diff -r 644d9b9c97ed -r 4eabcac368d2 samples/console.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/samples/console.js	Thu May 21 18:44:51 2015 +0530
@@ -0,0 +1,134 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Oracle nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * Simple Web Console-like support for Nashorn. In addition to
+ * Web console object methods, this console add methods of
+ * java.io.Console as well. Note:not all web console methods are 
+ * implemented but useful subset is implemented.
+ *
+ * See also: https://developer.mozilla.org/en/docs/Web/API/console
+ */
+
+
+if (typeof console == 'undefined') {
+
+(function() {
+    var LocalDateTime = Java.type("java.time.LocalDateTime");
+    var System = Java.type("java.lang.System");
+    var jconsole = System.console();
+
+    // add a new global variable called "console"
+    this.console = {
+    };
+
+    function addConsoleMethods() {
+        // expose methods of java.io.Console as an extension
+        var placeholder = "-*-";
+        // put a placeholder for each name from java.lang.Object
+        var objMethods = Object.bindProperties({}, new java.lang.Object());
+        for (var m in objMethods) {
+            console[m] = placeholder;
+        }
+
+        // bind only the methods of java.io.Console
+        // This bind will skip java.lang.Object methods as console
+        // has properties of same name.
+        Object.bindProperties(console, jconsole);
+
+        // Now, delete java.lang.Object methods
+        for (var m in console) {
+            if (console[m] == placeholder) {
+                delete console[m];
+            }
+        }
+    }
+
+    addConsoleMethods();
+
+    function consoleLog(type, msg) {
+        // print type of message, then time.
+        jconsole.format("%s [%s] ", type, LocalDateTime.now().toString());
+        if (typeof msg == 'string') {
+            jconsole.format(msg + "\n", Array.prototype.slice.call(arguments, 2));
+        } else {
+            // simple space separated values and newline at the end
+            var arr = Array.prototype.slice.call(arguments, 1);
+            jconsole.format("%s\n", arr.join(" "));
+        }
+    }
+
+    console.toString = function() "[object Console]";
+
+    // web console functions
+
+    console.assert = function(expr) {
+        if (! expr) {
+            arguments[0] = "Assertion Failed:"; 
+            consoleLog.apply(console, arguments);
+            // now, stack trace at the end
+            jconsole.format("%s\n", new Error().stack);
+        }
+    };
+
+    // dummy clear to avoid error!
+    console.clear = function() {};
+
+    var counter = {
+        get: function(label) {
+            if (! this[label]) {
+                return this[label] = 1;
+            } else {
+                return ++this[label];
+            }
+        }
+    };
+   
+    // counter 
+    console.count = function(label) {
+        label = label? String(label) : "<no label>";
+        jconsole.format("%s: %d\n",label, counter.get(label).intValue());
+    }
+
+    // logging
+    console.error = consoleLog.bind(jconsole, "ERROR");
+    console.info = consoleLog.bind(jconsole, "INFO");
+    console.log = console.info;
+    console.debug = console.log;
+    console.warn = consoleLog.bind(jconsole, "WARNING");
+
+    // print stack trace
+    console.trace = function() {
+        jconsole.format("%s\n", new Error().stack);
+    };
+})();
+
+}