I just wanna display 10files one by one with a period of 3 sec.

I'm trying to make a simple GUI program.
(It consist of 3 panels)
I wanna display a picture file - rotating 10 picture files with a period of 3 sec - in a certain picture box of Panel tab....
I was tried to set a picture file(.gif) into the picture box as event of ComponentShown of the panel using for-loop.
but, program hang up. I think It's caused by for-loop.
I just wanna display 10files one by one with a period of 3 sec.
Do I have to use a thread ? (if so, How do I have to do?)
otherwise, Is there any function just like sleep function of thread ?
I'm a novice of java.
Please, give me your advices.
thank you.

no, don't use a thread
just use a timer, sleep is fine for this if that's all the app is doing
// psuedocode
for(i=0; i<10; i++)
drawImage(i);
sleep(3000);
}

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