javascript对象的理解
从代码中体会javascript中的对象：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>js demo</title>
<script type="text/javascript" charset="utf-8">
// 定义一个方法，这样只有触发事件调用
function myFunction() {
var person = {
fname: "Bill",
lname: "Gates",
age: 56,
// 理解为Java对象里面的静态方法和属性，所以不用实例化就可以访问获取
setFname:function(name) {
this.fname = name;
console.info(this.fname);
}
};
console.info(person);
// 定义一个数组
var persons = new Array();
person.setFname("Guxingzhe")
persons.push(person);
persons.push(person);
persons.push(person);
console.info(persons);
function User(name,age){
contry = "China";//私有不可访问
this.name = name;//公有可以访问（判断是否带this）
this.age = age;
this.canFly = false;
this.eat = function() {
console.info("吃饭");
}
}
// 通过原型函数，继承覆盖toLocaleString方法
User.prototype.toLocaleString = function(){
return this.name + ":" + this.age + ":" + this.canFly;
};
var user=new User();
user.eat();
console.info(user);
console.info ((user.name="guxingzhe") + ":" + (user.age=12) + ":" + user.canFly);
var users = new Array();
users.push(new User("guxingzhe1", 12));
users.push(new User("guxingzhe2", 12));
users.push(new User("guxingzhe3", 12));
console.info(users.toLocaleString());//类似java里面的toString
for(var i = 0; i < users.length; i++) {
console.info(users[i].name);
}
}
// 定义一个小车对象，里面有属性及方法
// 本人理解为Java中对象里定义类静态方法，所以可以直接访问不用实例化在访问属性
var car = {
pointX:10,
pointY:100,
run:function() {
console.info("run method");
},
stop:function() {
console.info("stop method");
},
start:function() {
console.info("start method");
},
point:function() {
// 记得加this,不然会解析器认为是方法里面的属性，识别为未定义
console.info(this.pointX + ":" + this.pointY);
}
}
car.run();
car.stop();
car.start();
car.point();
// 对象方法
function people(firstname, lastname, age, eyecolor) {
this.firstname = firstname;
this.lastname = lastname;
this.age = age;
this.eyecolor = eyecolor;
}
// 实例化一个对象方法
people = new people("John", "Doe", 50, "blue");
// 打印对象方法的属性
console.info(people.firstname + " is " + people.age + " years old.");
</script>
</head>
<body>
<button onclick="myFunction()">触发</button>
</body>
</html>
调试环境火狐+firebug.
运行效果如下：
