diff -r 000000000000 -r 63be794c1eeb javaquery/demo-calculator/src/main/java/org/apidesign/bck2brwsr/mavenhtml/App.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javaquery/demo-calculator/src/main/java/org/apidesign/bck2brwsr/mavenhtml/App.java	Fri Nov 09 12:06:45 2012 +0100
@@ -0,0 +1,74 @@
+package org.apidesign.bck2brwsr.mavenhtml;
+
+import org.apidesign.bck2brwsr.htmlpage.api.OnClick;
+import org.apidesign.bck2brwsr.htmlpage.api.Page;
+
+@Page(xhtml="Calculator.xhtml")
+public class App {
+    private static final int OP_PLUS = 1;
+    private static final int OP_MINUS = 2;
+    private static final int OP_MUL = 3;
+    private static final int OP_DIV = 4;
+    
+    static double memory = 0;
+    static int operation = 0;
+    
+    
+    
+    @OnClick(id="clear")
+    static void clear() {
+        setValue(0.0);
+    }
+    
+    private static void setValue(double v) {
+        StringBuilder sb = new StringBuilder();
+        sb.append(v);
+        Calculator.DISPLAY.setValue(sb.toString());
+    }
+    
+    private static double getValue() {
+        return Double.parseDouble(Calculator.DISPLAY.getValue());
+    }
+    
+    @OnClick(id="plus")
+    static void plus() {
+        memory = getValue();
+        operation = OP_PLUS;
+        setValue(0.0);
+    }
+    
+    @OnClick(id="minus")
+    static void minus() {
+        memory = getValue();
+        operation = OP_MINUS;
+        setValue(0.0);
+    }
+    
+    @OnClick(id="mul")
+    static void mul() {
+        memory = getValue();
+        operation = OP_MUL;
+        setValue(0.0);
+    }
+    
+    @OnClick(id="result")
+    static void computeTheValue() {
+        switch (operation) {
+            case 0: break;
+            case OP_PLUS: setValue(memory + getValue()); break;
+            case OP_MINUS: setValue(memory - getValue()); break;
+            case OP_MUL: setValue(memory * getValue()); break;
+        }
+    }
+    
+    @OnClick(id={"n0", "n1", "n2", "n3", "n4", "n5", "n6", "n7", "n8", "n9"}) 
+    static void addDigit(String digit) {
+        digit = digit.substring(1);
+        String v = Calculator.DISPLAY.getValue();
+        if ("0".equals(v) || v == null) {
+            Calculator.DISPLAY.setValue(digit);
+        } else {
+            Calculator.DISPLAY.setValue(v + digit);
+        }
+    }
+}