keyeventframe.java

Java灵感编程1-101之21-40

package keyevent;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

/**
 * <p>Title: key Event Demo</p>
 * <p>Description: This is a key Event Demo</p>
 * <p>Copyright: Copyright (c) 2002</p>
 * <p>Company: D6-125</p>
 * @author liujun
 * @version 1.0
 */

public class keyEventFrame extends JFrame {
  JPanel contentPane;
  BorderLayout borderLayout1 = new BorderLayout();
  Label label1 = new Label();
  Label label2 = new Label();

  //Construct the frame
  public keyEventFrame() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    //setIconImage(Toolkit.getDefaultToolkit().createImage(keyEventFrame.class.getResource("[Your Icon]")));
    contentPane = (JPanel) this.getContentPane();
    label1.setFont(new java.awt.Font("Dialog", 0, 16));
    contentPane.setLayout(borderLayout1);
    this.setResizable(false);
    this.setSize(new Dimension(291, 68));
    this.setTitle("key Event Frame Demo");
    this.addKeyListener(new java.awt.event.KeyAdapter() {
      public void keyPressed(KeyEvent e) {
        this_keyPressed(e);
      }
    });
    label2.setBackground(Color.pink);
    label2.setFont(new java.awt.Font("Dialog", 0, 16));
    contentPane.add(label1, BorderLayout.NORTH);
    contentPane.add(label2,  BorderLayout.CENTER);
  }
  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }

  void this_keyPressed(KeyEvent e) {
    String MyString = null , TempS1 = null , TempS2 = null;
    int i,j;
    i = e.getModifiers();   //得到键盘的Modifiers类的字符代码值
    j = e.getKeyCode();    // 获取字符代码值
    TempS1 = e.getKeyModifiersText(i);//将Modifiers类的字符代码值转换为字符串
    TempS2 = e.getKeyText(e.getKeyCode());// 将字符代码转换为字符串
    if (j == e.VK_CONTROL ||j == e.VK_SHIFT ||j == e.VK_ALT ||i == 0)
      MyString = TempS2;  //若无组合键，则取字符
    else
      MyString = TempS1 + " + " + TempS2;// 否则取组合键
    label1.setText(MyString); // 在label1中显示输入的字符或组合键
    label2.setText(label2.getText()+MyString);//在label2中累积输入的字符或组合键
  }
}