jnotepadui.java

一、光盘名称 《Java JDK 6 学习笔记》配书CD-ROM 二、光盘内容 本光盘中包含了书中所有实例的源代码和一些简单操作设置的视频文件。 Example文件夹：书中所有

package onlyfun.caterpillar;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Font;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;

import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.KeyStroke;
import javax.swing.ScrollPaneConstants;
import javax.swing.SwingConstants;

public class JNotePadUI extends JFrame {
    public JNotePadUI() {
        super("新建文本文件");
        setUpUIComponent();
        setUpEventListener();
        setVisible(true);
    }
    
    private void setUpUIComponent() {
        setSize(640, 480);
        
        // 菜单栏
        JMenuBar menuBar = new JMenuBar();
        
        // 设置「文件」菜单
        JMenu fileMenu = new JMenu("文件");
        JMenuItem menuOpen = new JMenuItem("打开");
        // 快捷键设置
        menuOpen.setAccelerator(
                    KeyStroke.getKeyStroke(
                            KeyEvent.VK_O, 
                            InputEvent.CTRL_MASK));
        JMenuItem menuSave = new JMenuItem("保存");
        menuSave.setAccelerator(
                    KeyStroke.getKeyStroke(
                            KeyEvent.VK_S, 
                            InputEvent.CTRL_MASK));
        JMenuItem menuSaveAs = new JMenuItem("另存为");

        JMenuItem menuClose = new JMenuItem("关闭");
        menuClose.setAccelerator(
                    KeyStroke.getKeyStroke(
                            KeyEvent.VK_Q, 
                            InputEvent.CTRL_MASK));
        
        fileMenu.add(menuOpen);
        fileMenu.addSeparator(); // 分隔线
        fileMenu.add(menuSave);
        fileMenu.add(menuSaveAs);        
        fileMenu.addSeparator(); // 分隔线
        fileMenu.add(menuClose);
        
        // 设置「编辑」菜单        
        JMenu editMenu = new JMenu("编辑");
        JMenuItem menuCut = new JMenuItem("剪切");
        menuCut.setAccelerator(
                    KeyStroke.getKeyStroke(KeyEvent.VK_X, 
                            InputEvent.CTRL_MASK));
        JMenuItem menuCopy = new JMenuItem("复制");
        menuCopy.setAccelerator(
                    KeyStroke.getKeyStroke(KeyEvent.VK_C, 
                            InputEvent.CTRL_MASK));
        JMenuItem menuPaste = new JMenuItem("粘贴");
        menuPaste.setAccelerator(
                    KeyStroke.getKeyStroke(KeyEvent.VK_V, 
                            InputEvent.CTRL_MASK));
        editMenu.add(menuCut);
        editMenu.add(menuCopy);
        editMenu.add(menuPaste);
        
        // 设置「关于」菜单        
        JMenu aboutMenu = new JMenu("关于");
        JMenuItem menuAbout = new JMenuItem("关于JNotePad");
        aboutMenu.add(menuAbout);
        
        menuBar.add(fileMenu);
        menuBar.add(editMenu);
        menuBar.add(aboutMenu);

        
        setJMenuBar(menuBar);
        
        // 文字编辑区域
        JTextArea textArea = new JTextArea();
        textArea.setFont(new Font("宋体", Font.PLAIN, 16));
        textArea.setLineWrap(true);
        JScrollPane panel = new JScrollPane(textArea,
          ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
          ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        
        Container contentPane = getContentPane();
        contentPane.add(panel, BorderLayout.CENTER);  
        
        // 状态栏
        JLabel stateBar = new JLabel("未修改");
        stateBar.setHorizontalAlignment(SwingConstants.LEFT); 
        stateBar.setBorder(
                BorderFactory.createEtchedBorder());
        contentPane.add(stateBar, BorderLayout.SOUTH);        
    }

    
    private void setUpEventListener() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

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