Java Program to Illustrate Use of All Features of Abstract Class

This is a Java Program to Illustrate Use of All Features of Abstract Class.

Sometimes you will want to create a superclass that only defines a generalized form that will be shared by all of its subclasses, leaving it to each subclass to fill in the details. Such a class determines the nature of the methods that the subclasses must implement.

Here is the source code of the Java Program to Illustrate Use of All Features of Abstract Class. The Java program is successfully compiled and run on a Windows system. The program output is also shown below.

```
abstract class Operations
```
```
{
```
```
    float a = 12, b = 6, c;
```
```
    abstract void add();
```
```
    void subtract()
```
```
    {
```
```
        c = a - b;
```

        System.out.println("Result:"+c);

```
    }
```
```
    abstract void multiply();
```
```
    void divide()
```
```
    {
```
```
        c = a / b;
```

        System.out.println("Result:"+c);

```
    }
```
```
}
```

public class Abstract_Demo extends Operations

```
{
```
```
    @Override
```
```
    void add()
```
```
    {
```
```
        c = a + b;
```

        System.out.println("Result:"+c);

```
    }
```
```
    @Override
```
```
    void multiply()
```
```
    {
```
```
        c = a * b;
```

        System.out.println("Result:"+c);

```
    }
```

    public static void main(String[] args)

```
    {
```

        Abstract_Demo obj = new Abstract_Demo();

```
        obj.add();
```
```
        obj.subtract();
```
```
        obj.multiply();
```
```
        obj.divide();
```
```
    }
```
```
}
```

Output:

$ javac Abstract_Demo.java
$ java Abstract_Demo
 
Result:18.0
Result:6.0
Result:72.0
Result:2.0

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