Programming Forums > Application Development > Java

fecoooo · Mar 10th, 2012, 2:31 PM

Hi There!

I wrote 2 class, the first is a canvas wich can listen to keyevents, the second is a thread wich sets a boolean variable to true, than 2 secs later to false. While the variable is true, one shouldnt supposed to change anything with a keypress, but one can. How can this be possible? Thanks.

The listeners code.

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@Override  
    public void keyPressed(KeyEvent e) {  
        if(!keyPressed){  
            KeyboardBlocker kBB = new KeyboardBlocker(keyPressed);  
            kBB.start();  
            switch(e.getKeyCode()){  
                case KeyEvent.VK_UP:  
                    rotUpperClockwise(upperRow, CLOCKWISE, 'Z');  
                    break;  
                case KeyEvent.VK_DOWN:  
                    rotUpperClockwise(upperRow, COUNTERCLOCKWISE, 'Z');      
                    break;  
                case KeyEvent.VK_LEFT:  
                    break;  
                case KeyEvent.VK_RIGHT:  
                    break;  
            }  
        }  
    }

the threads code:

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package szakdoga_real;  
  
import java.util.logging.Level;  
import java.util.logging.Logger;  
  
public class KeyboardBlocker extends Thread{  
  
    private Boolean isKeyPressed;  
  
    public KeyboardBlocker(Boolean isKeyPressed) {  
        this.isKeyPressed = isKeyPressed;  
    }  
      
    @Override  
    public void run() {  
        isKeyPressed = true;  
        System.out.println(isKeyPressed);  
        try {  
            Thread.sleep(2000);  
        } catch (InterruptedException ex) {  
            Logger.getLogger(KeyboardBlocker.class.getName()).log(Level.SEVERE, null, ex);  
        }  
        isKeyPressed = false;  
        System.out.println(isKeyPressed);  
    }  
      
}

Mar 10th, 2012, 2:31 PM	#1
fecoooo Newbie Join Date: Mar 2012 Posts: 1 Rep Power: 0	Thread supposed to block keyevents Hi There! I wrote 2 class, the first is a canvas wich can listen to keyevents, the second is a thread wich sets a boolean variable to true, than 2 secs later to false. While the variable is true, one shouldnt supposed to change anything with a keypress, but one can. How can this be possible? Thanks. The listeners code. (Toggle Plain Text) @Override public void keyPressed(KeyEvent e) { if(!keyPressed){ KeyboardBlocker kBB = new KeyboardBlocker(keyPressed); kBB.start(); switch(e.getKeyCode()){ case KeyEvent.VK_UP: rotUpperClockwise(upperRow, CLOCKWISE, 'Z'); break; case KeyEvent.VK_DOWN: rotUpperClockwise(upperRow, COUNTERCLOCKWISE, 'Z'); break; case KeyEvent.VK_LEFT: break; case KeyEvent.VK_RIGHT: break; } } } @Override public void keyPressed(KeyEvent e) { if(!keyPressed){ KeyboardBlocker kBB = new KeyboardBlocker(keyPressed); kBB.start(); switch(e.getKeyCode()){ case KeyEvent.VK_UP: rotUpperClockwise(upperRow, CLOCKWISE, 'Z'); break; case KeyEvent.VK_DOWN: rotUpperClockwise(upperRow, COUNTERCLOCKWISE, 'Z'); break; case KeyEvent.VK_LEFT: break; case KeyEvent.VK_RIGHT: break; } } } the threads code: (Toggle Plain Text) package szakdoga_real; import java.util.logging.Level; import java.util.logging.Logger; public class KeyboardBlocker extends Thread{ private Boolean isKeyPressed; public KeyboardBlocker(Boolean isKeyPressed) { this.isKeyPressed = isKeyPressed; } @Override public void run() { isKeyPressed = true; System.out.println(isKeyPressed); try { Thread.sleep(2000); } catch (InterruptedException ex) { Logger.getLogger(KeyboardBlocker.class.getName()).log(Level.SEVERE, null, ex); } isKeyPressed = false; System.out.println(isKeyPressed); } } package szakdoga_real; import java.util.logging.Level; import java.util.logging.Logger; public class KeyboardBlocker extends Thread{ private Boolean isKeyPressed; public KeyboardBlocker(Boolean isKeyPressed) { this.isKeyPressed = isKeyPressed; } @Override public void run() { isKeyPressed = true; System.out.println(isKeyPressed); try { Thread.sleep(2000); } catch (InterruptedException ex) { Logger.getLogger(KeyboardBlocker.class.getName()).log(Level.SEVERE, null, ex); } isKeyPressed = false; System.out.println(isKeyPressed); } }

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Programming Forums > Application Development > Java

Thread supposed to block keyevents