Can you help me refactor this code:
public void keyPressed(KeyEvent e) { if (e.getKeyCode()==39) { //Right arrow key code } else if (e.getKeyCode()==37) { //Left arrow key code } repaint(); }
Please mention how to check for up/down arrow keys as well.Thanks!
Use KeyEvent. getKeyChar() and KeyEvent. getKeyCode() to find out which key the user pressed.
Conclusion. We can detect arrow key presses by listening to the keydown event. And in the event listener, we can either check the key or keydown properties of the event object to see which key is pressed. And there you have it.
The variables VK_UP , VK_DOWN , VK_LEFT , and VK_RIGHT represent the up, down, left, and right arrow key values respectively.
In Java, there are three types of KeyEvent. The types correspond to pressing a key, releasing a key, and typing a character. The keyPressed method is called when the user presses a key, the keyReleased method is called when the user releases a key, and the keyTyped method is called when the user types a character.
public void keyPressed(KeyEvent e) { int keyCode = e.getKeyCode(); switch( keyCode ) { case KeyEvent.VK_UP: // handle up break; case KeyEvent.VK_DOWN: // handle down break; case KeyEvent.VK_LEFT: // handle left break; case KeyEvent.VK_RIGHT : // handle right break; } }
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