Break an external while loop from an inner for loop [duplicate]

Question

I want to break the outer while loop when the condition stop=true is reached in the inner for loop. Is this possible?

urlsToScrape.addAll(startUrls);

    boolean stop=false;

    while(stop==false){
        for(Link url:urlsToScrape){
p.rint(url.depth+" >= "+depth);
            if(url.depth>=depth){
                p.rint("STOP!");
                stop=true;
                break;
            }
p.rint("scrape(): "+url.link+" / "+url.depth);
            processLinks(url.link,url.depth);
            urlsToScrape.remove(url);
            scrapedUrls.add(url);
        }
    }

while(!stop){ is a better style than while(stop==false){ — jlordo
– jlordo, Commented Jun 11, 2013 at 13:37
Isn't that what already happens? The entire body of the while loop is the for loop, so if you set stop to true inside that, then break out of it, the while loop will stop iterating. — Anthony Grist
– Anthony Grist, Commented Jun 11, 2013 at 13:38
@Anthony I thought that was how it should work, but it didn't seem to. The label technique worked. — Ankur
– Ankur, Commented Jun 11, 2013 at 13:39

Denys Séguret · Accepted Answer · 2013-06-11 13:37:11Z

10

Use a label :

 outofthere:
 while (stop==false){
      for(Link url:urlsToScrape){
            p.rint(url.depth+" >= "+depth);
            if(url.depth>=depth){
                p.rint("STOP!");
                stop=true;
                break outofthere;
            }
            p.rint("scrape(): "+url.link+" / "+url.depth);
            processLinks(url.link,url.depth);
            urlsToScrape.remove(url);
            scrapedUrls.add(url);
      }
  }

See Oracle's documentation.

answered Jun 11, 2013 at 13:37

Denys Séguret

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2 Comments

Alexis C. Over a year ago

+1. I always forget to use label in loop and sometimes they are very useful.

Denys Séguret Over a year ago

@Ankur Just waiting for what exactly ? :)

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