随笔分类 -  《设计模式之禅》读书笔记

摘要：public abstract class HummerModel { public HummerModel() { } public abstract void start(); public abstract void stop(); public abstract void alarm(); public abstract void engineBoom(); public void run() { start(); engineBoom(); alarm(); ... 阅读全文

摘要：首先看一下UML图：我们从上往下一个一个实现：public interface Human { public void getColor(); public void talk(); public void getSex();}public abstract class AbstractWhiteHuman implements Human { @Override public void getColor() { System.out.println("白色"); } @Override public void talk() { ... 阅读全文

摘要：public interface Human { public void getColor(); public void talk();}public class BlackHuman implements Human { @Override public void getColor() { System.out.println("黑色"); } @Override public void talk() { System.out.println("黑人"); }}public class WhiteHu... 阅读全文

摘要：情景：只有一个皇帝（Emperor），三个臣子（Minister）向一个皇帝汇报。public class Emperor { private static final Emperor emperor = new Emperor(); private Emperor() { } public static Emperor getInstance() { return emperor; } public static void say() { System.out.print... 阅读全文