打印机

打印机类

package cn.print;
//打印机类
public class Printer {
        private Ink ink;
        private Paper paper;
        public void print() {
            System.out.println("正在使用"+ink.getClours()+"的墨盒在"+paper.getSize()+"纸上打印信息");
        }
        
        public Ink getInk() {
            return ink;
        }
        public void setInk(Ink ink) {
            this.ink = ink;
        }
        public Paper getPaper() {
            return paper;
        }
        public void setPaper(Paper paper) {
            this.paper = paper;
        }
}

墨盒接口

package cn.print;

public interface Ink {
    public  String getClours();
}

彩色类

package cn.print;

public class ClourInk implements Ink {
    public String getClours() {
        return "彩色";
    }
}

黑白类

package cn.print;

public class GrayInk implements Ink {
        public String getClours() {
            return "灰色";
        }
}

纸接口

package cn.print;

public interface Paper {
    public String getSize();
}

A4类

package cn.print;

public class A4Paper implements Paper{
        public String getSize() {
            return "A4";
        }
}

B5类

package cn.print;

public class B5Paper implements Paper {
        public String getSize() {
            return "B5";
        }
}

测试类

package cn.print;

public class Test {
        public static void main(String[] args) {
            Printer printer = new Printer();
            Paper paper = new A4Paper();
            Ink ink =  new ClourInk();
            printer.setInk(ink);
            printer.setPaper(paper);
            printer.print();
        }
}