JavaScript原型继承的小例子

JavaScript原型继承的小例子，可以对比一下和Java的继承体系的区别，其实这是编程语言设计的理念不同。

<script>
	// 父类 Animal
	var Animal = function() {
		this.name = 'animal';
	};

	Animal.prototype = {

		run: function() {
			console.log(this.name + " run....");
		},

		eat: function() {
			console.log(this.name + " eat...");
		}
	}

	var Dog = function() {

		Animal.call(this);

		name = 'dog';

		this.name = name;

	}

	Dog.prototype = Object.create(Animal.prototype);
	Dog.prototype.constructor = Dog;

	// 覆盖
	Dog.prototype.run = function() {
		console.log(this.name + "...run...run...");
	}

	// test

	var animal = new Animal();
	animal.eat(); // animal eat...

	var dog = new Dog();
	dog.eat(); // dog eat...
	dog.run(); // dog...run...run...
</script>