私はjava.util.timerを使ってタスクを定期的にスケジュールしようとしています。私はどうすればよいか分かりません

Question

私は一定の時間（例えば、Quartz、ScheduledThreadPool、java.util.timer）の後にタスクをスケジュールするためにいくつかの異なる方法を研究しています。 。

私の研究で見つけた例ですが、下に私が作成しているコードを挿入します。 --->

import java.util.Timer; 
 
import java.util.TimerTask; 
 

 
public class TaskManager { 
 

 
    private Timer timer = new Timer(); 
 

 
    public static void main(String[] args) { 
 
     TaskManager manager = new TaskManager(); 
 
     manager.startTask(); 
 
    } 
 

 
    public void startTask() { 
 
     timer.schedule(new PeriodicTask(), 0); 
 
    } 
 

 
    private class PeriodicTask extends TimerTask { 
 
     @Override 
 
     public void run() { 
 
      System.out.println(System.currentTimeMillis() + " Running"); 
 

 
      /* replace with the actual task */ 
 
      try { 
 
       Thread.sleep(15 * 1000); 
 
      } catch(InterruptedException e) { 
 
       e.printStackTrace(); 
 
      } 
 
      /* end task processing */ 
 

 
      System.out.println(System.currentTimeMillis() + " Scheduling 10 seconds from now"); 
 
      timer.schedule(new PeriodicTask(), 10 * 1000); 
 
     } 
 
    } 
 
}

GUIアプリケーション法を無視してください、私はちょうど明確にするためにそれを挿入します。また、私は自分のコードが未編成であるかもしれないことを理解していますので、事前に申し訳ありません。

基本的に私は3つのフレームでGUIを作成しました。最初はちょうど開始フレームなので無視することができます。 2番目のフレームは基本的にタイマーを使用するフレームです。何をしようとしているのは、12個のJButtonの配列に1から12までの12個の乱数を表示するメモリゲームを作成してから、指定した時間が経過した後に番号を削除したり隠したりします。演奏している人は昇順にクリックしなければなりません。その人が正しくクリックした場合は1点を、そうでない場合はポイントを取得しません。彼は「アンサーを確認」ボタンをクリックすると、数字がリセットされ、タイマーが再び始まります。これは15回しか起こりません。

私が必要とするすべてのヘルプは、timer属性を実装するだけです。これを読む時間がかかる人に感謝します。あなたは命の恩人です！

// The "TryTryTryAgain" class. 
 
import javax.swing.*; 
 
import java.awt.*; 
 
import java.awt.event.*; 
 
import java.applet.*; 
 
import java.net.URL; 
 
import java.util.Arrays; 
 
import java.util.TimerTask; 
 
import java.util.Date; 
 
import java.util.Timer; 
 

 

 
public class JavaMemoryGame_Final { 
 
    static JButton btnStart, buttonArray[] = new JButton[12]; 
 
    static JFrame start, questions, survey; 
 
    static JTextField nameEnter; 
 
    static JLabel scoreOutput, lblTitle, lblPrompt1, lblPrompt2, t_fImage, lblInstruct, lblReadyCheck; 
 
    static JRadioButton reallyBad, bad, good, reallyGood; 
 
    static AudioClip clap, yess, noo; 
 
    static ButtonGroup finalSurvey; 
 
    static DefaultListModel listModel; 
 
    static JList difficulty; 
 
    static int randNumGenerator; 
 
    static int score = 0, arrayImage[] = new int[12]; 
 

 

 
    private Timer timer = new Timer(); 
 

 

 
    public static JButton[] randNum() { 
 

 
    arrayImage[0] = (int)(Math.random() * 12) + 1; 
 
    arrayImage[1] = (int)(Math.random() * 12) + 1; 
 
    while (arrayImage[1] == arrayImage[0]) { 
 
     arrayImage[1] = (int)(Math.random() * 12) + 1; 
 
    } 
 
    arrayImage[2] = (int)(Math.random() * 12) + 1; 
 
    while (arrayImage[2] == arrayImage[1] || arrayImage[2] == arrayImage[0]) { 
 
     arrayImage[2] = (int)(Math.random() * 12) + 1; 
 
    } 
 
    arrayImage[3] = (int)(Math.random() * 12) + 1; 
 
    while (arrayImage[3] == arrayImage[2] || arrayImage[3] == arrayImage[1] || arrayImage[3] == arrayImage[0]) { 
 
     arrayImage[3] = (int)(Math.random() * 12) + 1; 
 
    } 
 
    arrayImage[4] = (int)(Math.random() * 12) + 1; 
 
    while (arrayImage[4] == arrayImage[3] || arrayImage[4] == arrayImage[2] || arrayImage[4] == arrayImage[1] || arrayImage[4] == arrayImage[0]) { 
 
     arrayImage[4] = (int)(Math.random() * 12) + 1; 
 
    } 
 
    arrayImage[5] = (int)(Math.random() * 12) + 1; 
 
    while (arrayImage[5] == arrayImage[4] || arrayImage[5] == arrayImage[3] || arrayImage[5] == arrayImage[2] || arrayImage[5] == arrayImage[1] || arrayImage[5] == arrayImage[0]) { 
 
     arrayImage[5] = (int)(Math.random() * 12) + 1; 
 
    } 
 
    arrayImage[6] = (int)(Math.random() * 12) + 1; 
 
    while (arrayImage[6] == arrayImage[5] || arrayImage[6] == arrayImage[4] || arrayImage[6] == arrayImage[3] || arrayImage[6] == arrayImage[2] || arrayImage[6] == arrayImage[1] || arrayImage[6] == arrayImage[0]) { 
 
     arrayImage[6] = (int)(Math.random() * 12) + 1; 
 
    } 
 
    arrayImage[7] = (int)(Math.random() * 12) + 1; 
 
    while (arrayImage[7] == arrayImage[6] || arrayImage[7] == arrayImage[5] || arrayImage[7] == arrayImage[4] || arrayImage[7] == arrayImage[3] || arrayImage[7] == arrayImage[2] || arrayImage[7] == arrayImage[1] || arrayImage[7] == arrayImage[0]) { 
 
     arrayImage[7] = (int)(Math.random() * 12) + 1; 
 
    } 
 
    arrayImage[8] = (int)(Math.random() * 12) + 1; 
 
    while (arrayImage[8] == arrayImage[7] || arrayImage[8] == arrayImage[6] || arrayImage[8] == arrayImage[5] || arrayImage[8] == arrayImage[4] || arrayImage[8] == arrayImage[3] || arrayImage[8] == arrayImage[2] || arrayImage[8] == arrayImage[1] || arrayImage[8] == arrayImage[0]) { 
 
     arrayImage[8] = (int)(Math.random() * 12) + 1; 
 
    } 
 
    arrayImage[9] = (int)(Math.random() * 12) + 1; 
 
    while (arrayImage[9] == arrayImage[8] || arrayImage[9] == arrayImage[7] || arrayImage[9] == arrayImage[6] || arrayImage[9] == arrayImage[5] || arrayImage[9] == arrayImage[4] || arrayImage[9] == arrayImage[3] || arrayImage[9] == arrayImage[2] || arrayImage[9] == arrayImage[1] || arrayImage[9] == arrayImage[0]) { 
 
     arrayImage[9] = (int)(Math.random() * 12) + 1; 
 
    } 
 
    arrayImage[10] = (int)(Math.random() * 12) + 1; 
 
    while (arrayImage[10] == arrayImage[9] || arrayImage[10] == arrayImage[8] || arrayImage[10] == arrayImage[7] || arrayImage[10] == arrayImage[6] || arrayImage[10] == arrayImage[5] || arrayImage[10] == arrayImage[4] || arrayImage[10] == arrayImage[3] || arrayImage[10] == arrayImage[2] || arrayImage[10] == arrayImage[1] || arrayImage[10] == arrayImage[0]) { 
 
     arrayImage[10] = (int)(Math.random() * 12) + 1; 
 
    } 
 
    arrayImage[11] = (int)(Math.random() * 12) + 1; 
 
    while (arrayImage[11] == arrayImage[10] || arrayImage[11] == arrayImage[9] || arrayImage[11] == arrayImage[8] || arrayImage[11] == arrayImage[7] || arrayImage[11] == arrayImage[6] || arrayImage[11] == arrayImage[5] || arrayImage[11] == arrayImage[4] || arrayImage[11] == arrayImage[3] || arrayImage[11] == arrayImage[2] || arrayImage[11] == arrayImage[1] || arrayImage[11] == arrayImage[0]) { 
 
     arrayImage[11] = (int)(Math.random() * 12) + 1; 
 
    } 
 

 
    for (int x = 0; x <= 11; x++) { 
 
     buttonArray[x] = new JButton("" + arrayImage[x]); 
 
     buttonArray[x].setBackground(Color.orange); 
 
    } 
 
    for (int i = 0; i <= 11; i++) { 
 
     buttonArray[i].setActionCommand("" + arrayImage[i]); 
 

 
    } 
 

 
    return buttonArray; 
 
    } 
 

 

 
    private static void guiApp() { 
 

 
    start = new JFrame("Welcome"); 
 
    start.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
 
    questions = new JFrame("Memry_Game"); 
 
    questions.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
 
    survey = new JFrame("How Was It?"); 
 
    survey.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
 
    btnStart = new JButton("Enter"); 
 

 
    lblTitle = new JLabel("Memory Match Game!"); 
 
    lblInstruct = new JLabel("Welcome to the Memory Match Game!"); 
 
    lblPrompt1 = new JLabel("Please enter your first name:"); 
 
    lblPrompt2 = new JLabel("Choose Difficulty (#of seconds):"); 
 
    nameEnter = new JTextField(""); 
 
    scoreOutput = new JLabel("Score: " + score + "/15"); 
 
    reallyBad = new JRadioButton("Really Bad"); 
 
    bad = new JRadioButton("Bad"); 
 
    good = new JRadioButton("Good"); 
 
    reallyGood = new JRadioButton("Really Good"); 
 
    lblReadyCheck = new JLabel(""); 
 

 
    finalSurvey = new ButtonGroup(); 
 
    finalSurvey.add(reallyBad); 
 
    finalSurvey.add(bad); 
 
    finalSurvey.add(good); 
 
    finalSurvey.add(reallyGood); 
 

 

 

 
    //Declare Audio 
 
    /*URL ebob = JavaMemoryGame_Final.class.getResource (""); 
 
    clap = Applet.newAudioClip (ebob); 
 
    URL bob = JavaMemoryGame_Final.class.getResource ("yes-1.wav"); 
 
    yess = Applet.newAudioClip (bob); 
 
    URL tom = JavaMemoryGame_Final.class.getResource ("no-6.wav"); 
 
    noo = Applet.newAudioClip (tom);*/ 
 

 
    //set up radio buttons 
 
    finalSurvey = new ButtonGroup(); 
 
    finalSurvey.add(reallyBad); 
 
    finalSurvey.add(bad); 
 
    finalSurvey.add(good); 
 
    finalSurvey.add(reallyGood); 
 

 
    //Set Up List Model 
 
    listModel = new DefaultListModel(); 
 
    listModel.addElement("10"); 
 
    listModel.addElement("15"); 
 
    listModel.addElement("30"); 
 

 
    //Set Up List 
 
    difficulty = new JList(listModel); 
 
    difficulty.setVisibleRowCount(1); 
 
    JScrollPane listScroll = new JScrollPane(difficulty); 
 

 

 

 
    for (int x = 0; x <= 11; x++) { 
 
     buttonArray[x] = new JButton(""); 
 
     buttonArray[x].setBackground(Color.orange); 
 
    } 
 

 

 
    ButtonHandler onClick = new ButtonHandler(); 
 
    btnStart.addActionListener(onClick); 
 
    for (int y = 0; y <= 11; y++) { 
 
     buttonArray[y].addActionListener(onClick); 
 
    } 
 

 

 

 
    JPanel mainStart = new JPanel(new BorderLayout()); 
 
    mainStart.setBackground(Color.orange); 
 
    mainStart.setForeground(Color.orange); 
 
    JPanel scoreStuffs = new JPanel(new GridLayout(1, 2)); 
 
    JPanel mainContent = new JPanel(new GridLayout(2, 2)); 
 
    mainContent.setBackground(Color.orange); 
 
    mainStart.setForeground(Color.orange); 
 
    JPanel gameBoard = new JPanel(new GridLayout(2, 6)); 
 
    gameBoard.setBackground(Color.orange); 
 
    JPanel gameContent = new JPanel(new GridLayout(1, 2)); 
 
    JPanel mainGame = new JPanel(new BorderLayout()); 
 
    mainGame.setBackground(Color.orange); 
 
    JPanel buttonScore = new JPanel(new GridLayout(3, 1)); 
 
    buttonScore.setBackground(Color.orange); 
 
    JPanel feedbackPanel = new JPanel(new BorderLayout()); 
 
    feedbackPanel.setForeground(Color.blue); 
 

 

 

 
    //Seperate Panels 
 
    mainContent.add(lblPrompt1); 
 
    mainContent.add(lblPrompt2); 
 
    mainContent.add(nameEnter); 
 
    mainContent.add(listScroll); 
 

 
    //Score Stuff for main Panel 
 
    scoreStuffs.add(scoreOutput); 
 
    scoreStuffs.add(btnStart); 
 

 

 
    //Main Welcome PAnel 
 
    mainStart.add(lblInstruct, BorderLayout.NORTH); 
 
    mainStart.add(mainContent, BorderLayout.CENTER); 
 
    mainStart.add(scoreStuffs, BorderLayout.SOUTH); 
 

 

 
    //GAme Board 
 
    gameContent.add(btnStart); 
 
    gameContent.add(scoreOutput); 
 
    gameBoard.add(buttonArray[0]); 
 
    gameBoard.add(buttonArray[1]); 
 
    gameBoard.add(buttonArray[2]); 
 
    gameBoard.add(buttonArray[3]); 
 
    gameBoard.add(buttonArray[4]); 
 
    gameBoard.add(buttonArray[5]); 
 
    gameBoard.add(buttonArray[6]); 
 
    gameBoard.add(buttonArray[7]); 
 
    gameBoard.add(buttonArray[8]); 
 
    gameBoard.add(buttonArray[9]); 
 
    gameBoard.add(buttonArray[10]); 
 
    gameBoard.add(buttonArray[11]); 
 

 

 
    mainGame.add(gameBoard, BorderLayout.CENTER); 
 
    mainGame.add(gameContent, BorderLayout.PAGE_END); 
 

 

 

 
    Container contentPane = start.getContentPane(); 
 
    contentPane.add(mainStart); 
 
    Container contentPane1 = questions.getContentPane(); 
 
    contentPane1.add(mainGame); 
 
    Container contentPane2 = survey.getContentPane(); 
 
    contentPane2.add(feedbackPanel); 
 
    start.setSize(600, 450); 
 
    start.setVisible(true); 
 
    questions.setSize(500, 250); 
 
    questions.setVisible(true); 
 
    survey.setSize(600, 450); 
 
    survey.setVisible(true); 
 

 

 

 
    } 
 

 

 

 

 
    private static class ButtonHandler implements ActionListener { 
 
    public void actionPerformed(ActionEvent e) { 
 
     String textFieldValue = nameEnter.getText(); 
 
     int index = difficulty.getSelectedIndex(); 
 
     int selected = difficulty.getSelectedValue().toInt(); 
 
     int check = 0; 
 

 
     while (check == 0) { 
 
     if (e.getSource() == ("Enter") && textFieldValue.length() != 0 && index > 0) { 
 
      lblPrompt1.setText("Thank You!"); 
 
      lblPrompt2.setText("Thank You!"); 
 
      btnStart.setText("Start?"); 
 
      check = check + 1; 
 
     } else if (e.getSource() == ("Enter") && textFieldValue.length() == 0) { 
 
      lblPrompt1.setText("Enter first name before continuing!"); 
 
      btnStart.setText("Check"); 
 
     } 
 
     } 
 

 
     if (e.getSource() == ("Start?")) { 
 
     start.setVisible(false); 
 
     questions.setVisible(true); 
 

 
     } 
 

 

 

 

 

 
    } 
 
    } 
 

 

 
    public void startTask() { 
 
    timer.schedule(new PeriodicTask(), 0); 
 
    } 
 

 

 

 
    private class PeriodicTask extends TimerTask {@ 
 
    Override 
 
    public void run() { 
 
     System.out.println(System.currentTimeMillis() + " Running"); 
 

 
     /* replace with the actual task */ 
 
     try { 
 
     Thread.sleep(15 * 1000); 
 
     } catch (InterruptedException e) { 
 
     e.printStackTrace(); 
 
     } 
 
     /* end task processing */ 
 

 
     System.out.println(System.currentTimeMillis() + " Scheduling 10 seconds from now"); 
 
     timer.schedule(new PeriodicTask(), 10 * 1000); 
 
    } 
 
    } 
 

 

 

 
    public static void main(String[] args) { 
 
     javax.swing.SwingUtilities.invokeLater(new Runnable() { 
 
      public void run() { 
 
      guiApp(); 
 
      } 
 
     } 
 

 

 
    ); 
 

 

 
    } // main method 
 
} // TryTryTryAgain class

Answer 1

使用java.awt.event.ActionListener。

import java.awt.event.*; 
Timer t = new Timer(10, //will run every 10 ms 
        new Listener()); 
t.start(); 

private class Listener implements ActionListener { 
    @Override 
    public void actionPerformed(ActionEvent e){ 
     //Code here will execute every (10) ms. 
    } 
} 

Answer 2

私はいくつかの混乱があると信じています。 Timerクラスは、新しいスレッドを作成し、そのスレッド上のタスクを将来指定された時間に実行するか、指定された間隔で繰り返し実行します。次のコードでは、2秒間隔で赤い点を移動するSwingクラスについて説明します。 Thread.sleepメソッドは、それが含まれているスレッドを指定された期間待機させます。 （スリープはさまざまなイベントによって中断される可能性があります）。遅延のゼロはタスクがゼロ遅延で実行されることを意味するため、最初にタイマーを使用するのはダミーです。

PeriodicTaskクラスはメッセージを出力し、15秒間待機し、メッセージを出力し、10秒後にタスクの繰り返しをスケジュールしてから終了します。

package bradleyross.swing; 
import java.awt.Color; 
import java.awt.Dimension; 
import java.awt.FlowLayout; 
import java.awt.event.ActionListener; 
import java.awt.event.ActionEvent; 
import java.awt.event.KeyListener; 
import java.lang.reflect.InvocationTargetException; 
import java.awt.event.KeyEvent; 
import java.awt.Graphics; 
import javax.swing.BorderFactory; 
import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.JButton; 
import javax.swing.SwingUtilities; 
import java.util.Random; 
import java.util.Timer; 
import java.util.TimerTask; 
/** 
* This Swing demo creates a JPanel component and randomly 
* moves a red dot within the panel when triggered by a 
* timer. 
* 
* @author Bradley Ross 
* 
*/ 
public class SwingTimer implements Runnable{ 
    protected JFrame mainFrame; 
    protected FlowLayout layout; 
    protected MyPanel panel; 
    protected int xPos = 0; 
    protected int yPos = 0; 
    protected Random random = new Random(); 
    protected Timer timer = new Timer(); 
    public void run() { 
     buildFrame(); 
    } 
    /** 
    * Action listener for this application. 
    * @author Bradley Ross 
    * 
    */ 
    protected class Listener1 implements ActionListener { 

     public void actionPerformed(ActionEvent e) { 
      System.out.println("Action " + e.getActionCommand()); 
     } 

    } 
    /** 
    * Key listener for this application. 
    * @author Bradley Ross 
    * 
    */ 
    protected class Listener2 implements KeyListener { 
     /** 
     * Action when key event is detected. 
     * @param e key event 
     */ 
     public void keyTyped(KeyEvent e) { 
      System.out.println("Keystroke received " + e.getKeyChar()); 
     } 
     public void keyPressed(KeyEvent e) { ; } 
     public void keyReleased(KeyEvent e) { ; } 

    } 
    /** 
    * This subclass of JPanel repaints the 
    * the dot using {@link SwingTimer#xPos} and 
    * {@link SwingTimer#yPos}. 
    * 
    * @author Bradley Ross 
    * 
    */ 
    @SuppressWarnings("serial") 
    public class MyPanel extends JPanel { 
     public void paintComponent(Graphics g) { 
      super.paintComponent(g); 
      g.fillOval(xPos, yPos, 5, 5); 
     } 
    } 
    /** 
    * Executed each time the timer triggers an event. 
    * 
    * <p>It randomly repositions the dot within the 
    * panel.</p> 
    * @author Bradley Ross 
    * 
    */ 
    public class Motion extends TimerTask { 
     public void run() { 
      xPos = random.nextInt(300); 
      yPos = random.nextInt(300); 
      panel.repaint(); 
     } 
    } 
    public void buildFrame() { 
     xPos = random.nextInt(300); 
     yPos = random.nextInt(300); 
     KeyListener listener2 = new Listener2(); 
     ActionListener listener1 = new Listener1(); 
     mainFrame = new JFrame(); 
     layout = new FlowLayout(FlowLayout.LEADING); 
     mainFrame.setLayout(layout); 
     mainFrame.addKeyListener(listener2); 
     JButton first = new JButton("First"); 
     first.setActionCommand("first"); 
     first.addActionListener(listener1); 
     first.addKeyListener(listener2); 
     first.setFocusable(false); 
     mainFrame.add(first); 
     mainFrame.setFocusable(true); 
     panel = new MyPanel(); 
     panel.setBorder(BorderFactory.createLineBorder(Color.black)); 
     panel.setPreferredSize(new Dimension(300,300)); 
     panel.setForeground(Color.red); 
     panel.addKeyListener(listener2); 
     panel.repaint(); 
     timer.scheduleAtFixedRate(new Motion(), 0 , 2000); 
     mainFrame.add(panel); 
     mainFrame.setSize(500, 500); 
     mainFrame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); 
     mainFrame.setVisible(true); 
    } 
    /** 
    * Main driver. 
    * @param args not used in this example 
    */ 
    public static void main(String[] args) { 
     try { 
      SwingUtilities.invokeAndWait(new SwingTimer()); 
     } catch (InvocationTargetException e) { 
      e.printStackTrace(); 
     } catch (InterruptedException e) { 
      e.printStackTrace(); 
     } 
    } 
}