Java-每秒重绘一次组件吗? [英] Java - repaint component every second?
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问题描述
我想每秒钟重涂一次组件,但是没有用.我正在尝试的是:
I would like to repaint component after each second, but it didn't work. What I am trying is:
try{
while(true){
Thread.currentThread().sleep(1000);
gc.cb.next();
gc.repaint();
}
}
catch(Exception ie){
}
推荐答案
I would advise using a javax.swing.Timer
for this problem, which will periodically fire an ActionEvent
on the Event Dispatch thread (note that you should only call repaint and / or manipulate Swing components from this thread). You can then define an ActionListener
to intercept the event and repaint your component at this point.
示例
JComponent myComponent = ...
int delay = 1000; //milliseconds
ActionListener taskPerformer = new ActionListener() {
public void actionPerformed(ActionEvent evt) {
myComponent.repaint();
}
};
new Timer(delay, taskPerformer).start();
还要注意, SwingWorker
可能不合适,因为它通常用于具有定义的开始和结束的后台任务,而不是定期任务.
Also note that SwingWorker
is probably inappropriate as it is typically used for background tasks that have a defined start and end, rather than a periodic task.
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