Java – the swing button does not react immediately! How can I change?

I built a form with the visual editor of NetBeans When I press one of the buttons, it should do the following:

>Set it to off > perform tasks that take some time > the button is enabled again when the task is complete

However, the following happens:

>The button remains pressed until the task is completed > when the task is completed, the buttons will be enabled / disabled very quickly (they will happen, but you won't notice them)

This behavior is not what I want I tried to use redraw on JButton, on JFrame, even on JPanel with buttons, but I couldn't seem to make it do what I wanted Some tips?

Solution

When you work in a button callback, you will stop the GUI drawing thread until it is complete

What you need to do is generate a thread to perform long-running tasks, and then let the thread use swing utilities Invoker () updates the UI on completion Not using invoker is not thread safe and is usually a bad mojo

A basic example is:

button.setEnabled(false);
new Thread(new Runnable() {
 public void run() {
  // Do heavy lifting here
  SwingUtilies.invokelater(new Runnable() {
   public void run() {
    button.setEnabled(true);
   }
  });
 }
}).start();