ABAP测试:测试结果:sub: 1public class SuperClass { private int mSuperX; public SuperClass() { setX(99); } public void setX(int x) { mSuperX = x; }} public class SubClass extends SuperClass { private int mSubX = 1; public SubClass() {} @Override public void setX(...【阅读全文】
原文:http://www.oodesign.com/chain-of-responsibility-pattern.htmlChain of ResponsibilityMotivationIn writing an application of any kind, it often happens that the event generated by one object needs to be handled by another one. And, to make our work even harder, we also happen to...【阅读全文】