Question

I am checking the below condion and displaying dialog box

if(query.contains(tab))
        {
        JOptionPane.showMessageDialog(null,"Owner does not have privileges to access given table");
        }

I want when the dialog box is displayed and condition is true .further execution should stop there itself.How to do this?

and Does JOptionPane degrades application performance? because my application takes lot of time to display dialog box.

Edit:

  for(int i=0; i<ia.length; i++) 
      {

                tab=  ia[i].toString(); 
                    if(query.contains(tab))
                {
                    JOptionPane.showMessageDialog(null,"Owner does not have privileges to access given table");
                    break;
                }
        }
//rest code

Answer 1

Based on you comments on @Robin’s answer:

It stops untill the user disposes dialog but I want to stop the
further execution even after the dialog box is closed i.e I want to
stop execution of task which are there after above if block.

---

Please see edited post.I want to block rest code part,how can I add
it in else?

What you can do in your case is: take a flag to decide whether to execute rest of code or not. Some thing like:

boolean executeCode = true; // boolean flag to decide
for(int i=0; i<ia.length; i++)  {
   tab=  ia[i].toString(); 
   if(query.contains(tab)) {
      JOptionPane.showMessageDialog(null,
                   "Owner does not have privileges to access given table");
      executeCode= false; // do not want to execute the rest of code
      break;
   }
}
if (executeCode) {
   //rest code
}

_{I’m not completely sure that I have understood your problem well, but I posted this answer based on what I understood from your above comments and it might also become hard to explain this in comments. Notify me if I’m wrong or have not understood it properly.}