java设计模式5--原型模式（Prototype）

public interface  Prototype {
    public Object cloneMe() throws CloneNotSupportedException;
} 

public class Cubic implements Prototype, Cloneable{
      double  length, width, height;
      Cubic(double a, double b, double c){
            length = a;
            width = b;
            height = c;
      }
      public Object cloneMe() throws CloneNotSupportedException{
            Cubic object = (Cubic)clone(); 
            return object;
      } 
}

import java.io.*;
public class Goat implements Prototype,Serializable{
       StringBuffer color;
       public void setColor(StringBuffer c){
             color = c;
      }
      public  StringBuffer getColor(){
            return color;
      }
      public Object cloneMe() throws CloneNotSupportedException{ 
            Object object = null;
            try{ 
                   ByteArrayOutputStream outOne = new ByteArrayOutputStream();
                   ObjectOutputStream outTwo = new ObjectOutputStream(outOne);
                   outTwo.writeObject(this);     
                   ByteArrayInputStream  inOne=
                   new ByteArrayInputStream(outOne.toByteArray());
                   ObjectInputStream inTwo = new ObjectInputStream(inOne);
                   object=inTwo.readObject();  
           }
           catch(Exception event){
                   System.out.println(event);
           }
           return object;
      }
}

public class Application {
    public static void main(String[] args) {
        Cubic cubic = new Cubic(12, 20, 66);
        System.out.println("cubic的长、宽和高： ");
        System.out.println(cubic.length + "," + cubic.width + "," + cubic.height);
        try {
            Cubic cubicCopy = (Cubic)cubic.cloneMe();
            System.out.println("cubicCopy的长、宽和高： ");
            System.out.println(cubicCopy.length + "," + cubicCopy.width + "," + cubicCopy.height);
        } catch(CloneNotSupportedException ex){}
        Goat goat = new Goat();
        goat.setColor(new StringBuffer("白色的山羊"));
        System.out.println("goat是" + goat.getColor());
        try {
            Goat goatCopy = (Goat)goat.cloneMe();
            System.out.println("goatCopy是" + goatCopy.getColor());
            System.out.println("goatCopy将自己的颜色改变成黑色");
            goatCopy.setColor(new StringBuffer("黑颜色的山羊"));
            System.out.println("goat仍然是"+ goat.getColor());
            System.out.println("goatCopy是"+ goatCopy.getColor());
        } catch(CloneNotSupportedException ex){}
    }
}