javascript 面向对象学习笔记一
? javascript 面向对象基础知识:
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//给object对象定义属性;var obj = new Object;obj.x = "100";obj.y = "200";//定义一个类;function Foo(){this.id = 300;this.name = "zhouhaitao";}//定义一个数组;var array = new Array();//属性测试;function testProperty(){alert(obj.x);alert(obj.y);var foo = new Foo();alert(foo.id);alert(foo.name);array.push("数组值1");array.push("数组值2");array.push("数组值3");/** * 循环; */for(var inx in array){alert(array[inx]);}}//Object对象的inObj设置为1;Object.prototype.inObj = 1;//定义A类;function A(){//给属性设置值为2;this.inA = 2;}//给A类的inAproto属性设置为3;A.prototype.inAProto = 3;B.prototype = new A();B.prototype.constructor = B;//定义B类;function B(){//给B类属性设置值为4;this.inB = 4;this.firstMethod = function (num1,num2){var count = num1+num2;return count;};}B.prototype.inBroto = 5;x = new B;document.writeln(x.inObj+","+x.inA+","+x.inAProto+","+x.inB+","+x.inBroto);//打印function pirintMethod(){//调用方法;var count = x.firstMethod(1000,1000);alert(count);//定义一个新的方法;B.secondMethod = function(msg){return msg;};var msg = B.secondMethod("Hello");alert("这是创建一个新的方法:"+msg);}//定义一个C类;function C(){this.x = 1;this.eat = function(){this.x=4;return this.x;};}//给C类定义吃的方法;C.prototype.eat2=function(){var y = new C().eat();this.x = (y+=1);};//定义一个D类;function D(){this.x = 1;this.eat = function(){this.x=5;};}//给D类定义一个吃的方法;D.prototype.eat2 = function(){this.x+=2;};c = new C();d = new D();c.eat2();d.eat();document.writeln("<br/>"+c.x+","+d.x+"</br>");//给E类定义私有成员;function E(){var num = 100;//定义getter方法;this.getNum = function(){return num;};//定义setter方法;this.setNum = function(number){num = number;};};//测试;function privateProperty(){var e = new E();//设置值;e.setNum(500);//获取值;var result =e.getNum();alert("私有属性:"+result);myObjMethod();}//定义一个空对象;var myobj = {};myobj.name = "zhang san";//定义一个get方法;myobj.getName = function(){return this.name;};//定义一个person对象;var person={id:100,name:'Test',age:30,address:function(x){return x;}};?