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原型模式就是利用一个原型对象创建另外的可利用的对象，，而且不需要知道任何创建的细节！
夸张的简历
源代码：
class Resume{ private String name; private String age; private String sex; private String timeArea; private String company; public Resume(String name) { this.name=name; } public void setPersonInfo(String sex,String age) { this.age=age; this.sex=sex; } public void setWorkExperience(String timeArea,String company) { this.timeArea=timeArea; this.company=company; } public void display() { System.out.println(name+" "+sex+" "+age); System.out.println("工作经历:"+timeArea+" "+company); }}public class main { public static void main(String[] args) { Resume a=new Resume("大鸟"); a.setPersonInfo("男", "29"); a.setWorkExperience("1998-2000", "XX公司"); Resume b=new Resume("大鸟"); b.setPersonInfo("男", "29"); b.setWorkExperience("1998-2000", "XX公司"); Resume c=new Resume("大鸟"); c.setPersonInfo("男", "29"); c.setWorkExperience("1998-2000", "XX公司"); a.display(); b.display(); c.display(); }} 三份简历需要三次实例化。这样的客户端代码很麻烦，如果要20份。就需要改20次实例化。如果写错了个字，就要改20次。
（java原型模式有clone（）方法）下面来具体看一下：import java.util.*;import java.lang.*;class Resume implements Cloneable{ private String name; private String age; private String sex; private String timeArea; private String company; public Resume(String name) { this.name=name; } public void setPersonInfo(String sex,String age) { this.age=age; this.sex=sex; } public void setWorkExperience(String timeArea,String company) { this.timeArea=timeArea; this.company=company; } public void display() { System.out.println(name+" "+sex+" "+age); System.out.println("工作经历:"+timeArea+" "+company); } public Resume clone() { try { return(Resume)super.clone(); }catch(CloneNotSupportedException e) { e.printStackTrace(); } return null; }}public class main { public static void main(String[] args) { Resume a=new Resume("大鸟"); a.setPersonInfo("男", "29"); a.setWorkExperience("1998-2000", "XX公司"); Resume b=a.clone(); b.setWorkExperience("1998-2006", "XX企业"); Resume c=a.clone(); c.setPersonInfo("男", "24"); c.setWorkExperience("1998-2000", "XX公司"); a.display(); b.display(); c.display(); }} 优点：
性能很大提高。不用每次都初始化，而是动态获取对象运行时的状态。
缺点：
clone()方法复制字段，如果字段是值类型则逐位复制；如果是引用类型，则复制引用（地址）但不复制引用的对象。浅赋值：被复制对象的所有变量都含有与原来对象相同的值，而所有的对其他对象的引用仍然指向原来的对象。
class WorkExperience{ private String workdate; private String company; public String getWorkdate() { return workdate; } public void setWorkdate(String workdate) { this.workdate = workdate; } public String getCompany() { return company; } public void setCompany(String company) { this.company = company; } }class Resume implements Cloneable{ private String name; private String age; private String sex; private WorkExperience work=new WorkExperience(); public Resume(String name) { this.name=name; } public void setPersonInfo(String sex,String age) { this.age=age; this.sex=sex; } public void setWorkExperience(String workdate,String company) { work.setWorkdate(workdate); work.setCompany(company); } public void display() { System.out.println(name+" "+sex+" "+age); System.out.println("工作经历:"+work.getWorkdate()+" "+work.getCompany()); } public Resume clone() { try { return(Resume)super.clone(); }catch(CloneNotSupportedException e) { e.printStackTrace(); } return null; }}public class main { public static void main(String[] args) { Resume a=new Resume("大鸟"); a.setPersonInfo("男", "29"); a.setWorkExperience("1998-2000", "XX公司"); Resume b=a.clone(); b.setWorkExperience("1998-2006", "YY企业"); Resume c=a.clone(); c.setWorkExperience("1998-2003", "ZZ公司"); a.display(); b.display(); c.display();//浅复制，只修改b和c的工作经历，三个经历都变成了最后设置的工作经历。工作经历类是引用类型。 }} 显示结果：
大鸟 男 29工作经历:1998-2003 ZZ公司大鸟 男 29工作经历:1998-2003 ZZ公司大鸟 男 29工作经历:1998-2003 ZZ公司
没有达到要求，，三次输出的结果都是最后一次设定的值。
深复制把引用的对象的变量指向复制过的新对象，而不是原有的引用对象。
深复制代码：
class WorkExperience implements Cloneable//抽象原型角色{ private String workdate; private String company; public String getWorkdate() { return workdate; } public void setWorkdate(String workdate) { this.workdate = workdate; } public String getCompany() { return company; } public void setCompany(String company) { this.company = company; } public WorkExperience clone() { try { return(WorkExperience)super.clone();> super.clone()浅复制 }catch(CloneNotSupportedException e) { e.printStackTrace(); } return null; } }class Resume implements Cloneable//抽象原型角色{ private String name; private String age; private String sex; private WorkExperience work=new WorkExperience(); public Resume(String name) { this.name=name; } public void setPersonInfo(String sex,String age) { this.age=age; this.sex=sex; } public void setWorkExperience(String workdate,String company) { work.setWorkdate(workdate); work.setCompany(company); } public void display() { System.out.println(name+" "+sex+" "+age); System.out.println("工作经历:"+work.getWorkdate()+" "+work.getCompany()); } public Resume clone() { Resume obj=new Resume(name); obj.sex=this.sex; obj.age=this.age; obj.work=work.clone();//引用类型 return obj; }}public class main { public static void main(String[] args) { Resume a=new Resume("大鸟"); a.setPersonInfo("男", "29"); a.setWorkExperience("1998-2000", "XX公司"); Resume b=a.clone(); b.setWorkExperience("1998-2006", "YY企业"); Resume c=a.clone(); c.setWorkExperience("1998-2003", "ZZ公司"); a.display(); b.display(); c.display(); }} 浅复制只克隆按值传递的数据；
深复制除拷贝值之外还复制引用类型。转载地址：http://sxyzi.baihongyu.com/