Answer:
Everything following the <head>
tag will be counted as part of the heading.
You might see nothing in the browser.
Everything following the <head>
tag will be counted as part of the heading.
You might see nothing in the browser.
getWidth() and getHeight()
It is awkward to hard-code the width and height of
the applet in the source code.
The width and height given in the
<applet> tag must agree with
the code.
A better way to do this is to use these
two methods:
int getWidth() --- return the width of the applet int get Height() --- return the height of the applet
The width and height of the applet
are coded in the <applet> tag.
The code that draws the applet uses the two methods
to get these values at run time.
So now, different <applet> tags
can ask for the same applet to paint different
sized rectangles.
The source code does not need to be recompiled for
different sizes.
The following code shows the circle applet modified to use these methods.
Since the drawing area varies in size, the radius needs to be based on the smallest of height and width.
The three applets at the top of this page are all running the same applet code with different height and width in the tag. (Click on "View" "Page Source" in your browser to see the HTML tags.)
import javax.swing.JApplet;
import java.awt.*;
// Draw a centered circle.
// Get the height and width from the web page.
// Base the radius on the smallest of the two.
public class JustOneCircleRev extends JApplet
{
public void paint ( Graphics gr )
{
int width = getWidth();
int height = getHeight();
int radius;
if ( width<height )
radius = 2*width/5;
else
radius = 2*height/5;
gr.setColor( Color.white );
gr.fillRect( 0, 0, width, height );
gr.setColor( Color.black );
gr.drawOval( (width/2 - radius), (height/2 - radius), radius*2, radius*2 );
}
}
Would it be easy to modify this code so that it draws an
oval in the rectangle specified in the <applet> tag?