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Thread: Simple program that detects my keystroke

  1. #1
    Java kindergarten chronoz13's Avatar
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    Default Simple program that detects my keystroke

    how can i code a java program that detects my keystroke?
    for example i press enter,

    the program will display a string message "You Press Enter" + "<Enter key>"

    is it possible to make this algorithm in java?


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    Default Re: Simple program that detects my keystroke

    Check out the robot class, that should do the trick

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    Administrator copeg's Avatar
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    Default Re: Simple program that detects my keystroke

    You can use a KeyListener. You need to have some object that listens for the event, ordinarily a Component (JFrame in the example below) in which you can call addKeyListener(KeyListener) to add the KeyListener implementation.

    public class Test extends JFrame implements KeyListener{
            /**Constructor*/
    	public Test(){
    		super();
    		addKeyListener(this);
    		setVisible(true);
    	}
    	/**Key Listener implementation*/
    	public void keyPressed(KeyEvent e){
    		System.out.println("Key Pressed");
    	}
    	public void keyReleased(KeyEvent e){}
    	public void keyTyped(KeyEvent e){}
     
     
        public static void main(String[] args) {
    		new Test();
        }
     
    }

  4. #4
    Java kindergarten chronoz13's Avatar
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    Default Re: Simple program that detects my keystroke

        public void keyPressed(KeyEvent e){
     
            int id = e.getID();
            String keyString;
     
            if (id == KeyEvent.KEY_TYPED) {
                char c = e.getKeyChar();
                keyString = "key character = '" + c + "'"; // this part
            }
            else {
                int keyCode = e.getKeyCode();
                keyString = "key code = " + keyCode + " (" + KeyEvent.getKeyText(keyCode) + ")";
            }
     
            System.out.println(keyString);
        }

    sir the method only displays an uppercased character ,, if i pressed a lower case character it always
    display it as an uppercased.

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