Problem of creating JProgressBar update values ​​in Loop (Threaded)

Question

I am trying to get my program to constantly update the values ​​of progress indicators inside the method during some operations. However, this does not happen until the end, and the user interface freezes.

Having examined similar issues with my problems, I tried to implement the decisions made (using threads), however I cannot get it to work correctly. Similarly, if they are not there.

My program contains several classes, and Mainthis is one that is automatically created by netbeans in JFrame Design mode, so there are certain things, such as static void mainand public Mainwhich, are not really sure about some of its contents. In the "I" section, fragments of these methods will be placed along with the implementation of my stream.

public class Main extends javax.swing.JFrame implements ActionListener, Runnable{
                                          // I added implements ActLis, Runn.....

...

static Main _this;      // I included this variable

...

public static void main(String args[]) {
        Main m = new Main();                               // Added by me
        new Thread(m).start();                             // Added by me
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Main().setVisible(true);
            }
        });
 }

...

public Main() {
        initComponents();
        _this = this;        // Added by me
}


...

// I also included these 2 methods in the class

public void actionPerformed(ActionEvent e) {                                    
    synchronized(this){                                                         
        notifyAll();                                                            
    }                                                                           
}                                                                               

public void run() {                                                             
    try{synchronized(this){wait();}}
    catch (InterruptedException e){}
    progressBar.setValue(50);                                                   
}

...

private void buttonPressed(java.awt.event.MouseEvent evt) {
   for(int i=0; i<=100; i++) {
      for(int j=0; j<=5; j++) {
         // does some work
      }
   run();
   }
}

All I commented on as I added...are the things that I posted in accordance with the tutorials and answers that I saw on the Internet, but nothing works, and it seems to me that I tried to get closer to millions of different combinations ...

Thanks in advance for your help.

Answer 1

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:

public class ProgressBarDemo extends JFrame {
    private final JProgressBar progressBar = new JProgressBar(0, 100);
    private int progressCounter = 0;

    public ProgressBarDemo() {
        setContentPane(progressBar);
        setPreferredSize(new Dimension(100, 100));
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        pack();
        new Thread(new Runnable() {
            public void run() {
                while (progressCounter <= 100) {
                    SwingUtilities.invokeLater(new Runnable() {
                        public void run() {
                            progressBar.setValue(progressCounter++);
                        }
                    });
                    try { Thread.sleep(500); } catch (InterruptedException e) {}
                }
            }
        }).start();
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new ProgressBarDemo().setVisible(true);
            }
        });
    }
}

, SwingWorker:

SwingWorker 1:

    ....
    public ProgressBarDemo() {
        setContentPane(progressBar);
        setPreferredSize(new Dimension(100, 100));
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        pack();

        SwingWorker<Integer, Void> worker = new SwingWorker<Integer,Void>() {
            public Integer doInBackground() {
                while (progressCounter <= 100) {
                    setProgress(progressCounter++);
                    try { Thread.sleep(500); } catch (InterruptedException e) {}
                }
                return 0;
            }
        };
        worker.addPropertyChangeListener(new PropertyChangeListener() {
            public void propertyChange(PropertyChangeEvent event) {
                if ("progress".equals(event.getPropertyName())) {
                    progressBar.setValue((Integer)event.getNewValue());
                }
            }
        });
        worker.execute();
    }
    ....

SwingWorker 2 ( , , , ):

    ....
    public ProgressBarDemo() {
        setContentPane(progressBar);
        setPreferredSize(new Dimension(100, 100));
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        pack();

        new SwingWorker<Integer,Integer>() {
            public Integer doInBackground() { 
                while (progressCounter <= 100) {
                    publish(progressCounter++);
                    try { Thread.sleep(500); } catch (InterruptedException e) {}                    
                }
                return 0;
            }
            public void process(List<Integer> progresses) {
                Integer maxProgress = null;
                for (int progress : progresses) {
                    if (maxProgress == null || progress > maxProgress) {
                        maxProgress = progress;
                    }
                }
                progressBar.setValue(maxProgress);
            }
        }.execute();
    }
    ....

Answer 2

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• Main , .
• run(), , ...

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