2010. 8. 6. 17:59 flex
[05-D2] static, interface, extends
[05-D2] static, interface, extends
1. static 함수
- [new -- ActionScript Class]
>>>>> src/test/Test.as
package www.test{
import mx.controls.Alert;
public class Test{
public var cnt:int = 0; // 인스턴스 변수 선언
public static var staticCnt:int = 0; // 스태틱 변수 선언
// 생성자
public function Test() {
cnt = cnt + 1;
staticCnt = staticCnt + 1;
}
public function instFunc():void { // 멤머 메서드
mx.controls.Alert.show("instance 변수: " + cnt);
}
public static function staticFunc():void { // 스태틱 메서드
mx.controls.Alert.show("static 변수: " + staticCnt);
}
}
}
>>>> src/TestUI.mxml
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" height="387">
<mx:Script>
<![CDATA[
import www.test.*;
private function instanceDisplay():void {
var obj1:Test = new Test();
obj1.instFunc();
var obj2:Test = new Test();
obj2.instFunc();
var obj3:Test = new Test();
obj3.instFunc();
}
private function staticDisplay():void {
Test.staticFunc();
}
]]>
</mx:Script>
<mx:Button label="instance변수" click="instanceDisplay()"/>
<mx:Button label="static 변수" click="staticDisplay()"/>
</mx:Application>
4. implements: interface
※ 추상 클래스는 ActionScript 3.0에서는 지원하지 않음
>>>>> Printer.as
package test.inter{
public interface Printer{
function start():String;
function print():String;
function stop():String;
}
}
>>>>> Hp.as
package test.inter
{
// 인터페이스 구현
public class Hp implements Printer
{
public function Hp(){
}
public function start():String
{
return "인쇄를 시작합니다.";
}
public function print():String
{
return "인쇄 중입니다...........";
}
public function stop():String
{
return "인쇄를 종료합니다.";
}
public function scanner():String{
return "스캔을 시작합니다.";
}
}
}
>>>>> Cannon.as
>>>>> Epson.as
>>>>> InterfaceTest.mxml
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:Script>
<![CDATA[
import mx.controls.*;
import test.inter.*;
public function execute():void{
var msg:String = "";
var obj:Printer = null;
txaMsg.text = "";
obj = new Hp();
msg += obj.start()+"\n";
msg += obj.print()+"\n";
msg += obj.stop()+"\n";
txaMsg.text = msg;
}
public function typeChange():void{
var msg:String = "";
var obj:Printer = null; // 인터페이스 선언
txaMsg.text = "";
// var obj:Printer = new Hp();
obj = new Hp(); // Hp 객체 생성
// obj.
var hp:Hp = Hp(obj); // 형변환, (Hp)obj;
msg += hp.scanner() + "\n";
msg += hp.start() + "\n";
var hp2:Hp = obj as Hp;
hp2.scanner();
// var hp3:Hp = (Hp)obj; // ERROR
txaMsg.text = msg;
}
]]>
</mx:Script>
<mx:TextArea x="10" y="10" width="463" height="373" id="txaMsg" fontSize="18"/>
<mx:Button x="10" y="391" label="Interface 테스 트" id="btnExecute" fontSize="18" click="execute()"/>
<mx:Button x="202" y="391" label="객체 형변 환" id="btnType" fontSize="18" click="typeChange()"/>
</mx:Application>
5. extends: 상속, 다중 상속 안됨
>>>>> IT.as
package test.extend{
public class IT{
public function IT(){
}
public function itIntroduce():String{
return "▶ IT는 하드웨어 소프트웨어로 구성";
}
}
}
>>>>> SW.as
>>>>> DB.as
>>>>> extendsTest.mxml
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:Script>
<![CDATA[
import mx.controls.*;
import test.extend.*;
public function execute():void{
var msg:String = "";
var obj:DB = new DB();
txaMsg.text = "";
msg += obj.itIntroduce() + "\n";
msg += obj.swIntroduce() + "\n";
msg += obj.dbIntroduce() + "\n";
msg += obj.dbDevelop() + "\n";
txaMsg.text = msg;
}
]]>
</mx:Script>
<mx:TextArea x="10" y="10" width="457" height="403" id="txaMsg" fontSize="18"/>
<mx:Button x="10" y="421" label="상속 테스트" id="btnExtends" fontSize="18" click="execute()"/>
</mx:Application>
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