我在这个类中执行任务,对话框弹出为白色框。打印语句IS打印出我期待的进度值,但直到操作完成后才在对话框中显示出来。在对话框结束之前,我可以看到进度条闪烁一毫秒。绝对不知道怎么回事:\JProgressBar是不可见的,但进度正在更新
public class ProgressDialog extends JDialog {
private JProgressBar pb;
private SwingWorker<Boolean, Void> task;
public SwingWorker<Boolean, Void> getTask(){
return task;
}
public ProgressDialog(final String call){
setTitle("Working...");
setLayout(new BorderLayout());
setBounds(300,300,300,100);
pb = new JProgressBar(0, 100);
pb.setValue(0);
pb.setVisible(true);
pb.setStringPainted(true);
add(pb, BorderLayout.CENTER);
setVisible(true);
task = new SwingWorker<Boolean, Void>(){
public Boolean doInBackground(){
switch(call){
case "Category": pb.setValue(Category.getProgress());
while(pb.getValue()<99){
try{
Thread.sleep(500);
} catch (InterruptedException e){
Thread.currentThread().interrupt();
}
pb.setValue(Category.getProgress());
System.out.println(pb.getValue());
repaint();
revalidate();
}
break;
}
return true;
}
public void done(){
dispose();
}
};
}
}
编辑:试过这个改变。没有骰子。为什么我甚至没有获得0%的进度条?这是没有意义的 - 它只有一次是在100%
public class ProgressDialog extends JDialog {
private JProgressBar pb;
private SwingWorker<Boolean, Integer> task;
public SwingWorker<Boolean, Integer> getTask(){
return task;
}
public ProgressDialog(final String call){
setTitle("Working...");
setLayout(new BorderLayout());
setBounds(300,300,300,100);
pb = new JProgressBar(0, 100);
pb.setValue(0);
pb.setStringPainted(true);
add(pb, BorderLayout.CENTER);
setVisible(true);
task = new SwingWorker<Boolean, Integer>(){
public Boolean doInBackground(){
switch(call){
case "Category": setProgress(Category.getProgress());
while(pb.getValue()<99){
try{
Thread.sleep(500);
} catch (InterruptedException e){
Thread.currentThread().interrupt();
}
setProgress(Category.getProgress());
}
break;
}
return true;
}
public void done(){
//dispose();
}
};
task.addPropertyChangeListener(new PropertyChangeListener() {
public void propertyChange(PropertyChangeEvent evt) {
if ("progress".equals(evt.getPropertyName())) {
System.out.println((Integer)evt.getNewValue());
pb.setValue((Integer)evt.getNewValue());
pb.revalidate();
pb.repaint();
}
}
});
}
}
请在更新看答案,特别是ryvantage的答案和代码,你应该接受。 –