Color Help
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Task 1
Create an applet called ColorTest that sets the layout manager to GridLayout(2,2).
import java.awt.*;
public class ColorTest extends java.applet.Applet {
public void init() {
setLayout(new GridLayout(2,2));
}
}
Task 2
Define a class called ColorCanvas that is an extension of Canvas. Set the constructor to accept a Color object, that is stored in an instance variable. Define a lifecyle public void paint(Graphics g) method that sets g's color and fills a rectangle to the full extent of the Canvas. Hint: you can get the size of a Component with method size.
The paint method in a Canvas object is used just like you'd use for an applet--it is called when it is time to refresh the Component. In this case, set the color of the graphics context and then ask the context to draw a filled rectangle using the current color. size returns a Dimension with members width and height that you can access.
class ColorCanvas extends Canvas {
Color color;
public ColorCanvas(Color c) {
color = c;
}
public void paint(Graphics g) {
g.setColor(color);
g.fillRect(0, 0, size().width, size().height);
}
}
Task 3
In your applet, create and add four ColorCanvas objects with colors Color.black, Color.red, Color.orange, and Color.yellow.
public void init() {
setLayout(new GridLayout(2,2));
add(new ColorCanvas(Color.black));
add(new ColorCanvas(Color.red));
add(new ColorCanvas(Color.orange));
add(new ColorCanvas(Color.yellow));
}
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