用JAVA编个简单的记事本程序

一、用JAVA编个简单的记事本程序

class Editor extends Frame implements ActionListener,ItemListener

int n1;String str="";int k=0;String st1,st2;

JTextArea ta=new JTextArea(50,50);

Button btn1,btn2,btn3;Panel p1=new Panel();

Panel p2=new Panel();Panel p3=new Panel();Panel p4=new Panel();

ImageIcon YouImg= new ImageIcon("iconimage.jpg");

setIconImage(YouImg.getImage());

addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

Menu file=new Menu("文件(F)");Menu edit=new Menu("编辑(E)");Menu help=new Menu("帮助(H)");

Menu pattern=new Menu("格式(P)");Menu time=new Menu("时间(T)");

MenuItem exit=new MenuItem("退出",new MenuShortcut(KeyEvent.VK_Q));

MenuItem tdate=new MenuItem("日期/时间",new MenuShortcut(KeyEvent.VK_D));

MenuItem renew=new MenuItem("新建", new MenuShortcut(KeyEvent.VK_N));

MenuItem save=new MenuItem("保存", new MenuShortcut(KeyEvent.VK_S));

MenuItem open=new MenuItem("打开",new MenuShortcut(KeyEvent.VK_O));

MenuItem copy=new MenuItem("复制",new MenuShortcut(KeyEvent.VK_C));

MenuItem paste=new MenuItem("粘贴",new MenuShortcut(KeyEvent.VK_V));

MenuItem cut=new MenuItem("剪切",new MenuShortcut(KeyEvent.VK_X));

MenuItem helptopic=new MenuItem("主题",new MenuShortcut(KeyEvent.VK_T));

helptopic.addActionListener(this);

dialog=new Dialog(this,"字体设置");dialog.setSize(300,300);

dialog1=new Dialog(this,"帮助主题");dialog1.setBounds(250,100,300,400);

dialog.addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

dialog1.addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

//dialog.setBackground(Color.WHITE);

dialog.setLayout(null);dialog.setBounds(170,150,450,300);

Label L1=new Label("字体(F)");Label L2=new Label("字形(Y)");

Label L3=new Label("大小(S)");TextArea ta1=new TextArea(5,5);

ta1=new TextArea("至于记事本的主题嘛，因为本人的水平有限,所有不能为大家作过多的指导，望大家见谅！");//在这里我想加一个文本框用来放帮助信息。

ce1=new Choice();ce2=new Choice();

btn1=new Button("确定");btn2=new Button("取消");btn1.addActionListener(this);btn2.addActionListener(this);

btn3.addActionListener(this);

ce1.add("华文行楷");ce1.add("华文中宋");ce1.add("华文新魏");ce1.add("华文细黑");ce1.add("宋体");ce1.add("方正姚体");

ce1.add("幼圆");ce1.add("隶书");ce1.add("楷体-GB2312");ce1.add("华文行楷");ce1.add("华文彩云");ce1.add("仿宋-GB2312");

ce2.add("粗体");ce2.add("斜体");ce2.add("常规");

for(int n1=0;n1<=100;n1++)

dialog.add(p1);p1.setBounds(5,30,440,35);p1.setLayout( null);//p1.setBackground(Color.red);

dialog.add(p2);p2.setBounds(5,65,440,27);dialog.add(p3);p3.setBounds(5,90,440,40);//p4.setBounds(5,120,440,138);

p1.add(L1);L1.setBounds(5,15,50,25);p1.add(L2);L2.setBounds(150,15,50,25);

p1.add(L3);L3.setBounds(250,15,50,25);p2.setLayout( null);//p2.setBackground(Color.yellow);

p2.add(ce1);ce1.setBounds(5,0,130,25);p2.add(ce2);ce2.setBounds(160,0,90,25);p2.add(ce3);ce3.setBounds(260,0,75,25);

p2.add(btn1);btn1.setBounds(360,0,75,25);

p3.setLayout( null);p3.add(btn2);btn2.setBounds(360,10,75,25);p3.add(btn3);btn3.setBounds(160,10,75,25);

dialog.add(p4);p4.setBackground(Color.yellow);p4.setBounds(5,120,440,138);

MenuItem Font=new MenuItem("字体");//给字体加监听器

Font.addActionListener(this);

MenuItem Replace=new MenuItem("替换"); MenuItem Seek=new MenuItem("查找");

mb.add(file);mb.add(edit);mb.add(pattern);mb.add(time);mb.add(help);

file.add(renew);file.addSeparator();file.add(open);time.add(tdate);

file.addSeparator(); file.add(exit);file.addSeparator();file.add(save);

edit.add(copy); edit.addSeparator();edit.add(paste);edit.addSeparator();edit.add(cut);

pattern.add(Font); pattern.add(Replace);

pattern.add(Seek);help.add(helptopic);

renew.addActionListener( this);tdate.addActionListener(this);

open.addActionListener(this); save.addActionListener(this);exit.addActionListener(this);

cut.addActionListener(this);copy.addActionListener(this);paste.addActionListener(this);

ce1.addItemListener(this);ce2.addItemListener(this);ce3.addItemListener(this);

add(ta,"Center");ta.setBackground(new Color(249,255,234));

public void itemStateChanged(ItemEvent e){

if(ce2.getSelectedItem().equals("粗体"))

{ k=1;st1=ce1.getSelectedItem();st2=ce3.getSelectedItem();}

if(ce2.getSelectedItem().equals("斜体"))

{ k=2;st1=ce1.getSelectedItem();st2=ce3.getSelectedItem();}

if(ce2.getSelectedItem().equals("常规"))

{ k=3;st1=ce1.getSelectedItem();st2=ce3.getSelectedItem();}

public void actionPerformed(ActionEvent e)

if(e.getActionCommand().equals("新建"))

if(e.getActionCommand().equals("退出"))

if(e.getActionCommand().equals("打开"))

if(e.getActionCommand().equals("保存"))

if(e.getActionCommand().equals("复制"))

if(e.getActionCommand().equals("粘贴"))

{ ta.insert(str,ta.getCaretPosition());}

if(e.getActionCommand().equals("剪切"))

{str=ta.getSelectedText();ta.replaceRange("",ta.getSelectionStart(),ta.getSelectionEnd());

if(e.getActionCommand().equals("字体"))

if(e.getActionCommand().equals("主题"))

if(e.getActionCommand().equals("颜色"))

Color clr=JColorChooser.showDialog(this,"颜色对话框",null);

{ ta.setFont(new Font(st1,Font.BOLD,Integer.parseInt(st2)));}

{ ta.setFont(new Font(st1,Font.ITALIC,Integer.parseInt(st2)));}

{ ta.setFont(new Font(st1,Font.PLAIN,Integer.parseInt(st2)));}

//if(e.getActionCommand().equals("日期/时间"))

//ta.setText(ta.getText()+""+date);

if(e.getActionCommand().equals("日期/时间"))

Calendar c1=Calendar.getInstance();

int y= c1.get(Calendar.YEAR);

int m= c1.get(Calendar.MONTH);

int d= c1.get(Calendar.DATE);

int h= c1.get(Calendar.HOUR);

int m1= c1.get(Calendar.MINUTE);

ta.setText(ta.getText()+""+(y+"年"+m2+"月"+d+"日"+h+":"+m1));

public void openText() throws IOException

FileDialog fd=new FileDialog(this,"打开文件对话框",FileDialog.LOAD);

fd.setVisible(true);FileInputStream fis=new FileInputStream(fd.getDirectory()+fd.getFile());

public void saveText() throws IOException

FileDialog fd=new FileDialog(this,"打开文件对话框",FileDialog.SAVE);

FileOutputStream out=new FileOutputStream(fd.getDirectory()+fd.getFile()+".txt");

for(int n=0;n<str.length();n++)

out.write((byte)str.charAt(n));

public static void main(String[] args)

Editor f=new Editor("记事本程序");

/*Calendar now=Calendar.getInstance();

int year=now.get(Calendar.YEAR);

int month=now.get(Calendar.MONTH)+1;

int day=now.get(Calendar.DATE);

System.out.print(year+"年"+month+"月"+day+"日");

int week=now.get(Calendar.DAY_OF_WEEK);

String str="日一二三四五六";//星期1-7

System.out.println("星期"+str.substring(i,i+2));//对应中文的下标*/

class Mycanvas extends Canvas

img=tk.getImage("photo.jpg");

public void paint(Graphics g)

g.drawImage(img,5,120,440,138,this);

二、如何用记事本进行java编程

安装后需要设置环境变量，在我的电脑--》属性--->高级--->环境变量

加入：JAVA_HOME= C:\Program Files\Java\jdk1.5.0_06

然后把JAVA_HOME加入path中就可以了

PATH=F:\oracle\ora92\bin;C:\Program Files\Oracle\jre\1.3.1\bin;C:\Program Files\Oracle\jre\1.1.8\bin;%JAVA_HOME%\bin;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;C:\PROGRA~1\ULTRAE~1;D:\soft\StyleReportEE\bin

3：工具初学者可以用记事本，（也可以用eclipse,netbeans）

在DOS窗口下找到你保存的JAVA文件目录，执行：javac*.java

在dos窗口下找到你编译的文件目录执行： java*

这样你就可以看到你写的程序的执行结果。

刚开始学Java,用“JDK+记事本”就行了，JDK提供Java开发工具包和运行环境。先下载一个JDK()装上(还有设置环境变量的问题，这里先不说)，用记事本编辑Java代码，在命令行提示窗口用javac命令编译，用java命令执行就可以了。

当你对java程序有个整体感官的认识后，接下来就可以用一个IDE了，即集成开发环境，网上有很多IDE，JBuilder、JCreater以及著名的eclipse,推荐用eclipse,在www.eclipse.org下载，然后自己往里面安装——你需要但还没安装的“插件”(因为，本身已有很多插件，一般情况可以满足你的需要)，最好不要用通过第三方公司进行过集成的 eclipse，比如Lomboz(它的内核也是eclipse,如果你需要Lomboz，则可以把它作为一个插件安装到eclipse中),这样，可以直接感觉eclipse的架构和魅力。

最后，要说的就是，在第一个阶段不要停留太久，要在适当的时候过渡到eclipse；所有上面是一个过程。

三、java的一个简单记事本程序设计

是记事本的样式吗？就要这些要求吗？

下面这些代码的功能挺全的，可以参考一下，不用的可以删掉。

public class NoteBook extends JFrame implements ActionListener,ItemListener,WindowListener,MouseListener

{ Container c= this.getContentPane();

JMenuBar jmb= new JMenuBar();

JColorChooser jcl= new JColorChooser();

JToolBar jToolBar= new JToolBar();

JButton jButton1= new JButton();

JButton jButton2= new JButton();

JButton jButton3= new JButton();

JButton jButton4= new JButton();

JMenu jm1= new JMenu("文件(F)");

JMenu jm2= new JMenu("编辑(E)");

JMenu jm4= new JMenu("格式(O)");

JMenu jm5= new JMenu("查看(V)");

JMenu jm3= new JMenu("帮助(H)");

JMenuItem jmi1= new JMenuItem("新建(N)");

JMenuItem jmi2= new JMenuItem("打开(O)");

JMenuItem jmi3= new JMenuItem("保存(S)");

JMenuItem jmi4= new JMenuItem("退出(X)");

JMenu jmd4=new JMenu("颜色");

JMenu jmd0=new JMenu("字体");

JMenuItem aa=new JMenuItem("复制(C)");

JMenuItem bb=new JMenuItem("剪切(X)");

JMenuItem cc=new JMenuItem("粘贴(V)");

JCheckBoxMenuItem jcuti1= new JCheckBoxMenuItem("粗体");

JCheckBoxMenuItem jxieti1= new JCheckBoxMenuItem("斜体");

JMenuItem jmp1= new JMenuItem("日期和时间");

JMenuItem jmp2= new JMenuItem("背景颜色(H)");

JMenuItem jmi5= new JMenuItem("删除内容(S)");

JMenuItem jmi7=new JMenuItem("关于自己");

JTextArea jta= new JTextArea(23,15);

JScrollPane jsp= new JScrollPane(jta);

JMenuItem jmdb1=new JMenuItem("黄色");//定义各种颜色

JMenuItem jmdb2=new JMenuItem("红色");

JMenuItem jmdb3=new JMenuItem("绿色");

JMenuItem jmdb4=new JMenuItem("蓝色");

JMenuItem jmdb5=new JMenuItem("黑色");

{ this.addWindowListener(this);

c.add(jmb,BorderLayout.NORTH);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

jm5.setMnemonic('v');//查看

jmi1.addActionListener(this);//新建

jmi1.setAccelerator(KeyStroke.getKeyStroke('N',Event.CTRL_MASK,false));

jmi2.setAccelerator(KeyStroke.getKeyStroke('O',Event.CTRL_MASK,false));

jmi2.addActionListener(this);//打开

jmi3.setAccelerator(KeyStroke.getKeyStroke('S',Event.CTRL_MASK,false));

jmi3.addActionListener(this);//保存

jmi1.setMnemonic('n');

jmi2.setMnemonic('o');

jmi3.setMnemonic('s');

jmi4.setMnemonic('x');

jmi4.addActionListener(this);//退出

jmd4.addActionListener(this);//添加监视器

jmdb1.addActionListener(this);

jmdb2.addActionListener(this);

jmdb3.addActionListener(this);

jmdb4.addActionListener(this);

jmdb5.addActionListener(this);

jmp1.addActionListener(this);//日期时间

jmp2.addActionListener(this);//背景颜色

aa.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_MASK));

bb.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.CTRL_MASK));

cc.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,InputEvent.CTRL_MASK));

aa.addActionListener(this);//复制

bb.addActionListener(this);//剪切

cc.addActionListener(this);//粘贴

jcuti1.addItemListener(this);//粗体

jxieti1.addItemListener(this);//斜体

jmi7.addActionListener(this);//关于自己

c.add(jToolBar,BorderLayout.CENTER);//工具条

jButton2.setIcon(new ImageIcon("image\\new.JPG"));//新建

jButton2.setToolTipText("新建");

jButton2.addActionListener(this);

jButton1.setIcon(new ImageIcon("image\\open.JPG"));//打开

jButton1.setToolTipText("打开");

jButton1.addActionListener(this);

jButton3.setIcon(new ImageIcon("image\\save.JPG"));//保存

jButton3.setToolTipText("保存");

jButton3.addActionListener(this);

jButton4.setIcon(new ImageIcon("image\\qq.JPG"));

jButton4.addActionListener(this);//退出

jButton4.setToolTipText("退出");

c.add(jsp,BorderLayout.SOUTH);

this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

jmdb1.addActionListener(new ActionListener()//黄色

{ public void actionPerformed(ActionEvent e)

{ jta.setForeground(Color.yellow);

jmdb2.addActionListener(new ActionListener()//红色

{ public void actionPerformed(ActionEvent e)

{ jta.setForeground(Color.red);

jmdb3.addActionListener(new ActionListener()//绿色

{ public void actionPerformed(ActionEvent e)

{ jta.setForeground(Color.green);

jmdb4.addActionListener(new ActionListener()//蓝色

public void actionPerformed(ActionEvent e)

jta.setForeground(Color.blue);

jmdb5.addActionListener(new ActionListener()//黑色

public void actionPerformed(ActionEvent e)

jta.setForeground(Color.black);

public void actionPerformed(ActionEvent e)

{ if(e.getSource()==jmi1)//新建

this.setTitle("无标题-记事本");

JFileChooser jfc1= new JFileChooser();

int num1= jfc1.showOpenDialog(this);

if(num1==JFileChooser.APPROVE_OPTION)

FileReader fr= new FileReader(f1);

BufferedReader br= new BufferedReader(fr);

while((str= br.readLine())!=null)

catch(FileNotFoundException e1)

catch(IOException e2){e2.printStackTrace();}

JFileChooser jfc2= new JFileChooser();

int num2= jfc2.showSaveDialog(this);

if(num2==JFileChooser.APPROVE_OPTION){

FileWriter fw= new FileWriter(f2);

BufferedWriter bw= new BufferedWriter(fw);

int a= JOptionPane.showConfirmDialog(this,"文件已被改变，是否要保存？","提示",JOptionPane.YES_NO_CANCEL_OPTION);

JFileChooser jfc2= new JFileChooser();

int num2= jfc2.showSaveDialog(this);

if(num2==JFileChooser.APPROVE_OPTION){

FileWriter fw= new FileWriter(f2);

BufferedWriter bw= new BufferedWriter(fw);

if(e.getSource()==jmp1)//日期时间

Calendar c1=Calendar.getInstance();

int m= c1.get(Calendar.MONTH);

int m1= c1.get(Calendar.MINUTE);

jta.setText(y+"年"+m2+"月"+d+"日"+h+":"+m1);

if(e.getSource()==jmp2)//背景色

{ Color ccc= JColorChooser.showDialog(this,"color",Color.BLACK);

jta.setSelectedTextColor(ccc);

if(e.getSource()==jButton1)//打开

JFileChooser jfc1= new JFileChooser();

int num1= jfc1.showOpenDialog(this);

if(num1==JFileChooser.APPROVE_OPTION)

FileReader fr= new FileReader(f1);

BufferedReader br= new BufferedReader(fr);

while((str= br.readLine())!=null)

catch(FileNotFoundException e1)

catch(IOException e2){e2.printStackTrace();}

jta.replaceRange("",jta.getSelectionStart(),jta.getSelectionEnd());//删除

JFileChooser jfc2= new JFileChooser();

int num2= jfc2.showSaveDialog(this);

if(num2==JFileChooser.APPROVE_OPTION){

FileWriter fw= new FileWriter(f2);

BufferedWriter bw= new BufferedWriter(fw);

else if(e.getSource()==bb)//剪切

else if(e.getSource()==cc)//粘贴

{int a= JOptionPane.showConfirmDialog(this,"文件已被改变，是否要保存？","提示",JOptionPane.YES_NO_CANCEL_OPTION);

JFileChooser jfc2= new JFileChooser();

int num2= jfc2.showSaveDialog(this);

if(num2==JFileChooser.APPROVE_OPTION){

FileWriter fw= new FileWriter(f2);

BufferedWriter bw= new BufferedWriter(fw);

//if(e.getSource()==jmi7)//关于我

//{About1 a=new About1();//实现跳转

public void itemStateChanged(ItemEvent e)//字体

{Font c=new Font("Serif",Font.PLAIN,14);

if(e.getItemSelectable()==jcuti1)

{ Font f=new Font("Serif",Font.BOLD,20);//粗体

else if(e.getItemSelectable()==jxieti1)

{ Font b=new Font("Serif",Font.ITALIC,20);//斜体

public static void main(String[] args)//入口

public void windowOpened(WindowEvent arg0){}

public void windowClosing(WindowEvent arg0){

int a= JOptionPane.showConfirmDialog(this,"文件已被改变，是否要保存？","提示",JOptionPane.YES_NO_CANCEL_OPTION);

JFileChooser jfc2= new JFileChooser();

int num2= jfc2.showSaveDialog(this);

if(num2==JFileChooser.APPROVE_OPTION){

FileWriter fw= new FileWriter(f2);

BufferedWriter bw= new BufferedWriter(fw);

public void windowClosed(WindowEvent arg0){}

public void windowIconified(WindowEvent arg0){}

public void windowDeiconified(WindowEvent arg0){}

public void windowActivated(WindowEvent arg0){}

public void windowDeactivated(WindowEvent arg0){}

public void mouseClicked(MouseEvent arg0){}

public void mousePressed(MouseEvent arg0){}

public void mouseReleased(MouseEvent arg0){}

public void mouseEntered(MouseEvent arg0){}

public void mouseExited(MouseEvent arg0){}