How to use timeout for looping in java?

Question

this code i make.

public long detecFace(int threshold, int dir, JLabel... lbl) throws InterruptedException {

    long timeStart = Calendar.getInstance().getTimeInMillis();         
    BufferedImage[] finalImg = new BufferedImage[10];
    BufferedImage[] edgeImage = new BufferedImage[10];

    long t = System.currentTimeMillis();
    long end = t-300000;
    while (t < end){
        for (int i = 0; i < 5; i++) {
            ip.setFileImage(df.getFile()[i]);
            ip.procesImage(threshold, dir);
            edgeImage[i] = ip.getEdgeImage();
            //ImageDrawer.drawOriginalImage(edgeImage[i]); //BENER HASIL YANG KELUAR
            finalImg[i] = showSelectedFace(RHT(edgeImage[i]), ResearchData.getOriginalImage()[i]);
            //ImageDrawer.drawOriginalImage(finalImg[i]); //SALAH HASIL YANG KELUAR
            int count = 1;
            int total = count + i;
            System.out.println(total);

            if (finalImg[i] != null)
            {
                ui.drawerImage(finalImg[i], lbl[i]);
            } else {
                System.out.println("Failed!");
            }
        }
    Thread.sleep(end);
    }    
    ResearchData.setEdgeImage(edgeImage);
    ResearchData.setFinalImage(finalImg);

    long timeEnd = Calendar.getInstance().getTimeInMillis();
    long tt = timeEnd - timeStart;
    long second = tt/1000;
    long minute = second/60;
    long seconds = second%60;
    System.out.println("minute =" +minute+ "; second =" +seconds);     
    return tt;   
}`

I try to make loop using timeout but I stack with the result. there is no error but false for logical. I wanna make my program running for 3 or 5 minutes and as long as program running there is a looping again in there. help me to find best solution with my problem. thank you

my aim is program will stop when the time is out, whether "for loop" done or not..but I'm not really sure for code I made. — Winda Agusthia Netto
– Winda Agusthia Netto, Commented Oct 24, 2018 at 5:24

Pandey Amit · Accepted Answer · 2018-10-24 04:28:39Z

7

try like this.

  long start = System.currentTimeMillis();
    long end = start + 300000;
    while(true) {
        //do your code
        //
        if(System.currentTimeMillis() > end) {
            break;
        }
    }

answered Oct 24, 2018 at 4:28

Pandey Amit

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5 Comments

Pandey Amit Over a year ago

try with less time, 300000 ms is equivalent to 5 minutes.

Winda Agusthia Netto Over a year ago

it's not working :'( the program stil running until looping for 5 times (loop for)

Pandey Amit Over a year ago

do you want to run inner for loop only once? then there is no need for while loop. remove while loop and after for loop just put Thread.sleep(300000)

Winda Agusthia Netto Over a year ago

yes. and program still running until for loop done. :'(

Winda Agusthia Netto Over a year ago

my aim is program will stop when time is out. whether for loop done or not.

PKabengele · Accepted Answer · 2022-04-14 08:04:27Z

1

long timeoutInMn = 3;
LocalDateTime startTime = LocalDateTime.now();
while (true && ChronoUnit.MINUTES.between(startTime, LocalDateTime.now()) <= timeoutInMn ) {

}

edited Apr 14, 2022 at 8:04

answered Apr 14, 2022 at 7:59

PKabengele

112 bronze badges

2 Comments

PKabengele Over a year ago

You can change MINUTES by the ChronoUnit you want of course

Mark Rotteveel Over a year ago

Please don't post only code as answer, but also provide an explanation what your code does and how it solves the problem of the question. Answers with an explanation are usually more helpful and of better quality, and are more likely to attract upvotes.

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