HW2: Shapes

In this homework, you are going to create a bunch of classes related to geometric shapes.

MyShape.java

MyShape represents a shape with a center point, a color to draw the shape, and a font used to displace the name. You shouldn't extend any class in MyShape.java.
Here are all the members and constructors. You can't add any extra members or constructors to it.

private Font font : the font use to display the name of the shape.
private Color color: the color used to draw the shape
private Point center: the center of the shape located.
protected static final Color fontColor: the color used to display the name, it is black.
protected static final Font defaultFont : the default font used to display the name. The font name is Dialog, font style is plain, and font size is 12.
public MyShape(Point center, Color color, Font font)
public MyShape(Point center, Color color): use the defaultFont for the font .
public static String getName() : return "Shape", the name.
public void setFont(Font font) public Font getFont() public void setColor(Color color) public Color getColor() public void setCenter(Point center) public Point getCenter()
public void draw(Graphics g): draw the name (i.e. "Shape") with Font type font with the lower left corner at the center. The color of the string is fontColor.

How to check if you have all the methods I asked for?

After you compile, use

javap -private MyShape

You can replace MyShape by other class names.
The command shows up all your members and constructor in the class. If you get a line static {} , ignore it.

MyRectangle.java

It extends MyShape. Here are all the members and constructors. You can't add any extra members or constructors to it.

private int width
private int height
public MyRectangle(int width, int height, Point center, Color color, Font font)
public MyRectangle(int width, int height, Point center, Color color) : font is the default font.
public static String getName(): return "Rectangle", the name of the shape.
public void draw(Graphics g): draw the Rectangle with color color and center located at center. Again, the name (i.e. "Rectangle") with Font type font is displayed with the lower left corner at the center. The color of the string is fontColor.

MyCircle.java

It extends MyShape. Here are all the members and constructors. You can't add any extra members or constructors to it.

private int radius
public MyCircle(int radius, Point center, Color color, Font font)
public MyCircle(int radius, Point center, Color color): font is the default font.
public static String getName(): return "Circle", the name of the shape.
public void draw(Graphics g): draw the circle with color color and center located at center. Again, the name (i.e. "Circle") with Font type font is displayed with the lower left corner at the center. The color of the string is fontColor.

ShapeTest.java

An easy way to write thie program is to extend JFrame.
When you run java ShapeTest, a frame will shows up with

with size width = 500, height = 500
exit the program when close the window
title is HW2
with background color white
the output looks like this

information about 6 shapes are

shape	center	color	font
circle, radius = 100	(150,150)	green	Serif, bold and italic, 30
circle, radius = 70	(350,100)	orange	default
circle, radius = 40	(250,250)	pink	Monospaced, bold, 15
rectangle, width = 120, height = 50	(300,300)	red	Dialog, italic, 10
rectangle, width = 150, height = 100	(100,400)	yellow	default
shape	(350,400)	doesn't matter	DialogInput, plain, 40

You ShapeTest.java must make use of the shape classes you created and use the draw methods to draw on Graphics g.

Grading

The homework will be graded through the following steps

check if you have the all the members in your classes the HW described, make sure you don't have any extra memebers.
the output of java ShapeTest .
programing styles and the comments.

Submit

You should submit 4 files MyShape.java, MyCircle.java, MyRectangle.java, ShapeTest.java in the submit folder.

All source code submitted must contain the following information at the beginning of each file:

    * Your full name.
    * Your student ID number.
    * Your PIC login ID.
    * Your e-mail address.
    * Your discussion section number and TA's name.
    * The assignment number and description.
    * Honesty pledge.

Properly formatted, this information should appear as follows:

/*
 * Name:		Charles Li
 * Student ID:		000 000 000
 * PIC ID:		ccli
 * E-mail:		ccli@math.ucla.edu
 * Discussion:		1A, Mike Moore
 * Assignment:		hw2
 *
 * I, Charles Li, pledge that this is my own independent work, which 
 * conforms to the guidelines of academic honesty as described in the course 
 * syllabus. 
 *
 */

Solution

MyShape.java, MyCircle.java, MyRectangle.java ShapeTest.java .