Method keyPressed

day25/code/day25_Frame/src/cn/itcast_06/KeyDemo.java:42–50

(KeyEvent e)

		tf.addKeyListener(new KeyAdapter() {
			@Override
			public void keyPressed(KeyEvent e) {
				// public char getKeyChar()
				char ch = e.getKeyChar();
				if (!(ch >= KeyEvent.VK_0 && ch <= KeyEvent.VK_9)) {
					System.out.println("��������ǣ�" + ch);
					e.consume();
				}
			}
		});

		// ���ÿɼ�