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代码清单6-8 计算机书籍接口
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public interface IComputerBook extends IBook{
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//计算机书籍是有一个范围
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public String getScope();
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}
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很简单,计算机书籍增加了一个方法,就是获得该书籍的范围,同时继承IBook接口,毕竟计算机书籍也是书籍,其实现如代码清单6-9所示。
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代码清单6-9 计算机书籍类
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public class ComputerBook implements IComputerBook{
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private String name;
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private String scope;
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private String author;
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private int price;
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public ComputerBook(String_name,int_price,String_author,String_scope){
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this.name=_name;
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this.price=_price;
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this.author=_author;
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this.scope=_scope;
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}
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public String getScope(){
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return this.scope;
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}
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public String getAuthor(){
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return this.author;
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}
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public String getName(){
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