using Java in blueJ format, write a class and method to display a canvas on a object $-300$by $500$pixes$,$ using m$250.$canavs as a import, this is the package page

public class Canvas extends Object

Canvas is a class to allow for simple graphical drawing on a canvas. This is a modification of the general purpose Canvas.

Version:

$20-2-2024$

Author:

Bruce Quig, Michael K$$lling $($mik$),$ Anton Dil

Method Summary

All MethodsStatic MethodsInstance MethodsConcrete Methods

Modifier and Type

Method

Description

void

draw$($Object$$referenceObject$,$Color$$color$,$Shape$$shape$)$

Draw a given shape onto the canvas.

void

erase$($Object$$referenceObject$)$

Erase a given shape from the screen.

static$$Canvas

getCanvas$()$

Factory method to get the canvas singleton object.

void

setBackgroundColor$($Color$$bgColor$)$

Change the background $($canvas$)$ colour.

void

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

Set the foreground colour using red, green and blue components.

void

setForegroundColor$($Color$$c$)$

Set the foreground drawing colour.

void

setVisible$($boolean$$visible$)$

Set the canvas visibility and bring the canvas to the front of screen when made visible.

void

wait$($int$$ms$)$

Wait for a specified number of milliseconds before finishing.

Methods inherited from class$$java$.$lang.Object

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

Method Details

$$ getCanvas

public static$$Canvas$$getCanvas$()$

Factory method to get the canvas singleton object.

Returns:

the singleton Canvas object

$$ setVisible

public$$void$$setVisible$($boolean$$visible$)$

Set the canvas visibility and bring the canvas to the front of screen when made visible. This method can also be used to bring an already visible canvas to the front of other windows.

Parameters:

visible$-$ boolean value representing the desired visibility of the canvas $($true or false$).$

$$ draw

public$$void$$draw$($Object$$referenceObject$,$

$$Color$$color$,$

$$Shape$$shape$)$

Draw a given shape onto the canvas.

Parameters:

referenceObject$-$ a reference to the object to be drawn.

color$-$ the Color of the shape.

shape$-$ the Shape object to be drawn on the canvas.

$$ erase

public$$void$$erase$($Object$$referenceObject$)$

Erase a given shape from the screen.

Parameters:

referenceObject$-$ the Shape object to be erased.

$$ setForegroundColor

public$$void$$setForegroundColor$($Color$$c$)$

Set the foreground drawing colour.

Parameters:

c$-$ the Color to use.

$$ setBackgroundColor

public$$void$$setBackgroundColor$($Color$$bgColor$)$

Change the background $($canvas$)$ colour.

Parameters:

bgColor$-$ the Color to use.

$$ setForegroundColor

public$$void$$setForegroundColor$($int$$r$,$

$$int$$g$,$

$$int$$b$)$

Set the foreground colour using red, green and blue components.

Parameters:

r$-$ The red component, an integer in the range $0-255$

g$-$ The green component, an integer in the range $0-255$

b$-$ The blue component, an integer in the range$0-255$

$$ wait

public$$void$$wait$($int$$ms$)$

Wait for a specified number of milliseconds before finishing. This provides an easy way to specify a small delay which can be used when producing animations.

Parameters:

ms$-$ the millisecond amount to wait.