Java程序继承使用计算FD和RD的利息

继承是一种允许我们访问一个类的属性和行为的另一个类的概念。被继承方法和成员变量的类被称为超类或父类，继承这些方法和成员变量的类被称为子类或子类。在Java中，我们使用“extends”关键字来继承一个类。

在本文中，我们将讨论使用继承计算FD和RD利息的Java程序。首先，在本地机器ide中创建这四个Java文件-

* Acnt.java-此文件将包含一个抽象类“Acnt”，用于存储帐户详细信息，例如利率和金额。它还将具有一个带“amnt”参数的抽象方法“calcIntrst”来计算利率。

* FDacnt.java-它将计算固定存款（FD）的利率。其中，“FDacnt”类将继承“Acnt”类并覆盖“calcIntrst”方法。

* RDacnt.java-它将计算定期存款（RD）的利率。其中，“RDacnt”类将继承“Acnt”类并覆盖“calcIntrst”方法。

* Intrst.java-此文件将包含主要方法。

示例

Acnt.java

public abstract class Acnt{
    double intrstRate;
    double amnt; 
    abstract double calcIntrst（double amnt）;
}

FDacnt.java

import java.util.*;
public class FDacnt extends Acnt {
   double FDintrstRate;
   double FDAmnt;
   int period;
   int age;
   double Gen, SenCitizen;
   Scanner input = new Scanner(System.in);
   @Override
   double calcIntrst（double amnt）{
      this.FDAmnt = amnt;
      System.out.println（"Enter your FD days"）;
      period = input.nextInt();
      System.out.println("Enter the age of account holder ");
      age = input.nextInt();
      if（amnt <10000000）{
         if（period> = 7 && period <= 14）{
            Gen = 0.0450;
            SenCitizen = 0.0500;
         } else if（period> = 15 && period <= 29）{
            Gen = 0.0470;
            SenCitizen = 0.0525;
         } else if（period> = 30 && period <= 45）{
            Gen = 0.0550;
            SenCitizen = 0.0600;
         } else if（period> = 45 && period <= 60）{
            Gen = 0.0700;
            SenCitizen = 0.0750;
         } else if（period> = 61 && period <= 184）{
            Gen = 0.0750;
            SenCitizen = 0.0800;
         } else if（period> = 185 && period <= 365）{
            Gen = 0.0800;
            SenCitizen = 0.0850;
         }
         FDintrstRate =（age <50）？Gen：SenCitizen;
      } else {
         if（period> = 7 && period <= 14）{
            intrstRate = 0.065;
         } else if（period> = 15 && period <= 29）{
            intrstRate = 0.0675;
         } else if（period> = 30 && period <= 45）{
            intrstRate = 0.00675;
         } else if（period> = 45 && period <= 60）{
            intrstRate = 0.080;
         } else if（period> = 61 && period <= 184）{
            intrstRate = 0.0850;
         } else if（period> = 185 && period <= 365）{
            intrstRate = 0.10;
         }
      }
      return FDAmnt * FDintrstRate;
   }
}

RDacnt.java

import java.util.*;
public class RDacnt extends Acnt{
   double RDIntrstRate;
   double RDamnt;
   int periods;
   double monthlyAmnt;
   double Gen, SenCitizen;
   Scanner input = new Scanner(System.in);
   @Override
   double calcIntrst（double amnt）{
      this.RDamnt = amnt;
      System.out.println（"Enter your RD months"）;
      periods =input.nextInt();
      System.out.println("Enter the age of account holder");
      int age =input.nextInt();
      if（periods> = 0 && periods <= 6）{
         Gen = .0750;
         SenCitizen = 0.080;
      } else if（periods> = 7 && periods <= 9）{
         Gen = .0775;
         SenCitizen = 0.0825;
      } else if（periods> = 10 && periods <= 12）{
         Gen = .0800;
         SenCitizen = 0.0850;
      } else if（periods> = 13 && periods <= 15）{
         Gen = .0825;
         SenCitizen = 0.0875;
      } else if（periods> = 16 && periods <= 18）{
         Gen = .0850;
         SenCitizen = 0.0900;
      } else if（periods> = 22）{
         Gen = .0875;
         SenCitizen = 0.0925;
      }
      RDIntrstRate =（age <50）？Gen：SenCitizen;
      return RDamnt * RDIntrstRate;
   }
}

Intrst.java

import java.util.*;
public class Intrst{
   public static void main(String[] args){
      Scanner sc = new Scanner(System.in);
      System.out.println("Choose from the Options: " + "\n1." + " FD Interest" + " \n2." + " RD Interest"
      + "\n3." + " Exit");
      int choice = sc.nextInt();
      switch (choice){
         case 1:
         FDacnt fds = new FDacnt();
         System.out.println("Enter your FD Amount");
         double fAmnt = sc.nextDouble();
         System.out.println("Interest gained on your FD Amount is: " + fds.calcIntrst(fAmnt));
         break;
         case 2:
         RDacnt rds = new RDacnt();
         System.out.println("Enter your RD amount");
         double RAmnt = sc.nextDouble();
         System.out.println("Interest gained on your RD Amount is: " + rds.calcIntrst(RAmnt));
         break;
         default:
         System.out.println("Choose correct choice");
      }
   }
}

要编译此代码，请键入命令：javac Intrst.java 现在要运行：java Intrst

输出

Choose from the Options: 
1. FD Interest
2. RD Interest
3. Exit
1
Enter your FD Amount
56000
Enter your FD days
325
Enter the age of account holder 
32
Interest gained on your FD Amount is: $ 4480.0