java做的简易记事本含快捷键 查找 替换等

这是一个简易记事本，仿制windows记事本的，包括文件（新建，打开，保存，另存为，退出），编辑（查找，替换），格式（换行，字体颜色），帮助，在文本框点击鼠标右键，显示撤销，复制，剪切，粘贴，全选等功能，另外还添加了部分快捷键功能，由于做的功能不全，可能会有些缺点，请大家批评指正

package lwz;

import java.awt.Button;

import java.awt.Color;

import https://www.360docs.net/doc/2c1441555.html,ponent;

import java.awt.Dialog;

import java.awt.Event;

import java.awt.Font;

import java.awt.Frame;

import java.awt.GraphicsEnvironment;

import https://www.360docs.net/doc/2c1441555.html,bel;

import java.awt.TextArea;

import java.awt.TextField;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.KeyEvent;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.awt.event.WindowListener;

import java.io.File;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JCheckBox;

import javax.swing.JColorChooser;

import javax.swing.JComboBox;

import javax.swing.JFileChooser;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JMenu;

import javax.swing.JMenuBar;

import javax.swing.JMenuItem;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JPopupMenu;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import javax.swing.JTextField;

import javax.swing.KeyStroke;

import javax.swing.SwingUtilities;

import javax.swing.UIManager;

import javax.swing.WindowConstants;

import javax.swing.undo.UndoManager;

import lwz2.FontSlectDemo;

import https://www.360docs.net/doc/2c1441555.html,youts.Bilateral; import https://www.360docs.net/doc/2c1441555.html,youts.Constraints; import https://www.360docs.net/doc/2c1441555.html,youts.GroupLayout;

//VS4E -- DO NOT REMOVE THIS LINE!

public class 记事本 extends JFrame {

private static final long serialVersionUID = 1L;

private JMenuItem jMenuItem0;

private JMenuItem jMenuItem1;

private JMenuItem jMenuItem2;

private JMenuItem jMenuItem3;

private JMenuItem jMenuItem4;

private JMenu jMenu0;

private JMenuItem jMenuItem5;

private JMenuItem jMenuItem6;

private JMenuItem jMenuItem7;

private JMenuItem jMenuItem8;

private JMenuItem jMenuItem9;

private JMenuItem jMenuItem10;

private JMenuItem jMenuItem11;

private JMenu jMenu1;

private JMenuItem jMenuItem12;

private JMenuItem jMenuItem13;

private JMenu jMenu2;

private JMenuItem jMenuItem14;

private JMenu jMenu3;

private JMenuBar jMenuBar0;

private JTextArea jTextArea0;

private JScrollPane jScrollPane0;

private static final String PREFERRED_LOOK_AND_FEEL = "javax.swing.plaf.metal.MetalLookAndFeel";

private static boolean flag = false; // 判断是否保存

JTextField findtxt,findtxt1,repltxt; //find为查找对话框的输入文本区，replace对话框的输入文本区

Dialog find,replace,typeface; //find为查找对话框，replace对话框

String str,strnext,fname=null,path;

int startp,endp,nexttemp,newstartp,newendp;

private JPopupMenu text=new JPopupMenu();

JButton replb=new JButton();

JFrame frame=new JFrame();

UndoManager um = new UndoManager();

File newfiles;

JFileChooser choose = new JFileChooser(); //文件对话框

public 记事本() {

initComponents();

text.add(jMenuItem5);

text.add(jMenuItem6);

text.add(jMenuItem7);

text.add(jMenuItem8);

text.add(jMenuItem9);

jTextArea0.add(text);

//注册监听

jTextArea0.getDocument().addUndoableEditListener(um);

NewListener n = new NewListener();

jMenuItem0.addActionListener(n);

ImageIcon newfile = new ImageIcon("C:/Documents and Settings/user/桌面/Myjava4/images/snew.gif");//添加按钮图标

jMenuItem0.setIcon(newfile);

KeyStroke

keynew=KeyStroke.getKeyStroke(KeyEvent.VK_N,Event.CTRL_MASK); //定义快捷键 jMenuItem0.setAccelerator(keynew);

OpenListener o=new OpenListener();

jMenuItem1.addActionListener(o);

ImageIcon openfile = new ImageIcon("C:/Documents and Settings/user/

桌面/Myjava4/images/sopen.GIF");

jMenuItem1.setIcon(openfile);

KeyStroke

keyopen=KeyStroke.getKeyStroke(KeyEvent.VK_O,Event.CTRL_MASK); //定义快捷键 jMenuItem1.setAccelerator(keyopen);

SaveListener s = new SaveListener();

jMenuItem2.addActionListener(s);

ImageIcon savea = new ImageIcon("C:/Documents and Settings/user/桌面/Myjava4/images/ssave.gif");

jMenuItem2.setIcon(savea);

KeyStroke

keysave=KeyStroke.getKeyStroke(KeyEvent.VK_S,Event.CTRL_MASK); //定义快捷键 jMenuItem2.setAccelerator(keysave);

SaveToListener s1 = new SaveToListener();

jMenuItem3.addActionListener(s1);

ImageIcon saveb = new ImageIcon("C:/Documents and Settings/user/桌面/Myjava4/images/ssave.gif");

jMenuItem3.setIcon(saveb);

KeyStroke

keysave1=KeyStroke.getKeyStroke(KeyEvent.VK_A,Event.CTRL_MASK); //定义快捷键 jMenuItem3.setAccelerator(keysave1);

ExitListener e = new ExitListener();

jMenuItem4.addActionListener(e);

ImageIcon exit = new ImageIcon("C:/Documents and Settings/user/桌面/Myjava4/images/sexit.gif");

jMenuItem4.setIcon(exit);

KeyStroke

keyexit=KeyStroke.getKeyStroke(KeyEvent.VK_X,Event.CTRL_MASK); //定义快捷键 jMenuItem4.setAccelerator(keyexit);

RevokeListener r=new RevokeListener();

jMenuItem5.addActionListener(r);

KeyStroke

keyrevoke=KeyStroke.getKeyStroke(KeyEvent.VK_Z,Event.CTRL_MASK); //定义快捷键

jMenuItem5.setAccelerator(keyrevoke);

CutListener c = new CutListener();

jMenuItem6.addActionListener(c);

ImageIcon cut = new ImageIcon("C:/Documents and Settings/user/桌面/Myjava4/images/scut.gif");

jMenuItem6.setIcon(cut);

KeyStroke

keycut=KeyStroke.getKeyStroke(KeyEvent.VK_X,Event.CTRL_MASK);

jMenuItem6.setAccelerator(keycut);

CopyListener c1 = new CopyListener();

jMenuItem7.addActionListener(c1);

ImageIcon copy = new ImageIcon("images/scopy.gif");

jMenuItem7.setIcon(copy);

KeyStroke

keycopy=KeyStroke.getKeyStroke(KeyEvent.VK_C,Event.CTRL_MASK);

jMenuItem7.setAccelerator(keycopy);

PasteListener p = new PasteListener();

jMenuItem8.addActionListener(p);

ImageIcon paste = new ImageIcon("C:/Documents and Settings/user/桌面/Myjava4/images/spaste.gif");

jMenuItem8.setIcon(paste);

KeyStroke

keypaste=KeyStroke.getKeyStroke(KeyEvent.VK_V,Event.CTRL_MASK);

jMenuItem8.setAccelerator(keypaste);

SelectAllListener s2=new SelectAllListener();

jMenuItem9.addActionListener(s2);

KeyStroke

keyselectall=KeyStroke.getKeyStroke(KeyEvent.VK_A,Event.CTRL_MASK);

jMenuItem9.setAccelerator(keyselectall);

ReplacementListener r1=new ReplacementListener();

jMenuItem10.addActionListener(r1);

KeyStroke

keyreplace=KeyStroke.getKeyStroke(KeyEvent.VK_H,Event.CTRL_MASK);

jMenuItem10.setAccelerator(keyreplace);

SearchListener s3=new SearchListener();

jMenuItem11.addActionListener(s3);

KeyStroke

keysearch=KeyStroke.getKeyStroke(KeyEvent.VK_F,Event.CTRL_MASK);

jMenuItem11.setAccelerator(keysearch);

WrapListener w=new WrapListener();

jMenuItem12.addActionListener(w);

TypefaceListener t=new TypefaceListener();

jMenuItem13.addActionListener(t);

AboutListener a=new AboutListener();

jMenuItem14.addActionListener(a);

ImageIcon about = new ImageIcon("C:/Documents and Settings/user/桌面/Myjava4/images/sabout.gif");

jMenuItem14.setIcon(about);

jTextArea0.addMouseListener(new handlemouse(this));//注册鼠标右击事件

jTextArea0.setFont(new Font("宋体",Font.PLAIN,30));

}

//处理右键弹出菜单类

class handlemouse extends MouseAdapter

{

记事本 note;

handlemouse(记事本 note1)

{note=note1;}

public void mouseReleased(MouseEvent n)

{

if(n.isPopupTrigger())

note.text.show((Component)n.getSource(),n.getX(),n.getY());

}

}

//撤销

private class RevokeListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

jMenuItem4.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z, ActionEvent.CTRL_MASK ));

if (um.canUndo()) {

um.undo();

}

}

}

//字体

private class TypefaceListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

// new 字体();

JColorChooser jColor=new JColorChooser(); //调用颜色面板，设置前景就可更改字体颜色

Color fcolor=jTextArea0.getForeground();

jTextArea0.setForeground( jColor.showDialog(jTextArea0,"选择字体颜色",fcolor));

}

}

//换行

private class WrapListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

jTextArea0.setLineWrap(true);//激活自动换行功能

jTextArea0.setWrapStyleWord(true);//激活断行不断字功能

jMenuItem12.setEnabled(false);

}}

//查找

class SearchListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

// 创建查找对话框;

find=new Dialog(frame, "查找");

JPanel p1=new JPanel();

JPanel p2=new JPanel();

findtxt1=new JTextField(7);

JButton findenter=new JButton("查找");

JButton find1=new JButton("查找下一个");

JButton Quxiao=new JButton("取消");

p1.add(new JLabel("输入要查找字符:"));

p1.add(findtxt1);

p2.add(findenter);

p2.add(find1);

p2.add(Quxiao);

FindListener f=new FindListener();

findenter.addActionListener(f);

FindNextListener f1=new FindNextListener();

find1.addActionListener(f1);

// KeyStroke keyfind=KeyStroke.getKeyStroke(KeyEvent.VK_F3,0);

// find1.setAccelerator(keyfind);

QuxiaoListener q=new QuxiaoListener();

Quxiao.addActionListener(q);

find.add("Center",p1);

find.add("South",p2);

find.setSize(300,200);

find.show();

}

}

//查找下一个

private class FindNextListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

if(findtxt1.getText().equals(""))

{ JOptionPane.showMessageDialog(jMenu0, "请输入要查找的内容");}

else if(!findtxt1.getText().equals(""))

{

nexttemp=newendp; /////获取上次查找的终点做为未查找字符串的起点

String strall=jTextArea0.getText();

jTextArea0.select(nexttemp,strall.length()); /////选中所有未查找的字符串

strnext=jTextArea0.getSelectedText();

newstartp=strnext.indexOf(findtxt1.getText())+nexttemp;/////在未查找的字符串里搜索对应字符的在TXT1中的位置

newendp=newstartp+findtxt1.getText().length();

jTextArea0.select(newstartp,newendp); ////找到相应文本，并选择

notfindmethod1();

}}

}

//取消

private class QuxiaoListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

find.dispose();

}}

//查找

private class FindListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

if(findtxt1.getText().equals(""))

{ JOptionPane.showMessageDialog(jMenu0, "请输入要查找的内容");}

else if(!findtxt1.getText().equals(""))

{

// JOptionPane.showMessageDialog(jMenu1, "正在查找");

str=jTextArea0.getText();

startp=str.indexOf(findtxt1.getText());

endp=startp+findtxt1.getText().length();

jTextArea0.select(startp,endp);

newendp=endp;////////获取这次查找的终点

notfindmethod1();

}

}}

//替换

class ReplacementListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

replace=new Dialog(frame, "替换"); // 创建替换对话框;

JButton replb=new JButton("替换");

JButton tihuan=new JButton("替换下一个");

JButton quxiao1=new JButton("取消");

JPanel p1=new JPanel();

JPanel p2=new JPanel();

JPanel p3=new JPanel();

findtxt=new JTextField(7);

repltxt=new JTextField(7);

p1.add(new JLabel("输入原始字符:"));

p1.add(findtxt);

p2.add(new JLabel("输入替换字符:"));

p2.add(repltxt);

p3.add(replb);

p3.add(tihuan);

p3.add(quxiao1);

ReplaceListener r=new ReplaceListener();

replb.addActionListener(r);

TiHuanListener t=new TiHuanListener();

tihuan.addActionListener(t);

Quxiao1Listener q1=new Quxiao1Listener();

quxiao1.addActionListener(q1);

replace.add("North",p1);

replace.add("Center",p2);

replace.add("South",p3);

replace.setSize(300,200);

replace.show();

}}

//替换

private class ReplaceListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

//replace.dispose();

if(findtxt.getText().equals("")||repltxt.getText().equals(""))

{ JOptionPane.showMessageDialog(jMenu0, "请输入要查找或替换的内容");}

else

if(!findtxt.getText().equals("")&&!repltxt.getText().equals(""))

{

str=jTextArea0.getText();

startp=str.indexOf(findtxt.getText());

endp=startp+findtxt.getText().length();

jTextArea0.replaceRange(repltxt.getText(),startp,endp);

newendp=endp; //获取这次替换的终点

}}

}

//替换下一个

private class TiHuanListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

nexttemp=newendp; /////获取上次查找的终点做为未查找字符串的起点

String strall=jTextArea0.getText();

jTextArea0.select(nexttemp,strall.length()); /////选中所有未查找的字符串

strnext=jTextArea0.getSelectedText();

newstartp=strnext.indexOf(findtxt.getText())+nexttemp;/////在未查找的字符串里搜索对应字符的在jTextArea0中的位置

newendp=newstartp+findtxt.getText().length();

jTextArea0.select(newstartp,newendp);

if(!jTextArea0.getSelectedText().equals(findtxt.getText()))

{

jTextArea0.setCaretPosition(0); //光标返回文件头部

JOptionPane.showMessageDialog(null,"查找不到对应的字符！","查找错误",JOptionPane.ERROR_MESSAGE);

}

else{

jTextArea0.replaceRange(repltxt.getText(),newstartp,newendp);//替换字符

}

}

}

//取消

private class Quxiao1Listener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

replace.dispose();

}}

//全选

private class SelectAllListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

jTextArea0.selectAll();

}}

//新建

private class NewListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

jTextArea0.setText("");

}}

//打开

private class OpenListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

jTextArea0.setText("");

JFileChooser fileChooser = new JFileChooser();

int r = fileChooser.showOpenDialog(frame);

if (r == JFileChooser.APPROVE_OPTION) {

try {

File file = fileChooser.getSelectedFile();

FileReader fr = new FileReader(file);

char[] buf = new char[1024];

int len = 0;

while ((len = fr.read(buf)) != -1) {

jTextArea0.append(new String(buf, 0, len));

}

fr.close();

} catch (IOException e1) {

e1.printStackTrace();

}

}

}}

//保存

private class SaveListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

if(fname==null) //如果文件名为空，说明文件未被创建，弹出另存为对

话框

{ othersave(); }

try {

File savefile=new File(path);

savefile.createNewFile();

FileWriter fw=new FileWriter(savefile);

fw.write(jTextArea0.getText());

fw.close();

}

catch(IOException e1)

{}

}}

//另存为

private class SaveToListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

othersave();

}}

//另存为方法

public void othersave()

{

if(choose.APPROVE_OPTION==choose.showSaveDialog(frame))

{

path=choose.getSelectedFile().getPath();

newfiles=new File(path);

//state.setText("JAVA记事本------"+path);

fname=choose.getSelectedFile().getName();;

try {

newfiles=new File(path);

newfiles.createNewFile();

FileWriter fw=new FileWriter(newfiles);

fw.write(jTextArea0.getText());

fw.close();

}catch(IOException e)

{}

}

}

//退出

private class ExitListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

StringBuffer sb = new StringBuffer();

try {

FileReader fr = new FileReader("未命名文件.txt");

char[] buf = new char[1024];

int len = 0;

while ((len = fr.read(buf)) != -1) {

sb.append(new String(buf, 0, len));

}

fr.close();

} catch (Exception e1) {

e1.getStackTrace();

}

String s = sb.toString();

if (flag == false || !(jTextArea0.getText().equals(s))) {

int r = JOptionPane.showConfirmDialog(frame, "你还没有保存，要保存吗？");

if (r == JOptionPane.OK_OPTION) {

JFileChooser filechoose = new JFileChooser();

int r1 = filechoose.showSaveDialog(frame);

if (r1 == JFileChooser.APPROVE_OPTION) {

File file = filechoose.getSelectedFile();

try {

FileWriter writer = new FileWriter(file);

writer.write((String) jTextArea0.getText());

writer.close();

System.exit(0);

} catch (IOException e1) {

e1.printStackTrace();

}

} else {

}

} else if (r == JOptionPane.NO_OPTION) {

System.exit(0);

} else {

}

} else

System.exit(0);

}

}

//剪切

private class CutListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

jTextArea0.cut();

}}

//复制

private class CopyListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

jTextArea0.copy();

}}

//粘贴

private class PasteListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

jTextArea0.paste();

}}

//帮助

private class AboutListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

JOptionPane.showMessageDialog(jMenu0, "李红力制作");

}}

//查找中查找不到的方法notfindmethod1

public void notfindmethod1()

{

if(!jTextArea0.getSelectedText().equals(findtxt1.getText()))

{ jTextArea0.setCaretPosition(0); //光标返回文件头部

JOptionPane.showMessageDialog(null,"查找不到对应的字符！","查找错误",JOptionPane.ERROR_MESSAGE);

}

}

private void initComponents() {

setLayout(new GroupLayout());

add(getJScrollPane0(), new Constraints(new Bilateral(-1, 0, 22), new Bilateral(-1, 0, 22)));

setJMenuBar(getJMenuBar0());

setSize(297, 237);

}

private JScrollPane getJScrollPane0() {

if (jScrollPane0 == null) {

jScrollPane0 = new JScrollPane();

jScrollPane0.setViewportView(getJTextArea0());

}

return jScrollPane0;

}

private JTextArea getJTextArea0() { if (jTextArea0 == null) {

jTextArea0 = new JTextArea();

}

return jTextArea0;

}

private JMenuBar getJMenuBar0() {

if (jMenuBar0 == null) {

jMenuBar0 = new JMenuBar();

jMenuBar0.add(getJMenu0());

jMenuBar0.add(getJMenu1());

jMenuBar0.add(getJMenu2());

jMenuBar0.add(getJMenu3());

}

return jMenuBar0;

}

private JMenu getJMenu3() {

if (jMenu3 == null) {

jMenu3 = new JMenu();

jMenu3.setText("帮助");

jMenu3.add(getJMenuItem14());

}

return jMenu3;

}

private JMenuItem getJMenuItem14() { if (jMenuItem14 == null) {

jMenuItem14 = new JMenuItem();

jMenuItem14.setText("关于制作");

}

return jMenuItem14;

}

private JMenu getJMenu2() {

if (jMenu2 == null) {

jMenu2 = new JMenu();

jMenu2.setText("格式");

jMenu2.add(getJMenuItem12());

}

return jMenu2;

}

private JMenuItem getJMenuItem13() { if (jMenuItem13 == null) {

jMenuItem13 = new JMenuItem();

jMenuItem13.setText("字体颜色");

}

return jMenuItem13;

}

private JMenuItem getJMenuItem12() { if (jMenuItem12 == null) {

jMenuItem12 = new JMenuItem();

jMenuItem12.setText("换行");

}

return jMenuItem12;

}

private JMenu getJMenu1() {

if (jMenu1 == null) {

jMenu1 = new JMenu();

jMenu1.setText("编辑");

jMenu1.add(getJMenuItem5());

jMenu1.add(getJMenuItem6());

jMenu1.add(getJMenuItem7());

jMenu1.add(getJMenuItem8());

jMenu1.add(getJMenuItem9());

jMenu1.add(getJMenuItem10());

jMenu1.add(getJMenuItem11());

}

return jMenu1;

}

private JMenuItem getJMenuItem11() { if (jMenuItem11 == null) {

jMenuItem11 = new JMenuItem();

jMenuItem11.setText("查找");

}

return jMenuItem11;

}

if (jMenuItem10 == null) {

jMenuItem10 = new JMenuItem();

jMenuItem10.setText("替换");

}

return jMenuItem10;

}

private JMenuItem getJMenuItem9() { if (jMenuItem9 == null) {

jMenuItem9 = new JMenuItem();

jMenuItem9.setText("全选");

}

return jMenuItem9;

}

private JMenuItem getJMenuItem8() { if (jMenuItem8 == null) {

jMenuItem8 = new JMenuItem();

jMenuItem8.setText("粘贴");

}

return jMenuItem8;

}

private JMenuItem getJMenuItem7() { if (jMenuItem7 == null) {

jMenuItem7 = new JMenuItem();

jMenuItem7.setText("复制");

}

return jMenuItem7;

}

private JMenuItem getJMenuItem6() { if (jMenuItem6 == null) {

jMenuItem6 = new JMenuItem();

jMenuItem6.setText("剪切 ");

}

return jMenuItem6;

}

private JMenuItem getJMenuItem5() { if (jMenuItem5 == null) {

jMenuItem5 = new JMenuItem();

jMenuItem5.setText("撤销");

}

return jMenuItem5;

}

private JMenu getJMenu0() {

if (jMenu0 == null) {

jMenu0 = new JMenu();

jMenu0.setText("文件");

jMenu0.add(getJMenuItem0());

jMenu0.add(getJMenuItem1());

jMenu0.add(getJMenuItem2());

jMenu0.add(getJMenuItem3());

jMenu0.add(getJMenuItem4());

}

return jMenu0;

}

private JMenuItem getJMenuItem4() { if (jMenuItem4 == null) {

jMenuItem4 = new JMenuItem();

jMenuItem4.setText("退出");

}

return jMenuItem4;

}

private JMenuItem getJMenuItem3() { if (jMenuItem3 == null) {

jMenuItem3 = new JMenuItem();

jMenuItem3.setText("另存为");

}

return jMenuItem3;

}

private JMenuItem getJMenuItem2() { if (jMenuItem2 == null) {

jMenuItem2 = new JMenuItem();

jMenuItem2.setText("保存");

}

return jMenuItem2;

}

private JMenuItem getJMenuItem1() { if (jMenuItem1 == null) {

jMenuItem1 = new JMenuItem();

jMenuItem1.setText("打开");

}

return jMenuItem1;

}

private JMenuItem getJMenuItem0() {

if (jMenuItem0 == null) {

jMenuItem0 = new JMenuItem();

jMenuItem0.setText("新建");

}

return jMenuItem0;

}

private static void installLnF() {

try {

String lnfClassname = PREFERRED_LOOK_AND_FEEL;

if (lnfClassname == null)

lnfClassname = UIManager.getCrossPlatformLookAndFeelClassName();

UIManager.setLookAndFeel(lnfClassname);

} catch (Exception e) {

System.err.println("Cannot install " + PREFERRED_LOOK_AND_FEEL

+ " on this platform:" + e.getMessage());

}

}

/**

* Main entry of the class.

* Note: This class is only created so that you can easily preview the result at runtime.

* It is not expected to be managed by the designer.

* You can modify it as you like.

*/

public static void main(String[] args) {

installLnF();

SwingUtilities.invokeLater(new Runnable() {

public void run() {

记事本 frame = new 记事本();

frame.setDefaultCloseOperation(记事本.EXIT_ON_CLOSE);

frame.setTitle("新建_记事本");

frame.getContentPane().setPreferredSize(frame.getSize());

frame.pack();

frame.setSize(500, 600);

frame.setLocationRelativeTo(null);

frame.setVisible(true);

}

});

}

}

文件里的功能