Ausführen von TimerTask hinter JFrame in Java

Question

Ich habe ein Problem mit der Anwendung (GUI JFrame Form Class), die ich erstellt habe, ich versuche, eine Methode auszuführen, die Befehle zum Durchführen von Datenscan mit java.util.TimerTask enthält. Die Methode, die ich durchlaufen möchte JCheckBoxMenuItem und wird ausgeführt, wenn ich checkBoxMenuItem ankreuzen. Das Problem ist, dass, wenn ich "checkBoxMenuItem" check, die Scan-Methode noch läuft, aber ich kann nicht wieder auf JFrame (GUI) zugreifen.

import Database.KoneksiDatabase2; 
import Design.ClButtonTransparan; 
import Design.JPanelWithImage; 
import Proses.Data.DebitDiberikan; 
import Proses.Data.DebitKebutuhan; 
import Proses.Data.DebitTersedia; 
import Proses.Data.AutoScanNReply; 
import Proses.Data.CurahHujan; 
import Proses.Data.DataKirim; 
import Proses.Data.DataMasuk; 
import Proses.Data.Faktor_K; 
import java.awt.Color; 
import java.awt.Component; 
import java.awt.Font; 
import java.awt.Graphics2D; 
import java.awt.Image; 
import java.awt.Point; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.event.ItemEvent; 
import java.awt.event.ItemListener; 
import java.awt.image.BufferedImage; 
import java.io.File; 
import java.io.IOException; 
import java.sql.Connection; 
import java.sql.ResultSet; 
import java.sql.SQLException; 
import java.text.SimpleDateFormat; 
import java.util.Date; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
import javax.imageio.ImageIO; 
import javax.swing.ImageIcon; 
import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JMenuItem; 
import javax.swing.JPanel; 
import javax.swing.JPopupMenu; 
import javax.swing.SwingConstants; 
import javax.swing.border.EmptyBorder; 
import javax.swing.border.LineBorder; 
import java.util.Timer; 

public class FormPAI extends javax.swing.JFrame { 
    private JPanel contentPane, panel1, panelJam; 
    private JLabel lbtotQs, lbtotQb, lbtotQa, lbfaktorK, lbQa1, lbQa2, lbQa3; 
    private JLabel lbQa4, lbQa5, lbQa6, lbQa7, lbQa8, lbQa9, lbQa10, lbQa11; 
    private JLabel lbQa12, lbQb1, lbQb2, lbQb3, lbQb4, lbQb5, lbQb6, lbQb7; 
    private JLabel lbQb8, lbQb9, lbQb10, lbQb11, lbQb12, lbTotQ; 
    private JButton btn1, btn2, btn3, btn4, btn5, btn6; 
    //public Timer timer2 = null; 
    private JPopupMenu popUp; 
    private JMenuItem tulisPesan, inbox, kotakKeluar, pesanTerkirim; 
    ActionListener aksi, aksiTulisPesan, aksiInbox, aksikotakKeluar, aksiPesanTerkirim; 
    private Timer timer; 

    public FormPAI() throws IOException, SQLException { 

     initComponents(); 
     setTitle("Pembagian Air Irigasi"); 
     setResizable(false); 
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     setBounds(100, 100, 700, 650); 
     BufferedImage img = ImageIO.read(new File("C:\\Users\\X201\\Documents\\NetBeansProjects\\PembagianAirIrigasi\\src\\img\\bacground3.jpg")); 
     contentPane = new JPanelWithImage(img); 
     contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); 
    setContentPane(contentPane); 
    contentPane.setLayout(null); 
     setLocationRelativeTo(null); 

     btnClose(); 

     BufferedImage imgSkema = ImageIO.read(new File("C:\\Users\\X201\\Documents\\NetBeansProjects\\PembagianAirIrigasi\\src\\img\\baturiti3.png")); 
     panel1 = new JPanelWithImage(resize(imgSkema, 670, 420)); 
     panel1.setBorder(new LineBorder(new Color(0, 0, 0), 1, true)); 
     panel1.setBounds(5, 115, 680, 425); 
     contentPane.add(panel1); 

     ClockLabel dateLable = new ClockLabel("date"); 
     ClockLabel timeLable = new ClockLabel("time"); 
//  ClockLabel dayLable = new ClockLabel("day"); 
     panelJam = new JPanel(); 
     panelJam.setBounds(545, 541, 140, 55); 
     panelJam.setBackground(Color.black); 
     panelJam.add(timeLable); 
     panelJam.add(dateLable); 
//  panelJam.add(dayLable); 
     contentPane.add(panelJam); 

     jCheckBoxMenuItem1.setText("Run Gammu"); 
     jCheckBoxMenuItem1.setSelected(false); 
     jCheckBoxMenuItem1.addItemListener(new ItemListener() { 
      @Override 
      public void itemStateChanged(ItemEvent e) { 
       System.out.println("Checked? " + jCheckBoxMenuItem1.isSelected()); 
       int state = e.getStateChange(); 
       if (state == ItemEvent.SELECTED){ 
        try { 
         scan(); 

        } catch (SQLException ex) { 
         Logger.getLogger(FormPAI.class.getName()).log(Level.SEVERE, null, ex); 
        } 
       }else{ 
        timer.cancel(); 
       } 
      } 
     }); 
    } 

    public void scan() throws SQLException{ 

     java.util.TimerTask task = new java.util.TimerTask() { 
      DebitKebutuhan dk = new DebitKebutuhan(); 
      @Override 
      public void run(){ 
       System.out.println("ajik"); 
       DataMasuk obj = new DataMasuk(); 
       DataKirim dkrm = new DataKirim(); 
       CurahHujan ch = new CurahHujan(); 
       String cek = null, processed=""; 

       try { 
        Connection c = KoneksiDatabase2.getKoneksiDBSMS(); 
        ResultSet rset = c.prepareStatement("SELECT * FROM inbox WHERE Processed='false'").executeQuery(); 
        while (rset.next()){ 
         cek = rset.getString("ID"); 
         processed = rset.getString("Processed"); 
        } 
        if (cek != null){ 
         obj.ambilTeksPesan(); 
         obj.cekFormatPesan(); 
         if (obj.formatSMS == true && processed.equals("false")){ 
          obj.ambilDataPesan(); 
          obj.simpanPesan_ke_DB(); 
          obj.sendToDataMasuk(); 
          obj.updateDataMasuk(); 
          ch.simpanCHKeDB(); 
          dkrm.sendToOutbox(); 
          obj.tandaiSudahDibalas(cek); 
         } 
        } 
        rset.close(); 
       } catch (Exception e) { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
       } 
      } 

     }; 
     timer = new Timer(true);// true to run timer as daemon thread 
     timer.schedule(task, 0, 5000);// Run task every 5 second 
     try { 
      Thread.sleep(60000*60); // Cancel task after 1 minute. 
     } catch (InterruptedException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
     timer.cancel(); 
    } 

    public static BufferedImage resize(BufferedImage img, int newW, int newH) { 
     Image tmp = img.getScaledInstance(newW, newH, Image.SCALE_SMOOTH); 
     BufferedImage dimg = new BufferedImage(newW, newH, BufferedImage.TYPE_INT_ARGB); 

     Graphics2D g2d = dimg.createGraphics(); 
     g2d.drawImage(tmp, 0, 0, null); 
     g2d.dispose(); 

     return dimg; 
    } 


    public final void btnClose(){ 
     ImageIcon idt = new ImageIcon("C:\\Users\\X201\\Documents\\NetBeansProjects\\PembagianAirIrigasi\\src\\img\\exit.png"); 
     Image imgRoll = idt.getImage(); 
     Image newImgRoll = imgRoll.getScaledInstance(65, 65, 100); 
     ImageIcon icon = new ImageIcon("C:\\Users\\X201\\Documents\\NetBeansProjects\\PembagianAirIrigasi\\src\\img\\shutdown.png"); 
     Image img = icon.getImage(); 
     Image newimg = img.getScaledInstance(65, 65, 100); 
     btn6 = new ClButtonTransparan("<html><center>"+"KELUAR"+"</center></html>"); 
     btn6.setFont(new Font("Berlin Sans FB Demi", Font.PLAIN,12)); 
     btn6.setBounds(555, 5, 105, 105); // posisi jbutton (x, y) dan ukurunnnya (lebar, tinggi) 
     btn6.setIcon(new ImageIcon(newimg)); 
     btn6.setRolloverIcon(new ImageIcon (newImgRoll)); 
     btn6.setVerticalTextPosition(SwingConstants.BOTTOM); //membuat text jbutton berada dibawah 
     btn6.setHorizontalTextPosition(SwingConstants.CENTER); //membuat text jbutton berada ditengah 
    contentPane.add(btn6); 
     btn6.addActionListener(new ActionListener() { 
      @Override 
      public void actionPerformed(ActionEvent e) { 
       //JOptionPane.showConfirmDialog(rootPane, menuBar); 
       System.exit(0); 
      } 
     }); 
    } 




    /** 
    * This method is called from within the constructor to initialize the form. 
    * WARNING: Do NOT modify this code. The content of this method is always 
    * regenerated by the Form Editor. 
    */ 
    @SuppressWarnings("unchecked") 
    // <editor-fold defaultstate="collapsed" desc="Generated Code">       
    private void initComponents() { 

     jMenuBar1 = new javax.swing.JMenuBar(); 
     jMenu1 = new javax.swing.JMenu(); 
     jMenu2 = new javax.swing.JMenu(); 
     jCheckBoxMenuItem1 = new javax.swing.JCheckBoxMenuItem(); 

     setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); 

     jMenu1.setText("File"); 
     jMenuBar1.add(jMenu1); 

     jMenu2.setText("Edit"); 

     jCheckBoxMenuItem1.setSelected(true); 
     jCheckBoxMenuItem1.setText("jCheckBoxMenuItem1"); 
     jCheckBoxMenuItem1.addActionListener(new java.awt.event.ActionListener() { 
      public void actionPerformed(java.awt.event.ActionEvent evt) { 
       jCheckBoxMenuItem1ActionPerformed(evt); 
      } 
     }); 
     jMenu2.add(jCheckBoxMenuItem1); 

     jMenuBar1.add(jMenu2); 

     setJMenuBar(jMenuBar1); 

     javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); 
     getContentPane().setLayout(layout); 
     layout.setHorizontalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGap(0, 400, Short.MAX_VALUE) 
     ); 
     layout.setVerticalGroup(
      layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) 
      .addGap(0, 279, Short.MAX_VALUE) 
     ); 

     pack(); 
    }// </editor-fold>       

    private void jCheckBoxMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) {             

    }             

    /** 
    * @param args the command line arguments 
    */ 
    public static void main(String args[]) { 
     /* Set the Nimbus look and feel */ 
     //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) "> 
     /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. 
     * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
     */ 
     try { 
      for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { 
       if ("Nimbus".equals(info.getName())) { 
        javax.swing.UIManager.setLookAndFeel(info.getClassName()); 
        break; 
       } 
      } 
     } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | javax.swing.UnsupportedLookAndFeelException ex) { 
      java.util.logging.Logger.getLogger(FormPAI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
     } 
     //</editor-fold> 

     /* Create and display the form */ 
     java.awt.EventQueue.invokeLater(new Runnable() { 
      @Override 
      public void run() { 
       try{ 
        FormPAI frame = new FormPAI(); 
        frame.setVisible(true); 
        //frame.scan(); 
       }catch(Exception e){ 
       } 
      } 
     }); 
    } 
    // Variables declaration - do not modify      
    private javax.swing.JCheckBoxMenuItem jCheckBoxMenuItem1; 
    private javax.swing.JMenu jMenu1; 
    private javax.swing.JMenu jMenu2; 
    private javax.swing.JMenuBar jMenuBar1; 
    // End of variables declaration     
} 
class ClockLabel extends JLabel implements ActionListener { 

    String type; 
    SimpleDateFormat sdf; 

    public ClockLabel(String type) { 
    this.type = type; 
    setForeground(Color.green); 

    switch (type) { 
     case "day" : sdf = new SimpleDateFormat("EEEE "); 
        setFont(new Font("Digital-7", Font.PLAIN, 14)); 
        setHorizontalAlignment(SwingConstants.RIGHT); 
        break; 
     case "time" : sdf = new SimpleDateFormat("hh:mm a"); 
        setFont(new Font("sans-serif", Font.PLAIN, 16)); 
        setHorizontalAlignment(SwingConstants.CENTER); 
        break; 
     case "date" : sdf = new SimpleDateFormat("dd MMMM yyyy"); 
        setFont(new Font("sans-serif", Font.PLAIN, 20)); 
        setHorizontalAlignment(SwingConstants.CENTER); 
        break; 
     default  : sdf = new SimpleDateFormat(); 
        break; 
    } 

    javax.swing.Timer t = new javax.swing.Timer(1000, this); 
    t.start(); 
    } 

    @Override 
    public void actionPerformed(ActionEvent ae) { 
    Date d = new Date(); 
    setText(sdf.format(d)); 
    } 
} 

Answer 1

Das Problem ist, dass Sie den UI-Thread zu schlafen setzen, und es sieht aus wie Sie länger schlafen als Sie denken, Sie sind ... 60000 * 60 = 1 Stunde!

public void scan() throws SQLException{ 

    java.util.TimerTask task = new java.util.TimerTask() { 
     // ... 
    }; 

    timer = new Timer(true);// true to run timer as daemon thread 
    timer.schedule(task, 0, 5000);// Run task every 5 second 
    try { 
     //-------------------------------------------------- 
     // This is putting the UI to sleep for an hour! 
     //-------------------------------------------------- 
     Thread.sleep(60000*60); // Cancel task after 1 minute. <-- NOT 1 minute! 
    } catch (InterruptedException e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 
    timer.cancel(); 
} 

Sie sollten versuchen, all das Geschäft auf einem separaten Thread zu bekommen. Es könnte wie folgt geschehen:

public void scan() throws SQLException{ 

    Runnable scanRunner = new Runnable() { 
     public void run() { 
      java.util.TimerTask task = new java.util.TimerTask() { 
       // ... 
      }; 

      timer = new Timer(true);// true to run timer as daemon thread 
      timer.schedule(task, 0, 5000);// Run task every 5 second 
      try { 
       Thread.sleep(1000*60); // Cancel task after 1 minute. 
      } catch (InterruptedException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
      timer.cancel(); 
     } 
    }; 

    new Thread(scanRunner).start(); 
} 

Als Randbemerkung, es wahrscheinlich viele andere Fragen gibt es auf diese Art und Weise zu tun, da man konnte die Box in der Benutzeroberfläche in Ihrer Freizeit aktivieren/deaktivieren, und es wäre nicht Stoppen Sie alle vorherigen Scan-Aufgaben ... Ich lasse Sie diese Situation selbst verwalten, oder stellen Sie eine andere Frage.