How to put a delay in a While loop Java

[SSL]

It's a school project, we're doing a splash screen. This isn't a program that is going to be sold to people now...

 

Sorry I didn't notice it was a school project. In that case, by all means half-ass it.

[Stefan1024]

Please dont give advice like that.

Its non deterministic, wastes massive amounts of cpu resources and wont even work when you compile for release (compiler will probably filter it out when you turn on optimizations).

Use the sleep function or even better: no loading bar at all.

Why would you want to let your users wait if there is nothing to load?

It looks like I'm to much used to programm embedded systems with C without an OS. The sleep functions is better for writhing a "serious" programms.

For me it looked like a fun and/or school project and I offered the simplest and most inelegant solution. A busy wait is not that bad for a quick test.

[TheMidnightNarwhal]

value = value + 15;loadingbar.setValue(value );  

try this

 

 

 

Ok my code is this and it waits like 2 seconds then goes instnatly to 100.

 

int SHORTWAIT = 10000;int LONGWAIT = 10000 ;     int compteur = 1;int value=0;        while(compteur <24){compteur++;value = value + 15;loadingbar.setValue(value ); for(long i = 0; i < LONGWAIT; i++){for(long j = 0; j < SHORTWAIT; j++); }                }

[TheMidnightNarwhal]

Use the sleep function or even better: no loading bar at all.

 

 

Even if I find documentation I can't appear to make it work...

 

 

 

 

 

Why would you want to let your users wait if there is nothing to load?

 

Because it will look cool ha ha.

[rockking1379]

 

-snip-

import java.awt.BorderLayout;import javax.swing.JFrame;import javax.swing.JProgressBar;public class pbarTest extends JFrame{	JProgressBar jbar;		public pbarTest()	{		super();				jbar = new JProgressBar();		jbar.setValue(0);		this.add(jbar, BorderLayout.CENTER);				this.setSize(480, 600);		this.setTitle("Animate Progress Bar");		this.setVisible(true);	}		public void animate()	{		for(int i = 0; i<10; i++)		{			jbar.setValue(i*10);			try			{				Thread.sleep(100);			}			catch(InterruptedException ie)			{				System.err.println(ie.getMessage());			}		}			}		public static void main(String[] args)	{		pbarTest pbar = new pbarTest();				pbar.animate();	}}

here is an example. notice how i do not animate the progres bar in the constructor! wait until the window is fully on screen and then do the animation. this is a cheesy example since the progress bar is the only thing on the screen and takes up pretty much the entire window but at least you see that you can not do the animation before you have the window on the screen

[TheMidnightNarwhal]

I have a question are you doing a specific project out of a book, or is this where you make something up?

 

What do you mean?

[TheMidnightNarwhal]

Well, some dev classes have a book and some don't.  The ones with books tend to have programming challenges for hw out of the book, but some higher ones just are made up projects by the instructor.

 

Oh well I would say it's kinda both...? Because our teacher is giving us notes, well actually pages of his upcoming book he is going to release soon.

[TheMidnightNarwhal]

Well, what exactly is the assignment he gave?  Also, what tool are you using?  Eclipse?

 

Well we just doing a game with a splash screen. The loading bar idea was just mine and was wondering how I could do a fake one as he is showing use how to do a real one next class but I was interested in a fake one.

 

Using Netbeans.

[Trucktruck]

Get some knowledge, which is worth learning. Thanks.

[MrSuperb]

Ok my code is this and it waits like 2 seconds then goes instnatly to 100.

 

int SHORTWAIT = 10000;int LONGWAIT = 10000 ;     int compteur = 1;int value=0;        while(compteur <24){compteur++;value = value + 15;loadingbar.setValue(value ); for(long i = 0; i < LONGWAIT; i++){for(long j = 0; j < SHORTWAIT; j++); }                }

https://www.youtube.com/watch?v=JncgoPKklVE

[pbenologa]

Try this.

 

try{

 

####YOUR CODE###

Thread.sleep(5000)###5 seconds delay####

}

catch (Exception e)

{

 e.printStackTrace();

}

 

Doing a loop for 10000 will never delay your program the way you want it. It just loops around 10000 and can be done in an instant. So the best way to do this is to use Thread.sleep

[clementk]

int compteur = 1;
 int value=0;
        
while(compteur <24)
{  
  try

     {
             Thread.sleep(1000); //1000 milliseconds is one second.
     }

catch(InterruptedException ex)

    {
             Thread.currentThread().interrupt();
     }
    compteur++;
    loadingbar.setValue(value = value + 15);   
}

 

 

edit : only saw the 2nd and 3rd page after posting o well ( he asked where he should put it here )