如何在Java Swing中显示更改的文本（即，显示时间与更改秒数） [英] How to display changing text in Java Swing (ie, display time with changing seconds)

问题描述

我正在寻找一种在JFrame上显示当前日期和时间作为JLabel的方法，但是会自动更新。一旦绘制到窗格中，我不需要担心手动更新它，因为它将每2秒刷新一次。

I'm looking for a way to display the current date and time on a JFrame as a JLabel but have it update automagically. Once it is drawn to the pane, I shouldn't need to worry about manually updating it because it will refresh say, every 2 seconds.

是否有正确的方法这样做而不是每2秒手动更改JLabel的文本值。

Is there a proper way of doing this? Instead of manually changing the JLabel's text value every 2 seconds.

推荐答案

使用 javax.swing.Timer 以确保更新Swing零件发生在EDT上。

Use the javax.swing.Timer to ensure that updates to the Swing component occur on the EDT.

Timer t = new javax.swing.Timer(2000, new ActionListener(){
    @Override
    public void actionPerformed(ActionEvent e){
        yourLabel.setText(...);
    }
});
t.start();

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