Java键盘事件监听(1)

[java]
package com.han;

import java.awt.Container;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SpringLayout;

/**
* 键盘事件监听(1)
* @author HAN
*
*/
public class KeyEvent_1 extends JFrame {

    /**
     *
     */
    private static final long serialVersionUID = -6762512303624322086L;

    public KeyEvent_1() {
        // TODO Auto-generated constructor stub
        Container container = getContentPane();
        SpringLayout springLayout = new SpringLayout();
        container.setLayout(springLayout);
        JLabel remarqueLabel = new JLabel("remarque :");
        JTextArea textArea = new JTextArea(3, 30);
        JScrollPane scrollPane = new JScrollPane();
        scrollPane.setViewportView(textArea);
        container.add(remarqueLabel);
        springLayout.putConstraint(SpringLayout.WEST, remarqueLabel, 5,
                SpringLayout.WEST, container);
        springLayout.putConstraint(SpringLayout.NORTH, remarqueLabel, 5,
                SpringLayout.NORTH, container);
        container.add(scrollPane);
        springLayout.putConstraint(SpringLayout.WEST, scrollPane, 5,
                SpringLayout.EAST, remarqueLabel);
        springLayout.putConstraint(SpringLayout.NORTH, scrollPane, 5,
                SpringLayout.NORTH, container);
        springLayout.putConstraint(SpringLayout.EAST, scrollPane, -5,
                SpringLayout.EAST, container);
        springLayout.putConstraint(SpringLayout.SOUTH, scrollPane, -5,
                SpringLayout.SOUTH, container);

        textArea.addKeyListener(new KeyListener() {

            @Override
            public void keyTyped(KeyEvent e) {
                // TODO Auto-generated method stub
                System.out.println("The charactor you typed : " + "\""
                        + e.getKeyChar() + "\"");
            }

            @Override
            public void keyPressed(KeyEvent e) {
                // TODO Auto-generated method stub

                // 写大写字母时，释放按键是不知道是否先释放的是shift还是字母按键；但是
                // 可以肯定的是按按键时必须是先按的shift。
                if (e.getKeyCode() == KeyEvent.VK_CONTROL ||
                        e.getKeyCode() == KeyEvent.VK_SHIFT ||
                        e.getKeyCode() == KeyEvent.VK_ALT) {
                    System.out.println("\n" + "The Component triggered : " + e.getSource());
                }
                if (!(e.isControlDown() || e.isShiftDown() || e.isAltDown())) {
                    System.out.println("\n" + "The Component triggered : " + e.getSource());
                }
                String keyText = KeyEvent.getKeyText(e.getKeyCode());
                if (e.isActionKey()) {
                    System.out.print("The action key you pressed : " + "\""
                            + keyText + "\"");
                } else {
                    System.out.print("The non-action key you pressed : " + "\""
                            + keyText + "\"");
                    int keyCode = e.getKeyCode();
                 &nbs

补充：软件开发 , Java ,