GUI事件监听键盘监听器

	public static void main(String[] args) {
		new KeyListenerDemo();
	}

	private Frame f;
	private TextField tf;
	private Button but;

	KeyListenerDemo() {
		init();
	}

	private void init() {
		f = new Frame("myFrame");
		f.setBounds(300, 250, 400, 250);
		f.setLayout(new FlowLayout());
		f.addWindowListener(new WindowAdapter() {

			@Override
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}

		});
		tf = new TextField(25);
		but = new Button("button");
		myEvent_1();
		myEvent_2();
		f.add(tf);
		f.add(but);
		f.setVisible(true);
	}

	private void myEvent_2() {
		but.addMouseListener(new MouseAdapter() {
			int count = 0;

			@Override
			public void mouseClicked(MouseEvent e) {
				e.getClickCount();
				tf.setText(String.valueOf(count++));
			}

		});
	}


	private void myEvent_1() {
		tf.addKeyListener(new KeyAdapter() {

			@Override
			public void keyPressed(KeyEvent e) {
				int code = e.getKeyCode();//返回与键关联的整数
				if (!(code >= KeyEvent.VK_0 && code <= KeyEvent.VK_9))
					e.consume();//不执行事件源代码
				if (e.getKeyCode() == KeyEvent.VK_ENTER && e.isControlDown())
					System.out.println("run run");
				//getkeyText（code）返回与该code关联的字符，如code为65，则返回A
				System.out.println(KeyEvent.getKeyText(code) + "..." + code);
			}
		});
	}