Question

I have an URL which will call a method my method in Java. It looks like this:

http://www.example.com/method?value=24

How can I retrieve value 24 and use it in my called method?

Answer 1

I am assuming here that you do create the number – the ’24’ – in your Java code, since you say you are using Wicket.

Thus, as seanizer already said, in 99% of the cases, you do not need to parse the request url to get the value, something like this should be sufficient:

public class MyPage extends WebPage {
   public MyPage() {
      // your number is generated somehow
      final int value = 24;

      this.add(new Link<Integer>("myLink") {
         @Override
         public void onClick() {
            // do something with the value
            int newValue = value * 2;
         }
      }
   }
}

or – with models – like this

public class MyPage extends WebPage {
       public MyPage() {
          // your number is generated somehow
          int value = 24;

          Model<Integer> model = new Model<Integer>(value);

          this.add(new Link<Integer>("myLink", model) {
             @Override
             public void onClick() {
                // your '24'
                Integer value = this.getModelObject();
                // do something with the value
                int newValue = value * 2;
             }
          }
       }
    }

If you really, really, REALLY-REALLY do need the parameter from the URL, I guess this is what you want:

public class MyPage extends WebPage {
       public MyPage(PageParameters parameters) {
          // your number is generated somehow
          Integer value = parameters.getAsInteger("value");
       }
    }

Depending on how you configured your application, you might need to implement the other constructors accordingly.

Good luck.