bank.java

有一个接口,用抽象类实现它的部分功能,再用实现类继承抽象类,实现其它没实现的接口方法

package cn.edu.csu.oo.abstractoper.templetePattern;

public abstract class Bank {
  //利息
  protected double interest;
  //本金
  private double fund;
  public double calculateInterest(){
    interest = getFund()*getInterestRate();
    System.out.println(interest);
    return interest;
  }
  public double getFund(){
    return fund;
  }
  public void setFund(double fund){
    this.fund = fund;
  }
  
  public abstract double getInterestRate();
}