CODEWITHSUNDEEP
javaweb-crawlercrawler4j
csnewb
csnewb

Reputation: 1270

Crawler4j ImageCrawler String args

I´m trying to start the crawler4j example of: crawler4j

When I start the ImageCrawlController I allready fail by the first step args.length < 3, because its 0. How can I make sure, that args is bigger then 3?

public class ImageCrawlController {
  public static void main(String[] args) throws Exception {
    if (args.length < 3) {
      System.out.println("Needed parameters: ");
      System.out.println("\t rootFolder (it will contain intermediate crawl data)");
      System.out.println("\t numberOfCralwers (number of concurrent threads)");
      System.out.println("\t storageFolder (a folder for storing downloaded images)");
      return;
    }
  }
}

Upvotes: 0

Views: 169

Answers (1)

Serafins
Serafins

Reputation: 1247

'... how can I put a value in the main-function for args? The main-function always starts with args = 0.'

In eclipse: RUN-> RUN CONFIGURATION. In left menu select Java application. Now select tab: ARGUMENTS.

You can call them: System.out.println(args[1]); ///<-2

add arguments, separate them whitespace

Upvotes: 1

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