繼承是一個概念，它允許我們從一個類別存取另一個類別的屬性和行為。被繼承方法和成員變數的類別稱為超類別或父類，而繼承這些方法和成員變數的類別稱為子類別或子類別。在Java中，我們使用「extends」關鍵字來繼承一個類別。
在本文中，我們將討論使用繼承來計算定期存款和定期存款的利息的Java程式。首先，在您的本機機器IDE中建立這四個Java檔案 -
Acnt.java − 這個文件將包含一個抽象類別‘Acnt’，用於儲存帳戶詳情，如利率和金額。它還將具有一個帶有參數‘amnt’的抽象方法‘calcIntrst’，用於計算利率。
FDacnt.java − 它將計算定期存款（FDs）的利率。在其中，'FDacnt'類別將繼承'Acnt'類別並重寫'calcIntrst'方法。
RDacnt.java − 它將計算定期存款（FDs）的利率。在其中，'RDacnt'類別將繼承'Acnt'類別並覆寫'calcIntrst'方法。
Intrst.java − 這個檔案將包含主方法。
public abstract class Acnt{
double intrstRate;
double amnt;
abstract double calcIntrst(double amnt);
}
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;
}
}
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;
}
}
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");
}
}
}
要編譯此程式碼，請鍵入以下命令：javac Intrst.java
# Now to run: java IntrstChoose 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
上述程式是一個選單驅動程式。當我們執行程式時，螢幕上將顯示三個選項。選擇1來計算定期存款的利率，選擇2來計算定期存款的利率。
我們使用了層次繼承的概念來計算定期存款和定期存款的利息。類別“Acnt”被其兩個子類別“FDacnt”和“RDacnt”繼承。
以上是使用繼承的Java程式來計算定期存款（FDs）和定期存款（RDs）的利息的詳細內容。更多資訊請關注PHP中文網其他相關文章！
