If you are willing to accept an answer from non-computer engineer; here it goes 😉 -
1. HTML is Hyper Text Markup Language. Remember -it is NOT programming! It's just putting 'marks' around the text so as to make it look beautiful as a web page.
Here's how HTML looks (note, its just putting up tags around the text)
<html>
<body>
The content of the body element is displayed in your browser.
</body>
</html>
2. Applet on the other hand is a JAVA program that is 'embedded' in the HTML code to provide 'functionality' (note the quotes!) to the web page.
Here's a sample applet code taken from
Source: #-Link-Snipped-#
/*
* @(#)ArcTest.java 1.5 98/06/29
*
* Copyright (c) 1997, 1998 Sun Microsystems, Inc. All Rights Reserved.
*
* Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
* modify and redistribute this software in source and binary code form,
* provided that i) this copyright notice and license appear on all copies of
* the software; and ii) Licensee does not utilize the software in a manner
* which is disparaging to Sun.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
* IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
* LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
* OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
* LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
* INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
* CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
* OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* This software is not designed or intended for use in on-line control of
* aircraft, air traffic, aircraft navigation or aircraft communications; or in
* the design, construction, operation or maintenance of any nuclear
* facility. Licensee represents and warrants that it will not use or
* redistribute the Software for such purposes.
*/
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/**
* An interactive test of the Graphics.drawArc and Graphics.fillArc
* routines. Can be run either as a standalone application by
* typing "java ArcTest" or as an applet in the AppletViewer.
*/
public class ArcTest extends Applet {
ArcControls controls; // The controls for marking and filling arcs
ArcCanvas canvas; // The drawing area to display arcs
public void init() {
setLayout(new BorderLayout());
canvas = new ArcCanvas();
add("Center", canvas);
add("South", controls = new ArcControls(canvas));
}
public void destroy() {
remove(controls);
remove(canvas);
}
public void start() {
controls.setEnabled(true);
}
public void stop() {
controls.setEnabled(false);
}
public void processEvent(AWTEvent e) {
if (e.getID() == Event.WINDOW_DESTROY) {
System.exit(0);
}
}
public static void main(String args[]) {
Frame f = new Frame("ArcTest");
ArcTest arcTest = new ArcTest();
arcTest.init();
arcTest.start();
f.add("Center", arcTest);
f.setSize(300, 300);
f.show();
}
public String getAppletInfo() {
return "An interactive test of the Graphics.drawArc and \nGraphics.fillArc routines. Can be run \neither as a standalone application by typing 'java ArcTest' \nor as an applet in the AppletViewer.";
}
}
class ArcCanvas extends Canvas {
int startAngle = 0;
int endAngle = 45;
boolean filled = false;
Font font;
public void paint(Graphics g) {
Rectangle r = getBounds();
int hlines = r.height / 10;
int vlines = r.width / 10;
g.setColor(Color.pink);
for (int i = 1; i <= hlines; i++) {
g.drawLine(0, i * 10, r.width, i * 10);
}
for (int i = 1; i <= vlines; i++) {
g.drawLine(i * 10, 0, i * 10, r.height);
}
g.setColor(Color.red);
if (filled) {
g.fillArc(0, 0, r.width - 1, r.height - 1, startAngle, endAngle);
} else {
g.drawArc(0, 0, r.width - 1, r.height - 1, startAngle, endAngle);
}
g.setColor(Color.black);
g.setFont(font);
g.drawLine(0, r.height / 2, r.width, r.height / 2);
g.drawLine(r.width / 2, 0, r.width / 2, r.height);
g.drawLine(0, 0, r.width, r.height);
g.drawLine(r.width, 0, 0, r.height);
int sx = 10;
int sy = r.height - 28;
g.drawString("S = " + startAngle, sx, sy);
g.drawString("E = " + endAngle, sx, sy + 14);
}
public void redraw(boolean filled, int start, int end) {
this.filled = filled;
this.startAngle = start;
this.endAngle = end;
repaint();
}
}
class ArcControls extends Panel
implements ActionListener {
TextField s;
TextField e;
ArcCanvas canvas;
public ArcControls(ArcCanvas canvas) {
Button b = null;
this.canvas = canvas;
add(s = new TextField("0", 4));
add(e = new TextField("45", 4));
b = new Button("Fill");
b.addActionListener(this);
add(b);
b = new Button("Draw");
b.addActionListener(this);
add(b);
}
public void actionPerformed(ActionEvent ev) {
String label = ev.getActionCommand();
canvas.redraw(label.equals("Fill"),
Integer.parseInt(s.getText().trim()),
Integer.parseInt(e.getText().trim()));
}
}
So, HTML (and CSS) will decide how the page will look and applet will decide how the web page acts.
Clear enough?
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