Question $1$

In this lab assignment, you are asked to write java code of given classes in the following class diagram.

Circle

# radius: double

# color: String

$+$ PI:double

$+$ getRadius$()$: double

$+$ setRadius$($radius:double$)$: void

$+$ getColor$()$:String

$+$ setColor$($color:String$)$: void

$+$ getArea$()$:double

$+$ draw$()$:void

$```$

Curve

$-$ angle: double

$+$ getAngle$()$: double

$+$ setAngle$($angle:double$)$: void

$+$ getArea$()$:double

$+$ draw$($val:double$)$:void

$```$

$```$

Cylinder

$-$ height: double

$+$ getHeight$()$: double

$+$ setHeight$($height:double$)$: void

$+$ getArea$()$:double

$+$ draw$($val:int$)$:void

$```$

Instructions:

$-$ Create classes with defined attributes.

$-$ Write the methods of classes according to the given signatures,

$-\backslash (\backslash$quad $\backslash )$ Pl as a constant final attribute. $($PI$=3\mathrm{.}14)$

$-$ You can get class name using the following code in java:

$-$ this.getClass$().$getSimpleName$()$;

$-$ The methods draw$(),$ getArea$()$ give information when it is invoked. It prints out the class name and $"...$method is invoked $".$

$-$ i$.$e$.$ draw$()$ method has the following line:

System.out.println$($this$.$getClass$().$getSimpleName$()+"$ draw method is invoked"$)$;