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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] java applets and applications:difference
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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