JAVA 接口的应用_java的接口应用-优快云博客

本文介绍了一个简单的银行存款利息计算程序，包括中国银行和人民银行两个实例。程序使用抽象类Bank作为基类，并通过子类ChinaBank和Rmbank实现具体银行的利息计算方法。Rmbank还实现了佣金计算。

/*
*程序的版权和版本声明部分：
*程序的版权和版本声明部分：
*Copyright（c）2013，烟台大学计算机学院学生
*All rights reserved.
*文件名称：
*作者：尚振伟
*完成日期：2014年11月6日
*版本号：v0.1
*对任务及求解方法的描述部分：
*输入描述：无
*问题描述:
*程序输入：
*程序输出：
*问题分析：
*算法设计：
*我的程序：
*/
public abstract class Bank {
	protected int savedMoney;
	protected int year;
	protected double income;
	protected double inRate;
	protected int getSavedMoney() {
		return savedMoney;
	}
	public void setSavedMoney(int savedMoney) {
		this.savedMoney = savedMoney;
	}
	public int getYear() {
		return year;
	}
	public void setYear(int year) {
		this.year = year;
	}
	public double getIncome() {
		return income;
	}
	public void setIncome(double income) {
		this.income = income;
	}
	public double getInRate() {
		return inRate;
	}
	public void setInDate(double inRate) {
		this.inRate = inRate;
	}
	public Bank(){
		
	}
	public Bank(int savedMoney,int year,double inRate){
		this.savedMoney=savedMoney;
		this.year=year;
		this.inRate=inRate;
	}
	public void setRate(double in){
		this.inRate=in;
	}
	public abstract double computerIncome();
}

public class Chinabank extends Bank {
	private double year;
	private double inRate1;
	public void setRate1(double in1){
		this.inRate1=in1;
	}
	public Chinabank(){
		
	}
	public Chinabank(int savedMoney,double year,double inRate,double inRate1){
		this.savedMoney=savedMoney;
		this.year=year;
		this.inRate=inRate;
		this.inRate1=inRate1;
	}
	public double computerIncome(){
		income=(int)this.year*this.getInRate()*this.getSavedMoney()+(year-(int)year)*inRate1*this.getSavedMoney();
		return income;
	}
}

public class Rmbank extends Bank implements Commision{
	private double year;
	private double inRate1;
	public Rmbank(){
		
	}
	public Rmbank(int savedMoney,double year,double inRate,double inRate1){
		this.savedMoney=savedMoney;
		this.year=year;
		this.inRate=inRate;
		this.inRate1=inRate1;
	}
    public int calculate(){
    	int tc;
    	if(this.getSavedMoney()<=1000){
    		tc=0;
    	}
    	else if(this.getSavedMoney()>1000||this.getSavedMoney()<=1000){
    		tc=100;
    	}
    	else{
    		tc=500;
    	}
    	return tc;
    }
	@Override
	public double computerIncome() {
		// TODO Auto-generated method stub
		income=(int)this.year*this.getInRate()*this.getSavedMoney()+(year-(int)year)*inRate1*this.getSavedMoney()+this.calculate();
		return income;
	}

}

public interface Commision {
	public abstract int calculate();
}

public class Test {
	public static void main(String[] args) {
		Bank aaa=new Chinabank(2000,2.5,0.02,0.01);
		System.out.println("在中国银行的存款利息为："+aaa.computerIncome());
		Bank bbb=new Rmbank(2000,2.5,0.02,0.01);
		System.out.println("在人民银行的存款利息加提成为："+bbb.computerIncome());
	}
}

结果展示: