打印机

打印机类

 1 package cn.print;
 2 //打印机类
 3 public class Printer {
 4         private Ink ink;
 5         private Paper paper;
 6         public void print() {
 7             System.out.println("正在使用"+ink.getClours()+"的墨盒在"+paper.getSize()+"纸上打印信息");
 8         }
 9         
10         public Ink getInk() {
11             return ink;
12         }
13         public void setInk(Ink ink) {
14             this.ink = ink;
15         }
16         public Paper getPaper() {
17             return paper;
18         }
19         public void setPaper(Paper paper) {
20             this.paper = paper;
21         }
22 }

墨盒接口

1 package cn.print;
2 
3 public interface Ink {
4     public  String getClours();
5 }

彩色类

1 package cn.print;
2 
3 public class ClourInk implements Ink {
4     public String getClours() {
5         return "彩色";
6     }
7 }

黑白类

1 package cn.print;
2 
3 public class GrayInk implements Ink {
4         public String getClours() {
5             return "灰色";
6         }
7 }

纸接口

1 package cn.print;
2 
3 public interface Paper {
4     public String getSize();
5 }

A4类

1 package cn.print;
2 
3 public class A4Paper implements Paper{
4         public String getSize() {
5             return "A4";
6         }
7 }

B5类

1 package cn.print;
2 
3 public class B5Paper implements Paper {
4         public String getSize() {
5             return "B5";
6         }
7 }

测试类

 1 package cn.print;
 2 
 3 public class Test {
 4         public static void main(String[] args) {
 5             Printer printer = new Printer();
 6             Paper paper = new A4Paper();
 7             Ink ink =  new ClourInk();
 8             printer.setInk(ink);
 9             printer.setPaper(paper);
10             printer.print();
11         }
12 }