diff --git a/runtime/classes.jar b/runtime/classes.jar
deleted file mode 100644
index 02a0625..0000000
Binary files a/runtime/classes.jar and /dev/null differ
diff --git a/runtime/foo.class b/runtime/foo.class
index bf77054..c396eee 100644
Binary files a/runtime/foo.class and b/runtime/foo.class differ
diff --git a/runtime/foo.java b/runtime/foo.java
index 5604091..1473dc3 100644
--- a/runtime/foo.java
+++ b/runtime/foo.java
@@ -1,7 +1,10 @@
+
+import bicavm.browser.Window;
+
 public class foo{
     public static void main(String[] args){
-        String hello = "hello";
-        String world = "world";
-        String together = hello + world;
+        String hello = "bicavm";
+        String world = "changed this title";
+        Window.setTitle(hello + world);
     }
 }
\ No newline at end of file
diff --git a/src/internalJNI.jsh b/src/internalJNI.jsh
index 05e841a..8407996 100644
--- a/src/internalJNI.jsh
+++ b/src/internalJNI.jsh
@@ -30,5 +30,8 @@
 	},
 	'java.lang.Double' : {
 		'method doubleToRawLongBits(D)J' : java_lang_Double_doubleToRawLongBits
+	},
+	'bicavm.browser.Window' : {
+		'method setTitle(Ljava/lang/String;)V' : bicavm_browser_Window_setTitle
 	}
  }
\ No newline at end of file
diff --git a/src/javaNativeInterface.js b/src/javaNativeInterface.js
index 73b44ed..ae759a7 100644
--- a/src/javaNativeInterface.js
+++ b/src/javaNativeInterface.js
@@ -44,9 +44,14 @@ function java_lang_Float_floatToRawIntBits(f){
 }
 
 //java.lang.Double doubleToRawLongBits(D)J
-	function java_lang_Double_doubleToRawLongBits(d){
+function java_lang_Double_doubleToRawLongBits(d){
 	var x = new ArrayBuffer(32);
 	new Float64Array(x,0)[0] = d;
 	var y = new Int32Array(x,0);
 	return new math.Long(y[0],y[1]);
-}
\ No newline at end of file
+}
+
+function bicavm_browser_Window_setLocation(s){
+	window.document.title = javaString2JS(s);
+}
+