用extjs4.2语法定义一个类

我正在尝试学习ExtJS4.2，在定义类和创建对象时，在语法和跟踪方面，我确实需要一些帮助。需要帮忙吗

Ext.define('Student', {
    name: 'unnamed',
    getName: function() {
        alert('Student name is ' + this.name);
    },
    constructor: function(studentName) {
        if (studentName) this.name = studentName;
    },
    statics: {
        staticMethod: function() {
            alert("This is static method of student class");
        }
    }
}

);

//create an object using 'new'
var student1 = new Student('ABC');
student1.getName();

//create an object using Ext.create
var student2 = Ext.create('Student', 'XYZ');
student2.getName();

//create an object using className.create()
var student3 = Student.create('123');
student3.getName();

//call static method by className.staticMethodName()
Student.staticMethod();

---

对代码进行一些注释，以便您更好地理解：

// Class Student definition
Ext.define('Student', {
    name: 'unnamed',        // a basic string property
    getName: function() {   // a basic function to display a message with the name
        alert('Student name is ' + this.name);
    },

    constructor: function(studentName) {    // The constructor function with the name of the student as parameter
        if (studentName) this.name = studentName;   // If the name is given then assign it to the instance
    },

    statics: {      // Begin of static functions declaration

        staticMethod: function() {  // a static function called "staticMethod"
            alert("This is static method of student class");
        }
    }               // End of static functions declaration
});
// End of class definition

//create an object using 'new' with the name "ABC"
var student1 = new Student('ABC');
student1.getName(); // Should display a message alert with text: "Student name is ABC"

//create an object using Ext.create
var student2 = Ext.create('Student', 'XYZ');    // The second parameter should be ignored
student2.getName(); // Should display a message alert with text: "Student name is Student"

//create an object using className.create()
var student3 = Student.create('123');
student3.getName(); // Should display a message alert with text: "Student name is 123"

//call static method by className.staticMethodName()
Student.staticMethod(); // call the static function declared in Student.
                        // This does not need any class instance

---

你现在的问题不是很清楚。你要问的代码是什么？@Evantimboli这不是我的代码，这是一个示例代码，我正在寻求帮助，如果可能有人可以跟踪我这个示例代码。我将不胜感激。因为我对这个概念有一个大致的概念，但是我想深入了解代码的细节，所以我会确保我完全理解它。