如何在Java中仅显示字符串几秒钟？

Question

I would like to show a String for only 5 secs on the center of my JFrame. How can I do it?

Answer 1

1. Add a JLabel to your JFrame .
2. Set the text of the JLabel .
3. For waiting, don't use the Event Dispatch Thread on which you are when creating the UI elements. Use a Swing Timer instead: Swing Timer
4. When the timer fires, set the text of the JLabel to the empty string or remove it entirely.

Answer 2

This is a Swing question and so the solution is to use a Swing Timer not Thread.sleep(...) . If you use thread sleep, you will risk sleeping the Swing event thread, putting the entire GUI to sleep, preventing any new text from showing.