using Java and blueJ, write a class and methods to draw polygon from a file on to a canvas to display using the below packages, what are import to the class.

Package m$250$

Class OUPolygon

java.lang.Object

m$250.$OUPolygon

$\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$

public class OUPolygon extends Object

A polygon that can be drawn on a canvas and manipulated. An OUPolygon is specified by its points, which are are joined by line segments. The last point is automatically joined back to the first. $($Three points makes a triangle.$)$ An OUPolygon can be created from a file of points, or using ArrayLists. Foreground colours can be specified using java.awt.Color objects or RGB values. There is a delay method that delays all drawing on the canvas, regardless of which OUPolygon object it is invoked on$.$

Methods are provided to perform transformations on OUPolygons. Transformations that require rounding of values are only approximately reversible.

If you want to change the object assigned to an OUPolygon reference, you should first erase the original object from the canvas.

Version:

$20$ Feb $2024$

Author:

M$250$ Module team

$$ Constructor Summary

Constructors

Constructor

Description

OUPolygon$($String aFilename,Color aColor$)$

Create an OUPolygon based on points in a named file, with a given colour.

OUPolygon$($ArrayList points, Color aColor$)$

Create an OUPolygon from an ArrayList with a given colour.

OUPolygon$($ArrayList xsl$,$ ArrayList ysl$,$ Color aColor$)$

Create an OUPolygon from two lists of equal length containing integer x coordinates and y coordinates, with a given colour.

$$ Method Summary

All MethodsStatic MethodsInstance MethodsConcrete Methods

Modifier and Type

Method

Description

void

changeColor$($int r$,$ int g$,$ int b$)$

Change the colour of the OUPolygon using RGB components.

void

changeColor$($Color newColor$)$

Change the colour of the OUPolygon using a java.awt.Color object.

void

changeSize$($double dx$,$ double dy$)$

Grow $($or shrink$)$ by a specified amount.

boolean

contains$($Point p$)$

Return whether this OUPolygon contains a particular point.

static void

delay$($int ms$)$

Delay the drawing thread for at least the specified millisecond amount.

void

draw$()$

Draw this OUPolygon on the canvas, if it is visible.

void

erase$()$

Erase this OUPolygon from the canvas.

Rectangle

getBounds$()$

Return the bounding box of this shape.

ArrayList

getPolygonPoints$()$

Return all the points in this OUPolygon as an ArrayList.

boolean

intersects$($Rectangle r$)$

Return whether this OUPolygon intersects with some Rectangle, typically a bounding box of another shape.

void

makeInvisible$()$

Make this OUPolygon invisible.

void

makeVisible$()$

Make this OUPolygon visible.

void

moveHorizontal$($int dx$)$

Move the OUPolygon horizontally by a specified distance.

void

moveVertical$($int dy$)$

Move the OUPolygon vertically by a specified distance.

void

reflectHorizontally$($int xconstant$)$

Reflect this OUPolygon with respect to a vertical line x $=$ xconstant.

void

reflectVertically$($int yconstant$)$

Reflect this OUPolygon with respect to a horizontal line y $=$ yconstant.

void

rotateAbout$($Point centre, double angle$)$

Rotate the whole OUPolygon about a centre of rotation by an angle in degrees, anticlockwise.

void

setPolygonPoints$($ArrayList points$)$

Set the points of this OUPolygon.

void

shear$($Point origin, double shx$,$ double shy$)$

Shear pushes points in the x and$/$or y direction$($s$).$

String

toString$()$

Return a String representation of this OUPolygon's coordinate points.

void

transform$($Point origin,AffineTransform at$)$

Apply an AffineTransform, which can scale, shear and translate a shape, with respect to a provided origin.

void

translate$($int dx$,$ int dy$)$

Move the OUPolygon horizontally and vertically by specified amounts.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

$$ Constructor Details

$$ OUPolygon

$$ public OUPolygon$($String aFilename,

Color aColor$)$

Create an OUPolygon based on points in a named file, with a given colour. If there are no points in the file, there are no points in the OUPolygon. A new OUPolygon is not drawn on the canvas.

Parameters:

aFilename $-$ the name of the file to read points from.

aColor $-$ a colour to use for this OUPolygon.

$$ OUPolygon

$$ public OUPolygon$($ArrayList points,

Color aColor$)$

Create an OUPolygon from an ArrayList with a given colour.

Parameters:

points $-$ An ArrayList of Points to use for this OUPolygon.

aColor $-$ a java.awt.Color to use for this OUPolygon.

$$ OUPolygon

$$ public OUPolygon$($ArrayList xsl$,$

$$ ArrayList ysl$,$

Color aColor$)$