为什么一加这段就undefined呢？
就是模仿java里面的ArrayList。 为什么一加这段就undefined呢？
ArrayList.prototype.ensureCapacity = function(iCapacity) {
this.arr = new Array(iCapacity);
};
程序代码：[code=HTML]<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www. <head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Person</title>
<script language="JavaScript">
function ArrayList() {
this.arr = new Array();
this.iListSize = 0;
ArrayList.prototype.ensureCapacity = function(iCapacity) {
this.arr = new Array(iCapacity);
};
ArrayList.prototype.add = function(item) {
this.arr.push(item);
this.iListSize++;
};
ArrayList.prototype.get = function(index) {
return this.arr[index];
};
ArrayList.prototype.size = function() {
return this.iListSize;
};
}
var aL = new ArrayList();
aL.ensureCapacity(3);
aL.add("A");
aL.add("B");
aL.add("C");
for (var i = 0; i < aL.size(); i++) {
alert(aL.get(i));
}
</script>
</head>
<body>
</body>
</html>
先谢斑竹了！！
