• November 2nd, 2013, 01:44 PM
Mackenzie97
The assignment:
1. Write a class Square that represents a square to be drawn. Store the following information in instance variables:
�� size (length of any side)
�� x coord of upper left-hand corner
�� y coord of upper left-hand corner
�� color
Provide the following methods:
�� A parameterless constructor that generates random values for the size, color, x, and y. Make the size between 100
and 200, x between 0 and 600, y between 0 and 400. The squares can be any color—note that you can pass a single
int parameter to the Color constructor, but it will only consider the first 24 bits (8 bits for each of R, G, B
component).
�� IMPORTANT: Your random number generator must be declared at the class level (not inside the constructor), and
must be declared static. So its declaration and initialization should appear with the declarations of size, color, x, and
y, and should look like this:
private static Random generator = new Random();
�� A draw method that draws the square at its x,y coordinate in its color. Note that you need a Graphics object, like the
page parameter of the paint method, to draw. Your draw method should take a Graphics object as a parameter.
2. Now write an applet DrawSquares that uses your Square class to create and draw 5 squares. This code should be very
simple; the paint method will simply create a Square and then draw it, repeated 5 times. Don’t forget to pass the
Graphics object to draw.

My Code:
Square.java (The driver)

package Mackenzie;
//*************************************....
// Square.java
// Mackenzie
// 10/28/13
//*************************************....
import java.awt.*;
import javax.swing.*;
import java.util.Random;
public class Square
{
private int size;
private int x;
private int y;
private Color color;
private int a1, a2, a3;
private static Random generator = new Random();
public Square(){
size = generator.nextInt(51) + 50;
x = generator.nextInt(301);
y = generator.nextInt(301);
a1 = generator.nextInt(256);
a2 = generator.nextInt(256);
a3 = generator.nextInt(256);
color = new Color(a1, a2, a3);
}
public void draw(Graphics pen)
{
pen.setColor(color);
pen.fillRect(x, y, size, size);
}
}

DrawingSquares.java

package Mackenzie;
//*************************************....
// DrawSquares.java
// Mackenzie
// 10/28/13
//*************************************....
import java.awt.*;
import javax.swing.*;
public class DrawSquares extends JApplet {
public int i;
Square[] square;
public void init(){
square = new Square[5];
for(int i = 0; i < square.length; i++);
square[i] = new Square();
}
public void paint(Graphics g) {
super.paint(g);
for(int i = 0; i < square.length; i++);
square[i].draw(g);
}
}

It's supposed to draw five squares and every time you move the applet window, it is supposed to continue to draw 5 squares. Can you tell me what I'm doing wrong?
Thanks.
• November 2nd, 2013, 01:55 PM
Norm