设计模式

来源：互联网发布：php获取表单数据并输出编辑：程序博客网时间：2024/05/10 19:01

单利模式

     ###懒汉式###    public class Human{          public staic Human human=null;          public Human getHuman(){           if(human==null){           human=new Human();             }             return human;           }     }     ###饿汉式###   public class Human{          public staic Human human=new Human();          public Human getHuman(){             return human;           }     }

工厂模式

        //创建实例的工厂     public interface FruitsFactory{         Fruit getFruit();         }     public class AppleFactory implements FruitsFactory{          public Fruit getFruit(){             return new Apple();           }         }     public class BananaFactory implements FruitsFactory{         public Fruit getFruit(){           return new Banana();          }         }         //具体创建的实例对象     public interface Fruit{        void Color();        }      public class Apple implements Fruit{       public void getColor(){       System.out.println("The apple's color is red!");          }         }      public class Banana implements Fruit{       public void getColor(){       System.out.println("The banana's color is yellow!");          }         }     //测试类     public class Test{      public static void main(String args[]){       FruitsFactory fruitsFactory=new AppleFactory();       Apple apple=fruitsFactory.getFuit();       apple.getColor();       FruitsFactory fruitsFactory=new BananaFactory();       Banana banana=fruitsFactory.getFuit();       banana.getColor();       }      }

结果：

The apple’s color is red!

The banana’s color is yellow!

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