如何异步触发JProgressBar？

如何异步触发JProgressBar？

您需要长时间运行并在之外的单独Thread中更新进度栏值

EDT

。在大多数情况下，这

SwingWorker

是一个很好的方法。因此，在

ActionListener

该按钮中，应将长时间运行的线程与EDT分开。您可以赤手空拳来完成此任务，

Thread

并且专门

SwingWorker

针对此类情况设计：

package graphics;import java.awt.Dimension;import java.awt.FlowLayout;import java.awt.Toolkit;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.Jframe;import javax.swing.JOptionPane;import javax.swing.JProgressBar;import javax.swing.SwingUtilities;import javax.swing.SwingWorker;public class GraphicDev extends Jframe{    private static final long serialVersionUID = 679207429168581441L;    //    private static final int frame_WIDTH = 300;    private static final int frame_HEIGHT = 100;    private int percent;    private JProgressBar progress;    public GraphicDev() {        Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();        setBounds(dim.width/2-frame_WIDTH/2, dim.height/2-frame_HEIGHT/2, frame_WIDTH, frame_HEIGHT);        setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE);        //        setLayout(new FlowLayout());        //        progress = new JProgressBar(0, 100);        progress.setStringPainted(true);        //        JButton actButton = new JButton("Start!");        actButton.addActionListener(new ActionListener() {@Override public void actionPerformed(ActionEvent e) {     new SwingWorker<Void, Void>() {         @Override         protected Void doInBackground() throws Exception {  for (long i = 0; i < 10000000000000L; i++) {      System.out.println(i);      if(i%200000 == 0){          progress.setValue(percent++);      }      if(percent >= 100){          break;      }  }  return null;         }         @Override         protected void done() {  JOptionPane.showMessageDialog(GraphicDev.this, "Done!");         }     }.execute();     }        });        //        add(actButton);        add(progress);    }    public static void main(String[] args) {        SwingUtilities.invokeLater(new Runnable() { @Override public void run() {     GraphicDev g = new GraphicDev();     g.setVisible(true); }        });    }}

希望这会有所帮助。