Here is a step-by-step guide on how to create the abstract class Bank with the abstract method getRateOfInterest() and the classes SBI and PNB that override this method:

Step 1: Create the abstract class Bank
```java
public abstract class Bank {
abstract double getRateOfInterest();
}
```
Step 2: Create the class SBI that extends Bank and overrides the method getRateOfInterest()
```java
public class SBI extends Bank {
double principal = 10000; // assuming a principal amount

double getRateOfInterest() {
return (principal * 5) / 100; // calculating 5% of principal
}

void display() {
System.out.println("Interest amount in SBI: " + getRateOfInterest());
}
}
```
Step 3: Create the class PNB that extends Bank and overrides the method getRateOfInterest()
```java
public class PNB extends Bank {
double principal = 10000; // assuming a principal amount

double getRateOfInterest() {
return (principal * 6) / 100; // calculating 6% of principal
}

void display() {
System.out.println("Interest amount in PNB: " + getRateOfInterest());
}
}
```
Step 4: Create a main class to test the SBI and PNB classes
```java
public class Main {
public static void main(String[] args) {
SBI sbi = new SBI();
sbi.display();

PNB pnb = new PNB();
pnb.display();
}
}
```
When you run the Main class, it will display the interest amount for SBI and PNB.

Question

Here is a step-by-step guide on how to create the abstract class Bank with the abstract method getRateOfInterest() and the classes SBI and PNB that override this method:

Step 1: Create the abstract class Bank
```java
public abstract class Bank {
    abstract double getRateOfInterest();
}
```
Step 2: Create the class SBI that extends Bank and overrides the method getRateOfInterest()
```java
public class SBI extends Bank {
    double principal = 10000; // assuming a principal amount

double getRateOfInterest() {
        return (principal * 5) / 100; // calculating 5% of principal
    }

void display() {
        System.out.println("Interest amount in SBI: " + getRateOfInterest());
    }
}
```
Step 3: Create the class PNB that extends Bank and overrides the method getRateOfInterest()
```java
public class PNB extends Bank {
    double principal = 10000; // assuming a principal amount

double getRateOfInterest() {
        return (principal * 6) / 100; // calculating 6% of principal
    }

void display() {
        System.out.println("Interest amount in PNB: " + getRateOfInterest());
    }
}
```
Step 4: Create a main class to test the SBI and PNB classes
```java
public class Main {
    public static void main(String[] args) {
        SBI sbi = new SBI();
        sbi.display();

PNB pnb = new PNB();
        pnb.display();
    }
}
```
When you run the Main class, it will display the interest amount for SBI and PNB.

Knowee AI · Accepted Answer

Here is a step-by-step guide on how to create the abstract class Bank with the abstract method getRateOfInterest() and the classes SBI and PNB that override this method:

Step 1: Create the abstract class Bank
```java
public abstract class Bank {
    abstract double getRateOfInterest();
}
```
Step 2: Create the class SBI that extends Bank and overrides the method getRateOfInterest()
```java
public class SBI extends Bank {
    double principal = 10000; // assuming a principal amount

double getRateOfInterest() {
        return (principal * 5) / 100; // calculating 5% of principal
    }

void display() {
        System.out.println("Interest amount in SBI: " + getRateOfInterest());
    }
}
```
Step 3: Create the class PNB that extends Bank and overrides the method getRateOfInterest()
```java
public class PNB extends Bank {
    double principal = 10000; // assuming a principal amount

double getRateOfInterest() {
        return (principal * 6) / 100; // calculating 6% of principal
    }

void display() {
        System.out.println("Interest amount in PNB: " + getRateOfInterest());
    }
}
```
Step 4: Create a main class to test the SBI and PNB classes
```java
public class Main {
    public static void main(String[] args) {
        SBI sbi = new SBI();
        sbi.display();

PNB pnb = new PNB();
        pnb.display();
    }
}
```
When you run the Main class, it will display the interest amount for SBI and PNB.

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