第7次作业--访问权限、对象使用 题目1修改版（实现封装（大概））（自用）

rectangleV2.java：

package factorial;

public class rectangleV2 {
    private int length;
    private int width;
    private int area;

    

    
    public rectangleV2(int length, int width) {
        this.setLength(length);
        this.setWidth(width);
    }
    //封装，长和宽为可读可写，面积无法修改
    public int getLength() {
        return length;
    }
    public void setLength(int length) {
        if(length <= 0) {
            length = 1;
        }else {
        this.length = length;
        }
    }
    
    
    
    public int getWidth() {
        return width;
    }
    public void setWidth(int width) {
        if(width <=0) {
            width = 1;
        }else {
        this.width = width;
        }
    }
    
    public int getArea() {
        area = length * width;
        return area;
    }
    public void show() {
        System.out.println("面积为："+ this.getArea());
        
    }
    
}

 

Volumev2.java：

package factorial;
import factorial.rectangleV2;

public class Volumev2 {
    private int high;
    private int volume;
    private int area;

    
    
    public Volumev2(int high, rectangleV2 area) {   //重点
        this.setHigh(high);
        this.area = area.getArea();
    }
    public int getHigh() {
        return high;
    }
    public void setHigh(int high) {
        if(high <= 0)
        {
            high = 1;
        }else {
        this.high = high;
        }
    }
    
    
    public int getVolume() {
        volume =area * high;
        return volume;
    }
    
    public void show() {
        System.out.println("体积为："+ this.getVolume());
        
    }

    
}

 

TestVolume.java：

package factorial;
import java.util.*;

public class TestVolume {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        for(int i = 0; i < 3; i++)
        {
            System.out.println("请输入长宽高：");
            int length = input.nextInt();
            int width = input.nextInt();
            int high = input.nextInt();
            rectangleV2 area = new rectangleV2(length,width);
            Volumev2 volume = new Volumev2(high,area);
            volume.show();
        }
        
        
    }
    
    
}

 

运行结果：