Java 抽象类

最新推荐文章于 2024-12-07 22:41:56 发布

原创最新推荐文章于 2024-12-07 22:41:56 发布 · 548 阅读

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CC 4.0 BY-SA版权

本文介绍了一个简单的银行存款利息计算系统，通过定义抽象基类Bank并继承实现ChinaBank和NongBank两个具体银行类来计算不同条件下的存款利息。系统考虑了存款金额是否超过20000元这一阈值，并据此调整计算方式。

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Bank

abstract class Bank {
	protected double savedMoney; //存款
	protected int year ;			//存款年数（注意类型）
	protected double income; 		//存款利息
	protected double inRate ;
	protected double current;//存款利率
	public void setRate(double in){
		//设置存款利率
		inRate=in;
	}
	public void setcurrent(double in){
		//设置存款利率
		current=in;
	}
	public double computerIncome(){
		//计算存款利息
		income=year*inRate*savedMoney;
		return income;
	}

}

ChinaBank

public class ChinaBank extends Bank {
	private double year;
	private double current;
	public ChinaBank(){}
	public ChinaBank(double savedMoney,double year){
		this.savedMoney=savedMoney;
		this.year=year;
	}
	public void setcurrent(double in){
		//设置存款利率
		current=in;
	}
	public double computerIncome(){
		int n=(int)year;
		if(savedMoney>20000)
		    income=n*inRate*savedMoney+(n-year)*current*((n*inRate+1)*savedMoney)+200;
		else
			income=n*inRate*savedMoney+(n-year)*current*((n*inRate+1)*savedMoney);
		return  income;
	}

}

NongBank

public class NongBank extends Bank{
	private double year;
	private double current;
	public NongBank(){}
	public NongBank(double savedMoney,double year){
		this.savedMoney=savedMoney;
		this.year=year;
	}
	public void setcurrent(double in){
		//设置存款利率
		current=in;
	}
	public double computerIncome(){
		int n=(int)year;
		if(savedMoney>20000)
		    income=n*inRate*savedMoney+(n-year)*current*((n*inRate+1)*savedMoney)+300;
		else
			income=n*inRate*savedMoney+(n-year)*current*((n*inRate+1)*savedMoney);
		return  income;
	}

}

BankText

import java.util.*;
public class BankText {
	public static void main(String[] args) {		
		Scanner in=new Scanner(System.in);
		System.out.print("请输入存款年数：");
		double year=in.nextDouble();
		System.out.print("请输入存款数：");
		double savemony=in.nextDouble();
		Bank xiaoli=new ChinaBank(savemony,year);
		xiaoli.setRate(0.02);
		xiaoli.setcurrent(0.01);
		System.out.print("利息为：");
		System.out.println(xiaoli.computerIncome());
		System.out.print("请输入存款年数：");
		double year1=in.nextDouble();
		System.out.print("请输入存款数：");
		double savemony1=in.nextDouble();
		xiaoli=new NongBank(savemony1,year1);
		xiaoli.setRate(0.02);
		xiaoli.setcurrent(0.005);
		System.out.print("利息为：");
		System.out.println(xiaoli.computerIncome());
		
	}

}