diff --git a/src/main/resources/core/console.js b/src/main/resources/core/console.js
index 5d30d86..84280e0 100644
--- a/src/main/resources/core/console.js
+++ b/src/main/resources/core/console.js
@@ -6,16 +6,16 @@ var log = base.getLog().static;
 var Level = Java.type('java.util.logging.Level');
 var console = {
     log: function () {
-        log.i(arguments.join(' '));
+        log.i(Array.prototype.join.call(arguments, ' '));
     },
     warn: function () {
-        log.w(arguments.join(' '));
+        log.w(Array.prototype.join.call(arguments, ' '));
     },
     error: function () {
-        log.log(Level.SEVERE, arguments.join(' '));
+        log.log(Level.SEVERE, Array.prototype.join.call(arguments, ' '));
     },
     debug: function () {
-        log.d(arguments.join(' '));
+        log.d(Array.prototype.join.call(arguments, ' '));
     }
 };
 global.console = console;
\ No newline at end of file
diff --git a/src/main/resources/kit/reflect.js b/src/main/resources/kit/reflect.js
index 573dfff..e3d10ad 100644
--- a/src/main/resources/kit/reflect.js
+++ b/src/main/resources/kit/reflect.js
@@ -31,9 +31,9 @@ function Reflect(obj) {
         var name = arguments[0];
         var clazzs = Array.prototype.slice.call(arguments, 1);
         try {
-            return this.class.method(name, clazzs);
+            return this.class.getMethod(name, clazzs);
         } catch (ex) {
-            return this.class.declaredMethod(name, clazzs);
+            return this.class.getDeclaredMethod(name, clazzs);
         }
     };
 
@@ -58,20 +58,21 @@ function Reflect(obj) {
     };
 
     this.create = function () {
-        return on(declaredConstructor(this.class, arguments).newInstance(arguments));
+        var param = Array.prototype.slice.call(arguments);
+        return on(declaredConstructor(this.class, param).newInstance(param));
     };
 }
 
 /**
  * Get an array of types for an array of objects
  */
-function types(values) {
+function types(values, def) {
     if (values === null) {
         return [];
     }
     var result = [];
     values.forEach(function (t) {
-        result.push(t === null ? Object.class : t.class)
+        result.push((t === null || def) ? Object.class : t instanceof Class ? t : t.class)
     });
     return result;
 }
@@ -86,8 +87,18 @@ function accessible(accessible) {
     return accessible;
 }
 
-function declaredConstructor() {
-    return accessible(arguments[0].declaredConstructor(arguments.slice(1)));
+function declaredConstructor(clazz, param) {
+    var constructor;
+    try {
+        constructor = clazz.getDeclaredConstructor(types(param));
+    }catch(ex) {
+        try {
+            constructor = clazz.getDeclaredConstructor(types(param, true));
+        }catch(ex) {
+            constructor = clazz.getDeclaredConstructors()[0];
+        }
+    }
+    return accessible(constructor);
 }
 
 function declaredField(clazz, name) {
@@ -95,12 +106,12 @@ function declaredField(clazz, name) {
     // noinspection JSUnresolvedVariable
     while (clazz !== java.lang.Object.class) {
         try {
-            field = clazz.declaredField(name);
+            field = clazz.getDeclaredField(name);
             if (field !== null) {
                 break;
             }
         } catch (e) {
-            clazz = clazz.superclass();
+            clazz = clazz.getSuperclass();
         }
     }
     if (field === null) {
diff --git a/src/main/resources/modules/command.js b/src/main/resources/modules/command.js
index 760d4d3..56d23b6 100644
--- a/src/main/resources/modules/command.js
+++ b/src/main/resources/modules/command.js
@@ -11,9 +11,12 @@ var lookupNames = ref.on(bukkit.plugin.manager).get('lookupNames').get();
 var knownCommands = ref.on(bukkit.plugin.manager).get('commandMap').get('knownCommands').get();
 var PluginCommand = Java.type('org.bukkit.command.PluginCommand');
 
+var Arrays = Java.type('java.util.Arrays')
+
 function create(jsp, name) {
     var cmd = ref.on(PluginCommand).create(name, plugin).get();
     register(jsp, name, cmd);
+    return cmd;
 }
 
 function register(jsp, name, cmd) {
@@ -38,13 +41,21 @@ function register(jsp, name, cmd) {
 //
 //     }
 // };
-
-exports.on = function (plugin, name, exec) {
-    var c = create(plugin, name);
-    if (exec.onCommand) {
-        c.setExecutor(exec);
+/
+exports.on = function (jsp, name, exec) {
+    var c = create(jsp, name);
+    if (exec.cmd) {
+        c.setExecutor(
+            function (sender, cmd, command, args) {
+                return exec.cmd(sender, command, args);
+            }
+        );
     }
-    if (exec.onTabComplete) {
-        c.setTabCompleter(exec);
+    if (exec.tab) {
+        c.setTabCompleter(
+            function (sender, cmd, command, args) {
+                return Arrays.asList(exec.tab(sender, command, args));
+            }
+        );
     }
 };
\ No newline at end of file
diff --git a/src/main/resources/plugins/hello.js b/src/main/resources/plugins/hello.js
index 2bc1940..22b585f 100644
--- a/src/main/resources/plugins/hello.js
+++ b/src/main/resources/plugins/hello.js
@@ -5,6 +5,7 @@
 /*global Java, base, module, exports, require*/
 
 var event = require('modules/event');
+var cmd = require('modules/command');
 var join;
 
 var description = {
@@ -26,6 +27,15 @@ function enable() {
             event.player.sendMessage(require("plugins/ext/papi").$(event.player, "§a欢迎来到 §bMiaoScript §a的世界! 当前在线: %server_online%"));
         }, 10);
     });
+    cmd.on(module.exports, 'hello', {
+        cmd: function (sender, command, args) {
+            console.log(command, args);
+            return true;
+        },
+        tab: function (sender, command, args) {
+            return 'test';
+        }
+    });
 }
 
 function disable() {