If the user wants to process keystrokes, which methods of the KeyListener interface must be implemented?
A)Only the keyTyped method
B)keyPressed and keyReleased
C)keyPressed, keyReleased, and keyTyped
D)Only the keyPressed method

Question

Quizplus · Accepted Answer

All three methods keyPressed, keyReleased, and keyTyped must be implemented for complete handling of keystrokes. The keyPressed method is called when a key is pressed down, the keyReleased method is called when the key is released, and the keyTyped method is called when a key actually changes the state of the system input buffer. By implementing all three methods, the programmer can control the processing flow of keystrokes fully.

If the User Wants to Process Keystrokes, Which Methods of the KeyListener