Question

I am developing a program by using JFrame and i want to realize that when you click on a button, a loop in a other class has to work. It is working but so slowly. In one second you can see just one iteration of the loop. I dont understand why. There are pieces of codes you need to know.
Calling listener:

playWithComputerButton.addMouseListener(new java.awt.event.MouseAdapter() {
        public void mouseClicked(java.awt.event.MouseEvent evt) {
            startLoop(1);
        }
    });

called piece:

if(gameMode == 2){
        int i = 0;
        while(i < 500){
            int pos = ((Computer) playerA).thinkIt(board.getBoard());
            display("bu pas : " + pos);
            i++;
        }

There is no problem with iteration and calling listener. (i have tried it also with other iterations and ‘ActionListener’ but the result is same.

What can be the solution?

Answer 1

To perform long operations not related to GUI, we can simply make use of javax.swing.SwingWorker, as Nikolay Kuznetsov and MadProgrammer explained above.

Here is a example of how to use it: example and here is the javadoc of SwingWorker: javadoc

in case of my program, the solution is:

Firstly create a new SwingWorker extending class in your JFrame class

class LoopWorker extends SwingWorker<Integer, Integer>
{
    protected Integer doInBackground() throws Exception
    {
        // perform your loop
    }

    protected void done()
    {
        // what has to be done after performing
    }
}

Then, the button should call its execute method as follow:

learnButton.addActionListener(new ActionListener() {

        public void actionPerformed(ActionEvent evt) {
            new LoopWorker().execute();
        }
     });