Question

我想在特定的时间间隔内调用我的函数。现在我的时间间隔固定为1分钟。我有以下代码示例：

Timer.java

import java.util.Date;

import java.util.logging.Level;

import java.util.logging.Logger;

public class Timer implements Runnable{
    public static volatile boolean isRunning = true;

    @Override
    public void run() {
        while (isRunning) {    
            if(Thread.currentThread().getName().equals("TimerThread")){
                System.out.println("Start Time "+new Date());

                try {
                    test();
                    Thread.sleep(60000);
                } catch (InterruptedException ex) {
                    Logger.getLogger(Timer.class.getName()).log(Level.SEVERE, null, ex);
                }

                System.out.println("End Time "+new Date());    
            }
        }
    }

    public void test(){
        System.out.println("Call Test ===========================> "+new Date());
    }
}

NewJFrame.java

import java.awt.event.ItemEvent;

import java.util.Date;

public class NewJFrame extends javax.swing.JFrame {

    /**
     * Creates new form NewJFrame
     */
    public NewJFrame() {
        initComponents();
    }

    /**
     * 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() {

        jToggleButton1 = new javax.swing.JToggleButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jToggleButton1.setText("Start");
        jToggleButton1.addItemListener(new java.awt.event.ItemListener() {
            public void itemStateChanged(java.awt.event.ItemEvent evt) {
                jToggleButton1ItemStateChanged(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(162, 162, 162)
                .addComponent(jToggleButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 100, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(138, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(129, 129, 129)
                .addComponent(jToggleButton1)
                .addContainerGap(142, Short.MAX_VALUE))
        );

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

    private void jToggleButton1ItemStateChanged(java.awt.event.ItemEvent evt) {                                                
        // TODO add your handling code here:
        if(evt.getStateChange() == ItemEvent.SELECTED){
            jToggleButton1.setText("Stop");
            timer = new Timer();
            timer.isRunning = true;
            timerThread = new Thread(timer);
            timerThread.setName("TimerThread");
            timerThread.start();
        }else{
            jToggleButton1.setText("Start");
            timer.isRunning = false;
            System.out.println("Stop Time ===============> "+new Date());
        }
    }                                               

    /**
     * @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 ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new NewJFrame().setVisible(true);
            }
        });
    }
    public Timer timer;
    public Thread timerThread;
    // Variables declaration - do not modify                     
    private javax.swing.JToggleButton jToggleButton1;
    // End of variables declaration                   
}

当我启动线程时，我会得到以下输出：

Start Time Sat Aug 08 10:45:01 IST 2015
Call Test ===========================> Sat Aug 08 10:45:01 IST 2015

一旦时间间隔完成，我得到以下输出：

End Time Sat Aug 08 10:46:01 IST 2015
Start Time Sat Aug 08 10:46:01 IST 2015
Call Test ===========================> Sat Aug 08 10:46:01 IST 2015

之后我在00:00:30秒停止了我的线程，所以我会得到以下输出：

Stop Time ===============> Sat Aug 08 10:46:31 IST 2015

我已经在00:00:30秒停止了我的主题但我的功能在00:00:30之后自动调用

任何人都可以帮助我固定时间间隔 调用任何功能线程就像当我点击开始按钮然后我的线程将启动并调用功能然后等待2分钟。 2分钟后再次调用我的功能并重复循环。如果我单击停止按钮，则线程将停止，直到我将使用“开始”按钮启动“线程”。

Answer 1

正确答案是：不要使用Thread。使用Timer，SwingTimer或ScheduledExecutorService取决于您希望Thread做什么。

要回答实际问题，请检查isRunning并在睡眠完成后立即退出。你也可以向线程发送一个中断，以便在你想要的时候立即停止睡眠。

使用线程

1 个答案: