第十次作业

• 一、题目

编写一个应用程序，模拟中介和购房者完成房屋购买过程。

共有一个接口和三个类：

• Business—— 业务接口
• Buyer —— 购房者类
• Intermediary—— 中介类
• Test —— 主类 

 

二、代码

Test1.java

package cn;

import java.util.*;
public class Test1 {
	 public static void main(String[] args) {
	        // TODO Auto-generated method stub
	        System.out.println("请输入房屋的价格");
	        Scanner reader = new Scanner(System.in);
	        double price=reader.nextDouble();
	        Buyer buyer=new Buyer("lisa");  
	        intermediary A=new intermediary(buyer); //创建对象
	        buyer.buying(price);  
	        A.buying(price);
	        A.charing(price);
	 
	
	 }
}

　　Buyer.java

package cn;

public class Buyer implements Business{
	String name;
	Buyer(String name){
		this.name=name;
		
	}
	public void buying(double price){
		System.out.print("住宅的标价"+price);
	}
	

}

　　Business.java

package cn;

public interface  Business {
double RATIO = 0.022;
double TAX= 0.03;
void buying(double price);

}

　　

intermediary .java

package cn;

public class intermediary {
Buyer buyer;
intermediary(Buyer buyer){
	this.buyer=buyer;
	
}
public void buying (double price){
	System.out.println(buyer.name+"所需要支付的中介费"+price*Business.RATIO+"和交纳的契税"+price*Business.TAX);
}
	 public void charing(double price){
	        System.out.println("房屋中介所需要收取的中介费"+price*Business.RATIO+"和交纳的契税"+price*Business.TAX);
	    }
	
}

　　三、结果

 

 

题目二：

输入5个数，代表学生成绩，计算其平均成绩。当输入值为负数或大于100时，通过自定义异常处理进行提示。

二、代码

package vb;

public class Myexception extends Exception{
    private double exceptnumber;
    Myexception(double a){
        exceptnumber = a;
        
    }
    public String toString(){
        return "自定义异常";
        
    }

}

package vb;
import java.util.Scanner;
public class Test {
    static void makeExcept(int a)throws Myexception{   //声明异常
        if(a<0||a>100)
            throw new Myexception(a);   
    }
 
public static void main(String[] args)
{
        // TODO Auto-generated method stub
    int sum=0;
    int average;
    try
    {
            for(int i=0;i<=5;i++)
            {
            Scanner reader = new Scanner(System.in);
            int a=reader.nextInt();
            makeExcept(a);
            sum+=a;
            }
            average = sum / 5;
            System.out.println("平均成绩为"+average);
    }
    catch(Myexception e)           
    {
        System.out.println(e);
    }
}
 
}

三 、结果