博学谷java记事本代码,记事本源代码java

java记事本源代码

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···

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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();

}

}

java编写一个记事本小程序，接着下面的代码写，求大神解救！实现新建，保存，打开功能就行！

package tuxingjiemian;

import javax.swing.*;

import javax.swing.event.*;

import java.awt.*;

import java.awt.event.*;

import java.io.File;

import java.io.PrintStream;

public class jishiben extends JFrame {

JPanel jp=new JPanel();

JFrame find_replace=new JFrame();

JMenu file=new JMenu("文件");

JMenu edit=new JMenu("编辑");

JMenu help=new JMenu("帮助");

JMenuBar menubar=new JMenuBar();

JTextArea aa=new JTextArea();

class Open implements ActionListener {

public void actionPerformed(ActionEvent e) {

JFileChooser jf= new JFileChooser();

jf.showOpenDialog(jishiben.this);

try {

PrintStream p=new PrintStream(jf.getSelectedFile().getPath());

} catch (Exception e2) {

}

}

}

class Save implements ActionListener {

public void actionPerformed(ActionEvent e) {

JFileChooser jf= new JFileChooser();

jf.showSaveDialog(jishiben.this);

try {

PrintStream p=new PrintStream(jf.getSelectedFile().getPath());

} catch (Exception e2) {

}

}

}

public jishiben(){

this.setTitle("记事本");

this.setSize(500, 500);

this.setLayout(new BorderLayout());

JMenuItem open=new JMenuItem("打开");

open.addActionListener(new Open());

JMenuItem save=new JMenuItem("保存");

save.addActionListener(new Save());

JMenuItem exit=new JMenuItem("退出");

exit.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

System.exit(0);

}

});

file.add(open);

file.add(save);

file.addSeparator();

file.add(exit);

menubar.add(file);

this.add(new JScrollPane(aa),BorderLayout.CENTER);

JMenuItem copy=new JMenuItem("复制");

JMenuItem past=new JMenuItem("粘贴");

JMenuItem delete=new JMenuItem("删除");

JMenuItem find=new JMenuItem("查找");

JMenuItem replace=new JMenuItem("替换");

copy.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

jishiben.this.aa.copy();

}

});

past.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

jishiben.this.aa.paste();

}

});

delete.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

jishiben.this.aa.replaceSelection(null);

}

});

edit.add(copy);

edit.add(past);

edit.add(delete);

edit.add(find);

edit.add(replace);

menubar.add(edit);

help.add(new JMenuItem("帮助"));

menubar.add(help);

this.add(menubar,BorderLayout.NORTH);

this.setVisible(true);

this.setDefaultCloseOperation(this.EXIT_ON_CLOSE);

}

public static void main(String[] args) {

new jishiben();

}

};

用JAVA编个简单的记事本程序

import java.awt.event.*;

import java.awt.*;

import java.io.*;

import java.util.Calendar;

import java.util.Date;

import javax.swing.*;

class Editor extends Frame implements ActionListener,ItemListener

{

// Date date=new Date();

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

JTextArea ta=new JTextArea(50,50);

Dialog dialog,dialog1;

Choice ce1,ce2,ce3;

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

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

public Editor (String s)

{

super ("记事本编辑板");

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

setIconImage(YouImg.getImage());

addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

dispose();

System.exit(0);

}

});

setBounds(50,35,700,500);

MenuBar mb=new MenuBar();

setMenuBar(mb);

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){

dialog.setVisible(false);}

});

dialog1.addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

dialog1.setVisible(false);}

});

//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();

ce3=new Choice();

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

btn3=new Button("颜色");

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++)

{ce3.add(""+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.setLayout( null);

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);

dialog1.add(ta1);

//设置字体的下拉情况

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");

//首要添加组件的情况

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);

//给必要的组件加上监听器

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);

//添加必要的组件

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

setSize(700,500);

setVisible(true);

this.validate() ;

}

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"))

{System.out.println("new ");

ta.setText("");}

if(e.getActionCommand().equals("退出"))

{ System.exit(0);}

try

{

if(e.getActionCommand().equals("打开"))

openText();

if(e.getActionCommand().equals("保存"))

saveText();

}catch(IOException e1){}

if(e.getActionCommand().equals("复制"))

{ str=ta.getSelectedText();}

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"))

{dialog.setVisible(true);}

if(e.getActionCommand().equals("主题"))

{dialog1.setVisible(true);}

if(e.getActionCommand().equals("颜色"))

{

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

ta.setForeground(clr);

}

if(e.getSource()==btn2)

dialog.setVisible(false);

if(e.getSource()==btn1)

{

if(k==1)

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

if(k==2)

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

if(k==3)

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

dialog.setVisible(false);

}

//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);

int m2 = m+1;

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());

ta.setText("");

int n=0;

while((n=fis.read())!=-1)

ta.append(""+(char)n);

fis.close();

}

public void saveText() throws IOException

{

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

fd.setVisible(true);

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

String str=ta.getText();

String str1=ta.getText();

for(int n=0;nstr.length();n++)

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

out.close();

}

public static void main(String[] args)

{

Editor f=new Editor(" 记事本程序");

//添加时间代码

Date date=new Date();

System.out.print(date);

/*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

int i=2*(week-1);

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

}

class dialog extends Dialog

{

public dialog()

{

super(dialog, "字体设置");

class Mycanvas extends Canvas

{

Toolkit tk;

Image img;

Mycanvas()

{

setSize(440,138);

tk=getToolkit();

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

}

public void paint(Graphics g)

{

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

}

}

}

}

}

求一个记事本的JAVA源代码

/*

* WriteBoard.java

*

* Created on 2006年12月19日, 下午7:26

*/

/**

*

* @author LecH.giF

*/

import java.awt.datatransfer.*;

import java.awt.event.*;

import java.awt.*;

import java.io.*;

import java.awt.FileDialog;

public class WriteBoard extends java.awt.Frame {

Clipboard clipboard =null;

FileDialog fc = new FileDialog(this);

/** Creates new form WriteBoard */

public WriteBoard() {

clipboard = getToolkit().getSystemClipboard();

initComponents();

}

/** This method is called from within the constructor to

* initialize the form.

* WARNING: Do NOT modify this code. The content of this method is

* always regenerated by the Form Editor.

*/

// editor-fold defaultstate="collapsed" desc=" Generated Code "

private void initComponents() {

textArea1 = new java.awt.TextArea();

menuBar1 = new java.awt.MenuBar();

menu1 = new java.awt.Menu();

menuItem1 = new java.awt.MenuItem();

menuItem2 = new java.awt.MenuItem();

menuItem3 = new java.awt.MenuItem();

menuItem4 = new java.awt.MenuItem();

menuItem5 = new java.awt.MenuItem();

menu2 = new java.awt.Menu();

menuItem6 = new java.awt.MenuItem();

menuItem7 = new java.awt.MenuItem();

menuItem8 = new java.awt.MenuItem();

setTitle("WriteBoard");

addWindowListener(new java.awt.event.WindowAdapter() {

public void windowClosing(java.awt.event.WindowEvent evt) {

exitForm(evt);

}

});

add(textArea1, java.awt.BorderLayout.CENTER);

menu1.setLabel("Menu");

menuItem1.setLabel("\u65b0\u5efa");

menuItem1.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

newText(evt);

}

});

menu1.add(menuItem1);

menuItem2.setLabel("\u6253\u5f00");

menuItem2.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

open(evt);

}

});

menu1.add(menuItem2);

menuItem3.setLabel("\u4fdd\u5b58");

menuItem3.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

menuItem3ActionPerformed(evt);

}

});

menu1.add(menuItem3);

menuItem4.setLabel("\u53e6\u5b58\u4e3a");

menuItem4.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

menuItem4ActionPerformed(evt);

}

});

menu1.add(menuItem4);

menuItem5.setLabel("\u9000\u51fa");

menuItem5.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

exit(evt);

}

});

menu1.add(menuItem5);

menuBar1.add(menu1);

menu2.setLabel("\u7f16\u8f91");

menuItem6.setLabel("\u526a\u5207");

menuItem6.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

menuItem6ActionPerformed(evt);

}

});

menu2.add(menuItem6);

menuItem7.setLabel("\u590d\u5236");

menuItem7.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

menuItem7ActionPerformed(evt);

}

});

menu2.add(menuItem7);

menuItem8.setLabel("\u7c98\u8d34");

menuItem8.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent evt) {

menuItem8ActionPerformed(evt);

}

});

menu2.add(menuItem8);

menuBar1.add(menu2);

setMenuBar(menuBar1);

pack();

}// /editor-fold

private void menuItem4ActionPerformed(java.awt.event.ActionEvent evt) {

fc.show();

if(fc.getFile()!=null){

File file = new File(fc.getFile());

try {

PrintWriter pw = new PrintWriter(file);

pw.print(textArea1.getText());

pw.flush();

pw.close();

} catch (FileNotFoundException ex) {

ex.printStackTrace();

}

}

else{

return;

}

}

private void menuItem3ActionPerformed(java.awt.event.ActionEvent evt) {

fc.show();

if(fc.getFile()!=null){

File file = new File(fc.getFile());

try {

PrintWriter pw = new PrintWriter(file);

pw.print(textArea1.getText());

pw.flush();

pw.close();

} catch (FileNotFoundException ex) {

ex.printStackTrace();

}

}

else{

return;

}

}

private void menuItem8ActionPerformed(java.awt.event.ActionEvent evt) {

Transferable contents = clipboard.getContents(this);

DataFlavor flavor = DataFlavor.stringFlavor;

if(contents.isDataFlavorSupported(flavor))

try{

String str;

str=(String)contents.getTransferData(flavor);

textArea1.append(str);

}catch(Exception e){}

}

private void menuItem7ActionPerformed(java.awt.event.ActionEvent evt) {

String temp = this.textArea1.getSelectedText();

StringSelection text = new StringSelection(temp);

clipboard.setContents(text,null);

}

private void menuItem6ActionPerformed(java.awt.event.ActionEvent evt) {

String temp = this.textArea1.getSelectedText();

StringSelection text = new StringSelection(temp);

clipboard.setContents(text,null);

int start = textArea1.getSelectionStart();

int end = textArea1.getSelectionEnd();

textArea1.replaceRange("",start,end);

}

private void open(java.awt.event.ActionEvent evt) {

fc.show();

if(fc.getFile()!=null){

File file = new File(fc.getFile());

try {

FileReader fr = new FileReader(file);

BufferedReader br = new BufferedReader(fr);

String s;

try {

while((s= br.readLine())!=null){

textArea1.append(s+"\n");

}

fr.close();

br.close();

} catch (IOException ex) {

ex.printStackTrace();

}

} catch (FileNotFoundException ex) {

ex.printStackTrace();

}

}

else{

return;

}

}

private void newText(java.awt.event.ActionEvent evt) {

this.textArea1.setText("");

}

private void exit(java.awt.event.ActionEvent evt) {

System.exit(0);

}

/** Exit the Application */

private void exitForm(java.awt.event.WindowEvent evt) {

System.exit(0);

}

/**

* @param args the command line arguments

*/

public static void main(String args[]) {

java.awt.EventQueue.invokeLater(new Runnable() {

public void run() {

new WriteBoard().setVisible(true);

}

});

}

// Variables declaration - do not modify

private java.awt.Menu menu1;

private java.awt.Menu menu2;

private java.awt.MenuBar menuBar1;

private java.awt.MenuItem menuItem1;

private java.awt.MenuItem menuItem2;

private java.awt.MenuItem menuItem3;

private java.awt.MenuItem menuItem4;

private java.awt.MenuItem menuItem5;

private java.awt.MenuItem menuItem6;

private java.awt.MenuItem menuItem7;

private java.awt.MenuItem menuItem8;

private java.awt.TextArea textArea1;

// End of variables declaration

}

java简单记事本源代码 带解释

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.border.*;

class test implements ActionListener

{

JFrame frame;

JButton b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,b12,b13,b14,b15,b16,b17,b18,b19,b20,b21,b22,b23,b24,b25,b26,b27,b28,b29,b30,b31;

JTextArea ta;

JPanel p1,p2,p3,p4;

JMenuBar mb;

JMenu m1,m2,m3;

JMenuItem mt1,mt2,mt3,mt4,mt5,mt6,mt7;

JRadioButton rb1,rb2;

ButtonGroup bg;

Double d1=0.0,d2=0.0,d3=0.0,d4=1.0,d5=1.0;

String s1="",s2="",s3="",s4="";

int a=0;

char c1;

int i=0;

public static void main(String[] args)

{

test that=new test();

that.go();

}

public void go()

{

frame=new JFrame("计算器");

Container cp= frame.getContentPane();

cp.setLayout(new FlowLayout());

b1=new JButton("7");b2=new JButton("8");b3=new JButton("9");b4=new JButton("/");b5=new JButton("1/x");b6=new JButton("sin");b7=new JButton("log");

b8=new JButton("4");b9=new JButton("5");b10=new JButton("6");b11=new JButton("*");b12=new JButton("x^y");b13=new JButton("cos");b14=new JButton("ln");

b15=new JButton("1");b16=new JButton("2");b17=new JButton("3");b18=new JButton("-");b19=new JButton(new ImageIcon("lanying.gif"));b20=new JButton("tan");b21=new JButton("x^3");

b22=new JButton("0");b23=new JButton("+/-");b24=new JButton(".");b25=new JButton("+");b26=new JButton("√x");b27=new JButton("cot");b28=new JButton("x^2");

b29=new JButton("Backspace");b30=new JButton("C");b31=new JButton("=");

mb=new JMenuBar();

m1=new JMenu("文件(F)");m2=new JMenu("编辑(E)");m3=new JMenu("帮助(H)");

mt1=new JMenuItem("清零");mt2=new JMenuItem("退出");mt3=new JMenuItem("复制");mt4=new JMenuItem("粘贴");mt5=new JMenuItem("版本");mt6=new JMenuItem("标准型");mt7=new JMenuItem("科学型");

ta=new JTextArea(1,30);

p1=new JPanel();p2=new JPanel();p3=new JPanel();p4=new JPanel();

rb1=new JRadioButton("科学型");rb2=new JRadioButton("标准型");

bg=new ButtonGroup();

b1.setForeground(Color.blue);b1.setBackground(Color.white);b2.setForeground(Color.blue);b2.setBackground(Color.white);

b3.setForeground(Color.blue);b3.setBackground(Color.white);b8.setForeground(Color.blue);b8.setBackground(Color.white);

b9.setForeground(Color.blue);b9.setBackground(Color.white);b10.setForeground(Color.blue);b10.setBackground(Color.white);

b15.setForeground(Color.blue);b15.setBackground(Color.white);b16.setForeground(Color.blue);b16.setBackground(Color.white);

b17.setForeground(Color.blue);b17.setBackground(Color.white);b22.setForeground(Color.blue);b22.setBackground(Color.white);

b23.setForeground(Color.blue);b23.setBackground(Color.white);b24.setForeground(Color.blue);b24.setBackground(Color.white);

b4.setForeground(Color.red);b4.setBackground(Color.white);b11.setForeground(Color.red);b11.setBackground(Color.white);

b18.setForeground(Color.red);b18.setBackground(Color.white);b25.setForeground(Color.red);b25.setBackground(Color.white);

b5.setForeground(Color.blue);b5.setBackground(Color.white);b6.setForeground(Color.blue);b6.setBackground(Color.white);

b7.setForeground(Color.blue);b7.setBackground(Color.white);b12.setForeground(Color.blue);b12.setBackground(Color.white);

b13.setForeground(Color.blue);b13.setBackground(Color.white);b14.setForeground(Color.blue);b14.setBackground(Color.white);

b19.setForeground(Color.blue);b19.setBackground(Color.white);b20.setForeground(Color.blue);b20.setBackground(Color.white);

b21.setForeground(Color.blue);b21.setBackground(Color.white);b26.setForeground(Color.blue);b26.setBackground(Color.white);

b27.setForeground(Color.blue);b27.setBackground(Color.white);b28.setForeground(Color.blue);b28.setBackground(Color.white);

b29.setForeground(Color.red);b29.setBackground(Color.white);b30.setForeground(Color.red);b30.setBackground(Color.white);

b31.setForeground(Color.red);b31.setBackground(Color.white);

bg.add(rb1);bg.add(rb2);

p1.setBackground(Color.yellow);

cp.setBackground(Color.CYAN);

m1.setMnemonic(KeyEvent.VK_F);m2.setMnemonic(KeyEvent.VK_E);m3.setMnemonic(KeyEvent.VK_H);

m1.add(mt6);m1.add(mt7);m1.addSeparator();m1.add(mt1);m1.addSeparator();m1.add(mt2);m2.add(mt3);m2.addSeparator();m2.add(mt4);m3.add(mt5);

mb.add(m1);mb.add(m2);mb.add(m3);

frame.setJMenuBar(mb);

p2.setLayout(new GridLayout(4,7));

p3.setLayout(new GridLayout(1,3));

ta.setEditable(false);

p1.add(ta);

p2.add(b1);p2.add(b2);p2.add(b3);p2.add(b4);p2.add(b5);p2.add(b6);p2.add(b7);

p2.add(b8);p2.add(b9);p2.add(b10);p2.add(b11);p2.add(b12);p2.add(b13);p2.add(b14);

p2.add(b15);p2.add(b16);p2.add(b17);p2.add(b18);p2.add(b19);p2.add(b20);p2.add(b21);

p2.add(b22);p2.add(b23);p2.add(b24);p2.add(b25);p2.add(b26);p2.add(b27);p2.add(b28);

p3.add(b29);p3.add(b30);p3.add(b31);

Border etched=BorderFactory.createEtchedBorder();

Border border=BorderFactory.createTitledBorder(etched,"计算类型");

p4.add(rb1);p4.add(rb2);

p4.setBorder(border);

b2.setActionCommand("8");

b2.addActionListener(this);

cp.add(p1);cp.add(p4);cp.add(p2);cp.add(p3);

frame.setSize(400,330);

frame.setVisible(true);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

b1.setActionCommand("7");

b1.addActionListener(this);

b2.setActionCommand("8");

b2.addActionListener(this);

b3.setActionCommand("9");

b3.addActionListener(this);

b4.setActionCommand("/");

b4.addActionListener(this);

b5.setActionCommand("1/x");

b5.addActionListener(this);

b6.setActionCommand("sin");

b6.addActionListener(this);

b7.setActionCommand("log");

b7.addActionListener(this);

b8.setActionCommand("4");

b8.addActionListener(this);

b9.setActionCommand("5");

b9.addActionListener(this);

b10.setActionCommand("6");

b10.addActionListener(this);

b11.setActionCommand("*");

b11.addActionListener(this);

b12.setActionCommand("x^y");

b12.addActionListener(this);

b13.setActionCommand("cos");

b13.addActionListener(this);

b14.setActionCommand("ln");

b14.addActionListener(this);

b15.setActionCommand("1");

b15.addActionListener(this);

b16.setActionCommand("2");

b16.addActionListener(this);

b17.setActionCommand("3");

b17.addActionListener(this);

b18.setActionCommand("-");

b18.addActionListener(this);

b19.setActionCommand("x!");

b19.addActionListener(this);

b20.setActionCommand("tan");

b20.addActionListener(this);

b21.setActionCommand("x^3");

b21.addActionListener(this);

b22.setActionCommand("0");

b22.addActionListener(this);

b23.setActionCommand("+/-");

b23.addActionListener(this);

b24.setActionCommand(".");

b24.addActionListener(this);

b25.setActionCommand("+");

b25.addActionListener(this);

b26.setActionCommand("√x");

b26.addActionListener(this);

b27.setActionCommand("cot");

b27.addActionListener(this);

b28.setActionCommand("x^2");

b28.addActionListener(this);

b29.setActionCommand("Backspace");

b29.addActionListener(this);

b30.setActionCommand("C");

b30.addActionListener(this);

b31.setActionCommand("=");

b31.addActionListener(this);

rb1.setActionCommand("kxx");

rb1.addActionListener(this);

rb2.setActionCommand("bzx");

rb2.addActionListener(this);

}

public void actionPerformed(ActionEvent e) //throws Exception

{

if (e.getActionCommand()=="bzx")

{

b5.setEnabled(false);b6.setEnabled(false);b7.setEnabled(false);

b12.setEnabled(false);b13.setEnabled(false);b14.setEnabled(false);

b19.setEnabled(false);b20.setEnabled(false);b21.setEnabled(false);

b26.setEnabled(false);b27.setEnabled(false);b28.setEnabled(false);

}

if (e.getActionCommand()=="kxx")

{

b5.setEnabled(true);b6.setEnabled(true);b7.setEnabled(true);

b12.setEnabled(true);b13.setEnabled(true);b14.setEnabled(true);

b19.setEnabled(true);b20.setEnabled(true);b21.setEnabled(true);

b26.setEnabled(true);b27.setEnabled(true);b28.setEnabled(true);

}

if (e.getActionCommand()=="1")

{

ta.append("1");

}

if (e.getActionCommand()=="2")

{

ta.append("2");

}

if (e.getActionCommand()=="3")

{

ta.append("3");

}

if (e.getActionCommand()=="4")

{

ta.append("4");

}

if (e.getActionCommand()=="5")

{

ta.append("5");

}

if (e.getActionCommand()=="6")

{

ta.append("6");

}

if (e.getActionCommand()=="7")

{

ta.append("7");

}

if (e.getActionCommand()=="8")

{

ta.append("8");

}

if (e.getActionCommand()=="9")

{

ta.append("9");

}

if (e.getActionCommand()=="0")

{

ta.append("0");

}

if (e.getActionCommand()=="+")

{

s1=ta.getText();

d1 = Double.parseDouble(s1);

ta.setText("");

i=1;

}

if (e.getActionCommand()=="-")

{

s1=ta.getText();

d1 = Double.parseDouble(s1);

ta.setText("");

i=2;

}

if (e.getActionCommand()=="*")

{

s1=ta.getText();

d1 = Double.parseDouble(s1);

ta.setText("");

i=3;

}

if (e.getActionCommand()=="/")

{

s1=ta.getText();

d1 = Double.parseDouble(s1);

ta.setText("");

i=4;

}

if (e.getActionCommand()=="=")

{

s2=ta.getText();

d2=Double.parseDouble(s2);

if(i==1)

{

d3=d1+d2;

ta.setText( d3.toString());

}

if(i==2)

{

d3=d1-d2;

ta.setText( d3.toString());

}

if(i==3)

{

d3=d1*d2;

ta.setText( d3.toString());

}

if(i==4)

{

if(d2==0.0)

ta.setText("ERROR");

else

{

d3=d1/d2;

ta.setText( d3.toString());

}

}

if (i==5)

{

s2=ta.getText();

d2 = Double.parseDouble(s2);

for (int l=1;l=d2 ; l++)

{

d5=d5*d1;

}

ta.setText( d5.toString());

}

}

if (e.getActionCommand()=="C")

{

ta.setText("");

d4=1.0;

d5=1.0;

}

/*if (e.getActionCommand()=="Backspace")

{

s3=ta.getText();

a=s3.length();

//ta.cut(ta.select(a-1,a));

s4=ta.getText(1,3);

ta.setText(s4);

}

*/

if (e.getActionCommand()=="1/x")

{

s1=ta.getText();

d1 = Double.parseDouble(s1);

d2=1/d1;

ta.setText( d2.toString());

}

if (e.getActionCommand()==".")

{

ta.append(".");

}

if (e.getActionCommand()=="+/-")

{

s1=ta.getText();

d1 = Double.parseDouble(s1);

d2=0-d1;

ta.setText( d2.toString());

}

if (e.getActionCommand()=="x^2")

{

s1=ta.getText();

d1 = Double.parseDouble(s1);

d2=d1*d1;

ta.setText( d2.toString());

}

if (e.getActionCommand()=="x^3")

{

s1=ta.getText();

d1 = Double.parseDouble(s1);

d2=d1*d1*d1;

ta.setText( d2.toString());

}

if (e.getActionCommand()=="x^y")

{

s1=ta.getText();

d1 = Double.parseDouble(s1);

ta.setText("");

i=5;

// d2=d1*d1*d1;

// ta.setText( d2.toString());

}

if (e.getActionCommand()=="√x")

{

s1=ta.getText();

d1 = Double.parseDouble(s1);

d2=Math.sqrt(d1);

ta.setText( d2.toString());

}

if (e.getActionCommand()=="x!")

{

s1=ta.getText();

d1 = Double.parseDouble(s1);

if (d10)

{

ta.setText( "error");

}

else if (d1==0)

{

ta.setText( "0.0");

}

else {

for (int k=1;k=d1 ;k++ )

d4=d4*k;

ta.setText( d4.toString());

}

}

if (e.getActionCommand()=="sin")

{

s1=ta.getText();

d1 = Double.parseDouble(s1);

d2=Math.sin(3.1415926*d1/180);

ta.setText( d2.toString());

}

}

}

使用记事本编写JAVA程序,并运行输出结果,具体的实现步骤是什么?

1、首先在电脑中新建一个记事本，将记事本的后缀改为“.java”，如下图所示。

2、然后使用记事本的方式打开，输入java程序代码，如下图所示。

3、接着在键盘上按“win+R”快捷键键打开运行，输入“cmd”，如下图所示。

4、在命令行输入“D:”，按“Enter”键进去D盘，再输入“cd Desktop”进去Desktop文件夹，如下图所示。

5、最后再输入“javac Test.java”，按“Enter”键编译java程序，如下图所示就完成了。