day7_work1_printer

作业

面向接口编程思想的打印机:打印机,(黑.彩色墨盒),(a4.b5纸张)

1. 定义接口:墨盒, 纸张
2. 按接口开发类
3. 将五个类按需要组装并使用

类图:

代码:

墨盒接口:

public interface Ink{
    public String getColor();
}

黑色墨盒类:

public class BlackInk implements Ink{
    @Override
    public String getColor() {
    	return "黑色墨盒";
    }
}

彩色墨盒类:

public class ColorInk implements Ink{
    @Override
    public String getColor() {
    	return "彩色墨盒";
    }
}

纸张接口:

public interface Paper{
    public String getSize();
}

A4纸类:

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

B5纸类:

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

打印机类:

public class Printer {
    private Paper paper;
    private Ink ink;
    private String brand;
    
    public Printer(String brand) {
        this.brand = brand;
    }
    
    public print(String words) {
    	System.out.println(brand + "牌打印机正在使用" + ink.getColor() + "和" + paper.getSize() + "打印:");
        System.out.println(words);
    }
    
    public void setPaper(Paper paper) {
        this.paper = paper;
    }
    
    public Paper getPaper() {
        return paper;
    }
    
	public void setInk(Ink ink) {
        this.ink = ink;
    }
    
    public Ink getInk() {
        return ink;
    }
    public String getBrand() {
        return brand;
    }
}

客户类:

public class Customer {
    public static void main(String[] args) {
        //采购
    	Paper a4Paper = new A4Paper();
        Paper b5Paper = new B5Paper();
        Ink blackInk = new BlackInk();
        Ink colorInk = new ColorInk();
        Printer printer = new Printer("海尔");
        //组装
        printer.setPaper(a4paper);
        printer.setInk(blackInk);
        //使用
        printer.print("呜呼");    
    }
}

运行结果