阅读下列说明和Java代码,将应填入(n)处的字句写在答题纸的对应栏内。

【说明】

生成器( Builder)模式的意图是将一个复杂对象的构建与它的表示分离,使得同样的构建过程可以创建不同的表示。图6-1所示为其类图。

【Java代码】

import java.util.*；

class Product {

private String part A;

private String part B;

public Product__(6)__{}

public void setPartA(String s){ partA=s;}

public void setPartB(String s){ partB=s;}

}

interface Builder{

public (1);

public void buildPartB__(7)__;

public (2);

}

class ConcreteBuilder1: implements Builder{

private Product product;

public ConcreteBuilder1__(8)__{product=new Product__(9)__; }

public void buildPartA__(10)__{ （3）("Component A");}

public void buildPartB__(11)__{ （4）("Component B");}

public Product getResult__(12)__{ return product;}

}

class ConcreteBuilder2 implements Builder{

∥代码省略

}

class Director {

private Builder builder;

public Director(Builder builder){this.builder=builder;}

public void construct__(13)__{

（5）

∥代码省略

}

}

class Test{

public static void main(String[]args){

Director director1=new Director(new ConcreteBuilder1__(14)__);

director1.construct__(15)__;

}

}