通過擺動按鈕停止線程

Question

我做了一個簡單的程序，它只是跟蹤鼠標光標的座標 - 它工作正常，我想要做的就是用按鈕啓動/停止它。

到目前爲止，按鈕啓動線程，我可以安全地停止線程的最佳方式是什麼？這是因爲我可能會添加一個工具來將座標寫入文本文件中。

難道我做了一個布爾值，只有當它是真的或類似的東西時才讓線程運行？因爲我試圖編輯觸發器布爾值，但它並沒有影響到什麼。

，因爲它的代碼是：

類運行的線程

public class tester { 

static int startTime = (int) System.currentTimeMillis(); 
static boolean trigger = false; 
static JLabel label = new JLabel(); 
static JLabel status = new JLabel(); 
static mouseLocate msl = new mouseLocate(); 
static JButton startButton = new JButton("Begin tracking"); 
static JButton stopButton = new JButton("Stop Tracker"); 
static Thread myThread = new Thread(new mouseLocate()); 

public static void main(String[] args) { 
    JFrame frame = new JFrame("Mouse Grabber"); 
    frame.setVisible(true); 
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    frame.setSize(500, 100); 
    JPanel panel = new JPanel(); 
    frame.add(panel); 


    panel.add(startButton); 
    startButton.addActionListener(new startAction()); 

    panel.add(label); 
    panel.add(status); 
} 

static class startAction implements ActionListener { 

    public void actionPerformed(ActionEvent e) { 

     try { 

      if (trigger == false) { 
       trigger = true; 
       msl.setTrigger(trigger); 
       //label.setText("Trigger Active" + msl.isTrigger()); 
       startButton.setText("Continue Tracking"); 
      } else if (trigger == true) { 
       trigger = false; 
       //msl.setTrigger(trigger); 
       label.setText("Trigger Inactive"); 
       startButton.setText("Stop Tracking"); 
      } 
     } catch (Exception exp) { 
      System.out.println("EXCEPTION CAUGHT " + e); 
     } 



     //RUN 
     myThread.start(); 


    } 
} 

鼠標定位類：

public class mouseLocate implements Runnable { 

private boolean trigger = false; 
private int startTime = (int) System.currentTimeMillis(); 
static String status = ""; 

public void run() { 
    int x, y; 
    while (mouseGrabber.trigger = true) { 

     try { 
      PointerInfo mouseLocation = MouseInfo.getPointerInfo(); 
      x = mouseLocation.getLocation().x; 
      y = mouseLocation.getLocation().y; 
      System.out.println("X:" + x + " Y:" + y + "  Elapsed time: " 
        + (((int) System.currentTimeMillis() - startTime)/100)); 

     } catch (Exception e) { 
      System.out.println("Exception caught : " + e); 
     } 
    } 

} 

public int getStartTime() { 
    return startTime; 
} 

public void setStartTime(int startTime) { 
    this.startTime = startTime; 
} 

public boolean isTrigger() { 
    return trigger; 
} 

public void setTrigger(boolean trigger) { 
    this.trigger = trigger; 
} 

public static String getStatus() { 
    return status; 
} 

public static void setStatus(String status) { 
    mouseLocate.status = status; 
} 

}

謝謝你的任何幫助，我真的欣賞它。

Answer 1

Java上沒有stopThread（）api了。您應該設置一個標誌爲易失性，並且您的停止線程按鈕只需設置標誌變量值。

public volatile boolean flag; 

public void run() { 
    while(flag) { 
     // Get coordinate or whatever you want  
    } 
} 

Answer 2

public volatile boolean isShutingDown; 



public void run() { 
    while(!isShutingDown) { 

    } 
} 

調用shutdown（）方法，當你需要停止

public void shutDown(){ 

    isShutingDown = true 
    }