java工厂方法模式
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public class Applicaiton { public static void main(String[] args) { PenCore penCore; Creator ballpen =new BlueBallpen(); penCore=ballpen.getpPenCore(); penCore.writeWord("你好很高兴认识你"); ballpen=new RedBallPen(); penCore=ballpen.getpPenCore(); penCore.writeWord("HOW ARE YOU"); }}?