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Java code for the following inheritance hierarchy figure..

1. Create class **Point**, with two private instance variables x and y that represented for the coordinates for a point.

Provide constructor for initialising two instance variables.

Provide **set** and **get** methods for each instance variable,

Provide **toString** method to return formatted string for a point coordinates.

2. Create class **Circle**, its inheritance from Point.

Provide a integer private **radius** instance variable.

Provide **constructor** to initialise the center coordinates and radius for a circle,.In the constructor it must call its superclass **constructor** by using **super(x,y);**

Provide set **a**nd get for **the radius** instance variable.

Provide two methods for calculating its **area** and **perimeter**.

Provide a **toString** method to return a formatted string for circle features. In the process, it must call its superclass **toString** method by using **super.toString().**

3. Similar to the above class **Circle** definition, Design **Rectangle** class.

4. Similar to the above class **Rectangle** definition, Design **Cube** class,

It has a **hight** instance variable.

Calculate the surface **area** and **volume** for a Cube.

5. Design a test-class to test the above four classes functionality

It creates four objects for these classes and calls the corresponding methods to test complete functionality for each class.

y for each class for each class. Point Rectangle Circle Cube Figure: Shape inheritance hierarchy

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