Re: java applets and applications:difference

[Bob Pendleton <bobp@pendleton.com>]

Jonathan Smith wrote:
> 
> I wrote an applet that has a lamp cutting on and off while the lamp is
> blinking. I was wondering(I do a lot of that), how could I turn this applet
> into an application. I like to create applications more than applets, but
> the book I have is more applet centered. My hope is that someone could teach
> me how to convert applets to applications; in it's basic form such as the
> start method, init method and so on. Also, how do I use the Graphics and
> color classes in my applications?
> One last question: Is it really easier to create applets than applications?
> It just seems that way to me because the majority of java programs I see are
> applets?  




Now, this is the code I want to convert:
> 
> import java.awt.Graphics;
> import java.awt.Color;
> public class lampapp extends java.applet.Applet implements Runnable {
>     //run1 is the running thread. x is the true/false value determining
>     //wether the lamp is on or off. lampplace is where the first ring
>     //of the lamp string is. lampstate is a value == 0 or 1 which
>     //controls wether the lamp is on or off.
>     Thread run1;
>     boolean x;
>     int lampplace;
>     int lampstate;
> public void init() {
>     setBackground(Color.black);
>     lampstate = 0;
>     }
> public void start () {
>     if (run1 == null) {
>     run1 = new Thread(this);
>     run1.start ();
> }
> }
> public void stop () {
>     if (run1 != null) {
>         run1.stop();
>         run1 = null;
>     }
> }
> public void pause(int time) {
>     try{Thread.sleep(time);}
>     catch (InterruptedException e){ }
> }
> public boolean lampon () {
>     //when lampon is called, it returns true, stating that the lamp is on
>    boolean a = true;
>    return a;
> }
> public boolean lampoff () {
> //when lampoff is called, it returs false,stating that the lamp is off
>     boolean b = false;
>     return b;
> }
> public void run () {
>     while (true) {
>         //continue to cut the light on and off as long as true;which
>         //is forever
>         int i;         //the counter variable for the for loop
>         for (i=70;i <=73; i +=3) {    //this for loop increases
>         //the value of i.i determines where the pull-
>         //chain will be.
>         lampplace = i;  //where the start of the top of the lamp string
>         //will be.I must also repaint it saying that the lamp string
>         //has moved. this is for when it is going down
>         repaint();  //this repaint method is for the down chain
>         pause(400); //stop for 500 milliseconds. pause is my method
>         }
>         int w;
>         for (w=73;w >=70; w -=3) {  //this for loop does the same
>         //thing as the other one. only it is for going up
>         lampplace = w;
>         repaint(); //this repaint method is for the chain going down
>         pause(200);
>         }
>         /*All the stuff above is just for the chain going up then
>         down. Now I will have a variable-int- that will determine
>         wether to call lampon or lampoff. If the variable == 0 then
>         call lampoff and if 1 call lampon or vice versa.*/
>         if (lampstate == 0) {
>             x = lampon();
>             /*I don't make lampstate = 1 here because if I did the
>             statement below this would would just make the lamp dark
>             everytime before it even got painted light. I declare it
>             in the paint method.*/
>         }
>         if (lampstate == 1) {
>             x = lampoff();
>             /*neither do I make lampstate = 0 here because mentally
>             it is just easier for me to recognize what is going on.
>             It, too, is declared in paint*/
>         }
>         repaint();  //I repaint the screen and pause for 2 seconds
>         pause(100);
>     }
> }
> 
> /*Note. I wanted to override the update method, but it may take too
> long. I may add it in later. Right now I want to test everything and
> see if it works.*/
> 
> public void paint(Graphics g) {
>     //draw the lamp
>     //the lamp shade
>     //shade.top(joke)
>     g.setColor(Color.green);
>     g.drawLine(45,40,95,40);
>     //shade.leftside
>     g.drawLine(45,40,35,85);
>     //shade.leftbottom
>     g.drawLine(35,85,53,85);
>     //shade.rightside
>     g.drawLine(95,40,105,85);
>     //shade.rightbottom
>     g.drawLine(105,85,87,85);
>     //lamp.leftside
>     g.setColor(Color.red);
>     g.drawArc(47,80,29,63,90,135);
>     //lamp.rightside
>     g.drawArc(64,80,29,63,90,-135);
>     //lamp.bottomcircle
>     g.drawArc(35,123,64,30,123,278);
>     //bulb.left
>     g.drawLine(61,71,61,81);
>     //bulb.right
>     g.drawLine(79,81,79,71);
>     //bulb.top
>     g.drawArc(58,44,25,30,228,-270);
> 
>     //draw the chain
>     g.setColor(Color.blue);
>     g.drawLine(100,lampplace,100,lampplace + 3);
>     g.drawLine(100,lampplace + 7,100,lampplace + 10);
>     g.drawLine(100,lampplace + 14,100,lampplace + 17);
>     g.drawLine(100,lampplace + 21,100,lampplace + 24);
>     g.drawLine(100,lampplace + 28,100,lampplace + 31);
>     g.drawLine(100,lampplace + 35,100,lampplace + 38);
>     g.drawLine(100,lampplace + 42,100,lampplace + 45);
>     g.fillRect(98,lampplace + 47,4,4);
> 
>     //if lampon is called then x = true and that means the lamp
>     //is on
>     if (x == true) {
>         g.setColor(Color.yellow);
>         g.fillOval(63,53,15,15);
>         lampstate = 1;
>         g.drawString("Lamplight Productions", 30, 8);
>     }
>     //if lampoff is called the x = false and that means the lamp is
>     //off
>     if (x == false) {
>         g.setColor(Color.black);
>         g.fillOval(63,53,15,15);
>         lampstate = 0;
>         g.drawString("                     ", 30, 8);
>     }
> 
> }
> }
> 
> Thanks so much
> 
>                                       Peace and God bless
>                                          Jonathan Smith
> 
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