面向接口编程开发打印机墨盒：彩色，黑白纸张类型：A4，B5墨盒和纸张都不是打印机厂商提供的打印机厂商要兼容市场上的墨盒，纸张

开发打印机

• 墨盒：彩色，黑白
• 纸张类型：A4，B5
• 墨盒和纸张都不是打印机厂商提供的
• 打印机厂商要兼容市场上的墨盒，纸张

墨盒接口

package org.cc.demo1;

public interface InkBox {
  public String color();
}

黑色

package org.cc.demo1;

public class BlackBox implements InkBox{

	@Override
	public String color() {
		// TODO Auto-generated method stub
		return "黑白墨盒";
	}

}

彩色

package org.cc.demo1;

public class BlackBox implements InkBox{

	@Override
	public String color() {
		// TODO Auto-generated method stub
		return "黑白墨盒";
	}

}

纸张接口

package org.cc.demo1;

public interface Paper {
  public String size();
}

A4

package org.cc.demo1;

public class A4Paper implements Paper{

	@Override
	public String size() {
		// TODO Auto-generated method stub
		return "A4纸张";
	}

	

}

B5

package org.cc.demo1;

public class B5Paper implements Paper{

	@Override
	public String size() {
		// TODO Auto-generated method stub
		return "B5纸张";
	}

	

}

打印机厂商

package org.cc.demo1;

public class Printer {
	public static void print(Paper paper, InkBox inkBox) {
		System.out.println("使用"+inkBox.color()+"在"+paper.size()+"上打印");
	}
}

测试

package org.cc.demo1;

public class Test {
  public static void main(String[] args) {
	Printer.print(new B5Paper(), new ColorfulBox());
	Printer.print(new A4Paper(), new BlackBox());
	
}
}