给你个做好了的Java的源程序的记事本，自己看看就行了的，不怎么难的···
专注于为中小企业提供做网站、成都网站制作服务,电脑端+手机端+微信端的三站合一,更高效的管理,为中小企业新平免费做网站提供优质的服务。我们立足成都，凝聚了一批互联网行业人才，有力地推动了上千多家企业的稳健成长，帮助中小企业通过网站建设实现规模扩充和转变。
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
public class MyNotepad implements ActionListener{
private JFrame frame=new JFrame("新记事本");
private JTextArea jta=new JTextArea();
private String result="";
private boolean flag=true;
private File f;
private JButton jb=new JButton("开始");
private JTextField jtf=new JTextField(15);
private JTextField jt=new JTextField(15);
private JButton jbt=new JButton("替换为");
private JButton jba=new JButton("全部替换");
private Icon ic=new ImageIcon("D:\\java课堂笔记\\GUI\\11.gif");
private String value;
private int start=0;
private JFrame jf=new JFrame("查找");
private JFrame jfc=new JFrame("替换");
@Override
public void actionPerformed(ActionEvent e) {
String comm=e.getActionCommand();
if("新建".equals(comm)){
if(!(frame.getTitle().equals("新记事本"))){
if(!flag){
write();
newNew();
}else{
JFileChooser jfc=new JFileChooser("D:\\java课堂笔记");
int returnVal = jfc.showDialog(null,"保存为");
if(returnVal == JFileChooser.APPROVE_OPTION) {//选择文件后再执行下面的语句，保证了程序的健壮性
f=jfc.getSelectedFile();
flag=false;
write();
}
}
}else if(!(jta.getText().isEmpty())){
JFileChooser jfc=new JFileChooser("D:\\java课堂笔记");
int returnVal = jfc.showDialog(null,"保存为");
if(returnVal == JFileChooser.APPROVE_OPTION) {//选择文件后再执行下面的语句，保证了程序的健壮性
f=jfc.getSelectedFile();
flag=false;
write();
newNew();
}
}else{
newNew();
}
}else if("打开".equals(comm)){
JFileChooser jfc=new JFileChooser("D:\\java课堂笔记");
jfc.setDialogType(JFileChooser.OPEN_DIALOG);
int returnVal = jfc.showOpenDialog(null);
if(returnVal == JFileChooser.APPROVE_OPTION) {//选择文件后再执行下面的语句，保证了程序的健壮性
f=jfc.getSelectedFile();
frame.setTitle(f.getName());
result=read();
flag=false;
value=result;
jta.setText(result);
}
}else if("保存".equals(comm)){
JFileChooser jfc=new JFileChooser("D:\\java课堂笔记");
if(flag){
int returnVal = jfc.showDialog(null,"保存为");
if(returnVal == JFileChooser.APPROVE_OPTION) {//选择文件后再执行下面的语句，保证了程序的健壮性
f=jfc.getSelectedFile();
flag=false;
write();
}
}else{
write();
}
}else if("另存".equals(comm)){
JFileChooser jfc=new JFileChooser("D:\\java课堂笔记");
int returnVal = jfc.showDialog(null,"另存");
if(returnVal == JFileChooser.APPROVE_OPTION) {//选择文件后再执行下面的语句，保证了程序的健壮性
f=jfc.getSelectedFile();
write();
}
}else if("退出".equals(comm)){
System.exit(0);
}else if("撤销".equals(comm)){
jta.setText(value);
}else if("剪切".equals(comm)){
value=jta.getText();
jta.cut();
}else if("复制".equals(comm)){
jta.copy();
}else if("粘贴".equals(comm)){
value=jta.getText();
jta.paste();
}else if("删除".equals(comm)){
value=jta.getText();
jta.replaceSelection(null);
}else if("全选".equals(comm)){
jta.selectAll();
}else if("查找".equals(comm)){
value=jta.getText();
jf.add(jtf,BorderLayout.CENTER);
jf.add(jb,BorderLayout.SOUTH);
jf.setLocation(300,300);
jf.pack();
jf.setVisible(true);
jf.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
}else if("替换".equals(comm)){
value=jta.getText();
GridLayout gl=new GridLayout(3,3);
JLabel jl1=new JLabel("查找内容:");
JLabel jl2=new JLabel("替换为:");
jfc.setLayout(gl);
jfc.add(jl1);
jfc.add(jtf);
jfc.add(jb);
jfc.add(jl2);
jfc.add(jt);
jfc.add(jbt);
JLabel jl3=new JLabel();
JLabel jl4=new JLabel();
jfc.add(jl3);
jfc.add(jl4);
jfc.add(jba);
jfc.setLocation(300,300);
jfc.pack();
jfc.setVisible(true);
jfc.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
}else if("版本".equals(comm)){
JDialog jd=new JDialog(frame,"关于对话框");
jd.setSize(200,200);
JLabel l=new JLabel("哈哈哈哈哈哈哈哈哈哈呵呵呵呵呵呵呵呵呵呵呵呵呵");
jd.add(l,BorderLayout.CENTER);
jd.setLocation(100,200);
jd.setSize(300,300);
jd.setVisible(true);
// jd.pack();
jd.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
}else if("开始".equals(comm)||"下一个".equals(comm)){
String temp=jtf.getText();
int s=value.indexOf(temp,start);
if(value.indexOf(temp,start)!=-1){
jta.setSelectionStart(s);
jta.setSelectionEnd(s+temp.length());
jta.setSelectedTextColor(Color.GREEN);
start=s+1;
jb.setText("下一个");
// value=value.substring(s+temp.length());//不能截取字串
}else {
JOptionPane.showMessageDialog(jf, "查找完毕!", "提示", 0, ic);
jf.dispose();
}
}else if("替换为".equals(comm)){
String temp=jtf.getText();
int s=value.indexOf(temp,start);
if(value.indexOf(temp,start)!=-1){
jta.setSelectionStart(s);
jta.setSelectionEnd(s+temp.length());
jta.setSelectedTextColor(Color.GREEN);
start=s+1;
jta.replaceSelection(jt.getText());
}else {
JOptionPane.showMessageDialog(jf, "查找完毕!", "提示", 0, ic);
jf.dispose();
}
}else if("全部替换".equals(comm)){
String temp=jta.getText();
temp=temp.replaceAll(jtf.getText(), jt.getText());
jta.setText(temp);
}
}
public String read(){
String temp="";
try {
FileInputStream fis = new FileInputStream(f.getAbsolutePath());
byte[] b=new byte[1024];
while(true){
int num=fis.read(b);
if(num==-1)break;
temp=temp+new String(b,0,num);
}
fis.close();
} catch (Exception e1) {
e1.printStackTrace();
}
return temp;
}
public void write(){
try {
FileOutputStream fos=new FileOutputStream(f);
fos.write(jta.getText().getBytes());
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public void newNew(){
frame.dispose();
new MyNotepad();
flag=true;
}
public MyNotepad(){
JMenuBar jmb=new JMenuBar();
String[] menuLab={"文件","编辑","帮助"};
String[][] menuItemLab={{"新建","打开","保存","另存","退出"},
{"撤销","剪切","复制","粘贴","删除","全选","查找","替换"},
{"版本"}};
for(int i=0;imenuLab.length;i++){
JMenu menu=new JMenu(menuLab[i]);
jmb.add(menu);
for(int j=0;jmenuItemLab[i].length;j++){
JMenuItem jmi=new JMenuItem(menuItemLab[i][j]);
menu.add(jmi);
jmi.addActionListener(this);
}
}
frame.setJMenuBar(jmb);
jta.setLineWrap(true);//自动换行
JScrollPane jsp=new JScrollPane(jta);//滚动窗口面板
frame.add(jsp);
jb.addActionListener(this);
jbt.addActionListener(this);
jba.addActionListener(this);
frame.setLocation(200,50);
frame.setSize(620,660);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new MyNotepad();
}
}
import java.awt.*;
import java.awt.event.*;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.OutputStream;
import javax.swing.JFrame;
import wyq.study.io.FileLister;
public class MenuDemo extends Frame implements ActionListener
{
TextArea tf = new TextArea();
MenuBar bar = new MenuBar();
Menu menu = new Menu("文件");
MenuItem newf = new MenuItem("新建");
MenuItem open = new MenuItem("打开");
MenuItem saveFile = new MenuItem("保存");
MenuItem saveFileAs = new MenuItem("另存为");
MenuItem close = new MenuItem("关闭");
MenuItem quit = new MenuItem("退出");
public MenuDemo()
{
super("MenuDemo");
setMenuBar(bar);
menu.add(newf);
menu.add(open);
menu.add(close);
menu.add(saveFile);
menu.add(saveFileAs);
menu.addSeparator();
menu.add(quit);
bar.add(menu);
newf.addActionListener(this);
open.addActionListener(this);
close.addActionListener(this);
quit.addActionListener(this);
saveFile.addActionListener(this);
saveFileAs.addActionListener(this);
//addWindowListener(new WinLis());
//关闭窗口
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
dispose();
}
});
add(tf);
}
public void actionPerformed(ActionEvent e)
{
if (e.getSource() == newf)
{
tf.setText("新建");
}
if (e.getSource() == open)
{
tf.setText("打开");
}
if (e.getSource() == close)
{
tf.setText("关闭");
}
if (e.getSource() ==saveFile)
{
tf.setText("保存");
saveFile();
}
if (e.getSource() == saveFileAs)
{
tf.setText("另存为");
saveFileAs();
}
if (e.getSource() == quit)
{
System.exit(0);
}
}
public void saveFile()
{
String directory = System.getProperty("user.dir");
FileDialog f = new FileDialog(this, "Save File", FileDialog.SAVE);
f.setDirectory(directory);
f.show();
String fileName =f.getFile(); // 得到保存的文件名
directory=f.getDirectory();//得到文件路径
//System.out.println(directory+" "+file);
String txt=tf.getText();
File file=new File(directory+fileName);
OutputStream out=null;
try
{
out=new FileOutputStream(file);
}
catch (FileNotFoundException e)
{
}
try
{
out.write(txt.getBytes());
}
catch (IOException e)
{
e.printStackTrace();
}
try
{
if(out!=null)
out.close();
}
catch (IOException e)
{
e.printStackTrace();
}
}
public void saveFileAs()
{
saveFile();
}
class WinLis extends WindowAdapter
{
public void windowCosing(WindowEvent e)
{
System.exit(0);
}
}
public static void main(String[] args)
{
Frame f = new MenuDemo();
f.setSize(400, 200);
f.setVisible(true);
}
}
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
class TextEditorFrame extends JFrame{
File file=null;
Color color=Color.red;
TextEditorFrame(){
initTextPane();
initAboutDialog();
initToolBar();
initMenu();
}
void initTextPane(){
getContentPane().add(new JScrollPane(text));
}
JTextPane text=new JTextPane(); //这是用来做文本框的
JFileChooser filechooser=new JFileChooser(); //文件选择框
JColorChooser colorchooser=new JColorChooser();//
JDialog about=new JDialog(this); //关于对话框
JMenuBar menubar=new JMenuBar();//菜单
JMenu[] menus=new JMenu[]{
new JMenu("文件"),
new JMenu("编辑"),
new JMenu("帮助")
};
JMenuItem menuitems[][]=new JMenuItem[][]{{
new JMenuItem("新建"),
new JMenuItem("打开"),
new JMenuItem("保存"),
new JMenuItem("退出")
},
{
new JMenuItem("复制"),
new JMenuItem("剪切"),
new JMenuItem("粘贴"),
new JMenuItem("颜色")
},
{
new JMenuItem("关于")
}
};
void initMenu(){
for(int i=0;imenus.length;i++){
menubar.add(menus[i]);
for(int j=0;jmenuitems[i].length;j++){
menus[i].add(menuitems[i][j]);
menuitems[i][j].addActionListener( action );
}
}
this.setJMenuBar(menubar);
}
ActionListener action=new ActionListener(){ //when here have not wrong:
public void actionPerformed(ActionEvent e){
JMenuItem mi=(JMenuItem)e.getSource();
String id=mi.getText();
if(id.equals("新建")){
text.setText("");
file=null;
}else if(id.equals("打开")){
if(file !=null)filechooser.setSelectedFile(file);
int returnVal=filechooser.showOpenDialog(TextEditorFrame.this);
if(returnVal==JFileChooser.APPROVE_OPTION){
file=filechooser.getSelectedFile();
openFile();
}
}else if(id.equals("保存")){
if(file!=null) filechooser.setSelectedFile(file);
int returnVal=filechooser.showSaveDialog(TextEditorFrame.this);
if(returnVal==JFileChooser.APPROVE_OPTION){
file=filechooser.getSelectedFile();
saveFile();
}
}else if(id.equals("退出")){
TextEditorFrame f=new TextEditorFrame();
int s=JOptionPane.showConfirmDialog(f,"你真的要结束吗","结束程序",JOptionPane.YES_NO_CANCEL_OPTION);
if(s==JOptionPane.YES_OPTION)
System.exit(0);
}else if(id.equals("剪切")){
text.cut();
}else if(id.equals("复制")){
text.copy();
}else if(id.equals("粘贴")){
text.paste();
}else if(id.equals("color")){
color=JColorChooser.showDialog(TextEditorFrame.this,"",color);
text.setForeground(color);
}else if(id.equals("关于")){
about.setSize(200,150);
about.show();
}
}
};
void saveFile(){
try{
FileWriter fw=new FileWriter(file);
fw.write(text.getText());
fw.close();
}
catch(Exception e){e.printStackTrace();}
}
void openFile(){
try{
FileReader fr=new FileReader(file);
int len=(int)file.length();
char []buffer=new char[len];
fr.read(buffer,0,len);
fr.close();
text.setText(new String(buffer));
}catch(Exception e){e.printStackTrace();}
}
void initAboutDialog(){
about.getContentPane().add(new JLabel("作者－覃树新:记事本Q1.0版本"));
about.setModal(true);
about.setSize(200,100);
}
JToolBar toolbar=new JToolBar();//我来加上工具条
JButton [] buttons=new JButton[]{
new JButton("", new ImageIcon("qin.jpg")),
new JButton("", new ImageIcon("shu.jpg")),
new JButton("", new ImageIcon("xin.jpg"))
};
void initToolBar(){
for(int i=0;ibuttons.length;i++)
toolbar.add(buttons[i]);
buttons[0].setToolTipText("复制");
buttons[0].addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.copy();
}
});
buttons[1].setToolTipText("剪切");
buttons[1].addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.cut();
}
});
buttons[2].setToolTipText("粘贴");
buttons[2].addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.paste();
}
});
this.getContentPane().add(toolbar,BorderLayout.NORTH);
}
}
public class F{
public static void main(String args[]){
TextEditorFrame f=new TextEditorFrame();
f.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e)
{
TextEditorFrame f=new TextEditorFrame();
int s=JOptionPane.showConfirmDialog(f,"你真的要结束吗","结束程序",JOptionPane.YES_NO_OPTION);
if(s==JOptionPane.YES_OPTION)
System.exit(0);}
});
f.setTitle("简单的记事本");
f.setSize(800,600);
f.show();
}
}