in java start UML Violet UML Editor.

$$ Open a Class Diagram

$$ Add a class diagram: add a class name $($Name$),$ the design of its instance$/$static variables $($Attributes$)$ and the design of its instance$/$static methods $($Methods$).$

Add class diagram for Rectangle, sub class of Shape. Complete diagram by adding the

instance variables and methods except the constructors

The Rectangle class will inherit all the instance variables from Shape class and have the following

instance variables:

length $-$The length of this rectangle

width $-$The width of this rectangle

The Rectangle class will inherit all the public methods except the constructors from Shape class and have the

following methods:

Default constructor $-$Creates a default rectangle instance. default, a rectangle has the following

values for its fields:

name: $$Rectangle$$

length: $1\mathrm{.}0$

width: $1\mathrm{.}0$

The second constructor $-$Given a name, a length, and a width, creates a rectangle instance with the name,

the length, and the width.

For example, new Rectangle $($Small rectangle$,12\mathrm{.}3,23\mathrm{.}7).$

getLength Returns the length of this rectangle.

setLength Given a length, changes the length of this rectangle to the new length.

getWidth Returns the width of this rectangle.

setWidth Given a width, changes the width of this rectangle to the new width.

area Returns the area of this rectangle. originally written in the super class. It equals Compares this rectangle with some other object. This method overrides the equals

method from Shape class.

toString Represents this rectangle as a string literal. This method overrides the toString method from the Shape class.

Add a class diagram for Circle, a sub class of Shape. add the following instance variables and methods except the constructors.

The Circle class will inherit name from the Shape class and have the following:

radius The radius of this circle

The Circle class will inherit all public methods except the constructors from the Shape class and have the

following additional methods:

Default constructor Creates a default circle instance. By default, a circle has the following values for its

fields:

name: $$Circle$$

radius: $1\mathrm{.}0$

The second constructor Given a name and a radius, creates a circle instance with the name and the radius.

For example, new Circle $($Big circle$$ of radius of $23\mathrm{.}7).$

getRadius Returns the radius of this circle.

setRadius Given a radius, changes the radius of this circle to the new radius.

area Returns the area of this circle

equals Compares this circle with some other object. This method overrides the equals

method from the Shape class.

toString Represents this circle as a string literal. This method overrides the toString method

from the Shape class.

Add a class diagram for Triangle, a sub class of Shape. Complete the diagram by adding the following

instance variables and methods except the constructors.

The Triangle class will inherit name from the Shape class and have the following additional instance variables:

sideOne The first side of this triangle

sideTwo The second side of this triangle

sideThree The third side of this triangle

The Triangle class will inherit all public methods except the constructors from the Shape class and have the

following methods:

Method Description

Default constructor Creates a default triangle instance. By default, a triangle has the following values for

its fields:

name: $$Triangle$$

sideOne: $1\mathrm{.}0$

sideTwo: $1\mathrm{.}0$

sideThree: $1\mathrm{.}0$

The second constructor Given a name and three sides, creates a triangle instance with the name and the

sides. For example, new Triangle $($Right Triangle$,3\mathrm{.}0,4\mathrm{.}0,5\mathrm{.}0).$

In a triangle, the sum of any two sides is greater than the third side. Class Triangle

must adhere to this rule.

getSideOne Returns the first side of this triangle.

setSideOne Given a side, changes the first side of this triangle if the new side will form a triangle

with the other two sides. Otherwise, an InvalidTriangleException object with a proper

message should be thrown.

getSideTwo Returns the second side of this triangle.

setSideTwo Given a side, changes the side two of this triangle if the new side will form a triangle

with the other two sides. Otherwise, an InvalidTriangleException object with getSideThree Returns the third side of this triangle.

setSideThree Given a side, changes the side three of this triangle if the new side will form a triangle

with the other two sides. Otherwise, an InvalidTriangleException object with a proper

message should be thrown.

area Returns the area of this triangle. This method is originally written in Shape class. It is

implemented to return the area of this triangle.

A$=$s$($s $$ a$)($s $$ b$)($s $$ c$),$

equals Compares this triangle with some other object. overrides the equals

method from the Shape class.

toString $-$a string literal. verrides the toString method from shape class. Add a class diagram for InvalidTriangleException, on which Triangle depends only need class name. WRITE SOURCE CODE!! Make sure the UML class diagram is resaved or moved in package under src$.$