Blink jframe in swing without transferring focus

问题

I want to blink my jframe's entry in taskbar but do not want it to get focused. I read about in on net and tried different solutions but none of them worked for me.

In my case I have a main jframe which has 2 buttons on click of which 2 jframes are opened. Both jframe listens to some event messages and on receiving of message it should blink if not focused.

I have tried following:

1. frame.toFront();
2. frame.requestFocus();
3. frame.firePropertyChange();
4. frame.setVisible(true);

They all worked well in blinking windows but the focus also gets transfered to that window which I don't want it do. How can I stop focus transfer? I have also tried calling transferFocus(); after the above options but didn't worked.

I have searched on SO but didn't find the solution. The questions I found are

• How can I flash the Windows taskbar using Swing?
• JFrame to be displayed when the event occurs?

---

My current code:-

public void OnEvent(){
    Toolkit.getDefaultToolkit().beep();  
    if(!hasFocus()){
         toFront(); //requestFocus(); //setVisible(true); //firePropertyChange("",false,true);
    }
}

来源：https://stackoverflow.com/questions/6423987/blink-jframe-in-swing-without-transferring-focus