摘要：对于【软件设计师】软考考试而言，试题无疑是最重要的学习资料之一。在软考备考过程中，吃透试题、掌握试题所考知识点、熟悉试题的出题思路，对我们提升分数的效果是最明显的，通过对试题的反复练习，还可以查漏补缺。今天，给大家带来【2016年11月 软件设计师 下午题】部分试题的详解，一起来看看吧~



1、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】   某发票（lnvoice）由抬头（Head）部分、正文部分和脚注（Foot）部分构成。现采用装饰（Decorator）模式实现打印发票的功能，得到如图6-1所示的类图。 【java代码】class invoice{public void printInvoice(){           System.out.println ( "This is the content of the invoice!");    }}class Decorator extends Invoice {  protected Invoice ticket;  public Decorator(lnvoice t){        ticket = t;}   publicvoid printInvoice(){        if(ticket != null)                          （1）       ; }  }class HeadDecorator extends Decorator{      public HeadDecorator(lnvoice t){          super(t);}    public void printInvoice (){           Systent.out.println( "This is the header of the invoice! ");                          （2）         ;    }} class FootDecorator extends Decorator {   public FootDecorator(Invoice t){   super(t);}    public void printlnvoice(){                      （ 3）        ;            Systent.out.println( "This is the footnote of the invoice! ");    }}Class test {   public static void main(String[] args){    Invoice t =new Invioce();    Invoice ticket;    ticket=     （4）       ;    ticket.printInvoice();    Systent.out.println(“------------------“);    ticket=       （5）       ;    ticket.printInvoice();   }}程序的输出结果为：   This is the header of the invoice!   This is the content of the invoice!   This is the footnote of the invoice!    ----------------------------   This is the header of the invoice!   This is the footnote of the invoice!
答案:

见解析

答题解析:

（1） ticket.printInvoice()

（2） ticket.printInvoice()

（3） ticket.printInvoice()

（4） new FootDecorator(new
HeadDecorator(t))

（5） new FootDecorator(new
HeadDecorator(new Decorator(null)))

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