+            e.printStackTrace();
+        }
+
+        // GraphicsEnvironment
+        GraphicsEnvironment genv = GraphicsEnvironment.getLocalGraphicsEnvironment();
+        DisplayMode dm = genv.getDefaultScreenDevice().getDisplayMode();
+        System.out.println("Main Display width:"+dm.getWidth()+" height:"+dm.getHeight());
+
+        // Runtime rt = Runtime.getRuntime();
     }
 
     public static void wait(int sec) {