安卓简单记事本源代码（android简易记账本源码）

本篇文章给大家谈谈安卓简单记事本源代码，以及android简易记账本源码对应的知识点，希望对各位有所帮助，不要忘了收藏本站喔。

本文目录一览：

• 1、求一个用JAVA写的简单的记事本源代码程序 要有运行结果的截图和源代码，在线等
• 2、怎么查看安卓的源代码？或者安卓应用软件的源代码？
• 3、java简单记事本源代码 带解释
• 4、简易记事本代码
• 5、求简单的java计算器或记事本源代码，需要详细的注释，万分感激。麻烦帮忙发我邮箱1085374312@qq.com。谢谢
• 6、求一个用JAVA写的简单的记事本源代码程序

求一个用JAVA写的简单的记事本源代码程序 要有运行结果的截图和源代码，在线等

这个是我以前写着玩的一个例子，可以运行起来看看，有保存，撤销，复制，剪切功能，自己研究研究

package test;

import java.awt.Font;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

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.JFileChooser;

import javax.swing.JFrame;

import javax.swing.JMenu;

import javax.swing.JMenuBar;

import javax.swing.JMenuItem;

import javax.swing.JOptionPane;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

public class MyNote {

private JFrame frame = new JFrame("记事本");

private JTextArea text = new JTextArea();

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

public MyNote() {

JMenuBar bar = new JMenuBar();

JMenu edit = new JMenu("check");

JMenu check = new JMenu("edit");

JMenu help = new JMenu("help");

JMenuItem term = new JMenuItem("copy");

JMenuItem term1 = new JMenuItem("paste");

JMenuItem term2 = new JMenuItem("cut");

JMenuItem term3 = new JMenuItem("backout");

JMenuItem term4 = new JMenuItem("import");

JMenuItem term5 = new JMenuItem("open");

JMenuItem term6 = new JMenuItem("exit");

JMenuItem term7 = new JMenuItem("save to");

JMenuItem term8 = new JMenuItem("about");

JMenuItem term9 = new JMenuItem("save");

JMenuItem term10 = new JMenuItem("new");

Font font = new Font(null, JFrame.ABORT, 24);

text.setFont(font);

JScrollPane scroll = new JScrollPane(text);

frame.setJMenuBar(bar);

bar.add(edit);

bar.add(check);

bar.add(help);

edit.add(term7);

edit.add(term4);

edit.add(term5);

edit.add(term6);

check.add(term);

check.add(term1);

check.add(term2);

check.add(term3);

help.add(term8);

check.add(term9);

edit.add(term10);

frame.add(scroll);

text.setVisible(false);

frame.setSize(400, 400);

frame.setVisible(true);

frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);

frame.setLocation(500, 500);

// 事件注册

MenuListener m = new MenuListener();

term5.addActionListener(m);

NewListener n = new NewListener();

term4.addActionListener(n);

SaveListener s = new SaveListener();

term7.addActionListener(s);

CopyListener c = new CopyListener();

term.addActionListener(c);

PasteListener p = new PasteListener();

term1.addActionListener(p);

CutListener c1 = new CutListener();

term2.addActionListener(c1);

HelpListener h = new HelpListener();

term8.addActionListener(h);

ExitListener e = new ExitListener();

term6.addActionListener(e);

CloseListener c2 = new CloseListener();

frame.addWindowListener(c2);

BackOutListener b = new BackOutListener();

term3.addActionListener(b);

SaveActionListener s1 = new SaveActionListener();

term9.addActionListener(s1);

NewFileListener n1 = new NewFileListener();

term10.addActionListener(n1);

}

private class MenuListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

text.setVisible(true);

}

}

// 打开新文件

private class NewListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

text.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) {

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

}

fr.close();

} catch (IOException e1) {

e1.printStackTrace();

}

}

}

}

// 另存为

private class SaveListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

JFileChooser filechoose = new JFileChooser();

int r = filechoose.showSaveDialog(frame);

if (r == JFileChooser.APPROVE_OPTION) {

File file = filechoose.getSelectedFile();

try {

FileWriter writer = new FileWriter(file);

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

writer.close();

// 下面方法也可以

/*

* PrintWriter print=new PrintWriter(file);

* print.write(text.getText()); print.close();

*/

} catch (IOException e1) {

e1.printStackTrace();

}

}

}

}

// 复制

private class CopyListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

text.copy();

}

}

// 粘贴

private class PasteListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

text.paste();

}

}

// 剪切

private class CutListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

text.cut();

}

}

// 关于主题

private class HelpListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

JOptionPane.showMessageDialog(frame, "汪雄辉的无敌记事本");

}

}

private class ExitListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

JOptionPane.showMessageDialog(frame, "谢谢！");

try {

Thread.sleep(2000);

System.exit(0);

} catch (InterruptedException e1) {

e1.printStackTrace();

}

}

}

private class CloseListener implements WindowListener {

public void windowActivated(WindowEvent e) {

}

public void windowClosed(WindowEvent e) {

}

// 关闭窗口

public void windowClosing(WindowEvent 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 || !(text.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) text.getText());

writer.close();

System.exit(0);

// 下面方法也可以

/*

* PrintWriter print=new PrintWriter(file);

* print.write(text.getText()); print.close();

*/

} catch (IOException e1) {

e1.printStackTrace();

}

} else {

}

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

System.exit(0);

} else {

}

} else

System.exit(0);

}

public void windowDeactivated(WindowEvent e) {

}

public void windowDeiconified(WindowEvent e) {

}

public void windowIconified(WindowEvent e) {

}

public void windowOpened(WindowEvent e) {

}

}

// 撤销

private class BackOutListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

if (flag == false)

text.setText("");

else {

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) {

text.setText(new String(buf, 0, len));

}

fr.close();

} catch (IOException e1) {

e1.getStackTrace();

}

}

}

}

// 保存文件

private class SaveActionListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

flag = true;

FileWriter writer;

try {

writer = new FileWriter("未命名文件.txt");

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

writer.close();

} catch (IOException e1) {

e1.printStackTrace();

}

}

}

private class NewFileListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

new MyNote();

}

}

public static void main(String[] args) {

new MyNote();

}

}

怎么查看安卓的源代码？或者安卓应用软件的源代码？

Android代码就是java代码,如果你只需要看代码不需要运行的话,在src目录的子目录下面找到*.java文件,然后用记事本打开即可,资源文件在res目录下.如果是要运行Andorid代码的话,就需要下载Eclipse以及Android的SDK和ADT插件了.

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());

}

}

}

简易记事本代码

'以下是读记事本代码，读取后的数据存储在数组hs()中：

Dim i As Long, hs() As String

i = 0

ReDim hs(0)

Open App.Path "\1.txt" For Input As #1

Do While Not EOF(1)

ReDim Preserve hs(i)

Line Input #1, hs(i)

i = i + 1

Loop

Close #1

'以下是写记事本代码：

dim filename as string

filename = "这是第一行" chr(13) chr(10) "这是第二行" chr(13) chr(10) "这是第三行" chr(13) chr(10)

Open App.Path "\2.txt" For Output As #1

Seek #1, 1

Print #1, filename

Close #1

求简单的java计算器或记事本源代码，需要详细的注释，万分感激。麻烦帮忙发我邮箱1085374312@qq.com。谢谢

java计算器:

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class Calculator{

JButton b1;

JButton b2;

JButton plus;

JButton cancel;

TextField text;

public Calculator(){

JFrame f=new JFrame();

JButton b1=new JButton("1");

JButton b2=new JButton("2");

JButton plus=new JButton("plus");

JButton cancel=new JButton("cancel");

TextField text=new TextField(40);

text.setEditable(true);

f.add(text);

f.add(b1);

f.add(b2);

f.add(plus);

f.add(cancel);

f.setLayout(new FlowLayout());

f.setBackground(Color.red);

f.setVisible(true);

f.setSize(300,240);

b1.addActionListener(this);

b2.addActionListener(this);

plus.addActionListener(this);

cancel.addActionListener(this);

f.addWindowListener(new WinClose());

}

public void actionPerformed(ActionEvent e){

if (e.getSource()==cancel)

text.setText("");

else

text.setText(text.getText()+e.getActionCommand());

}

public static void main(String[] args) {

new Calculator();

}

}

class WinClose implements WindowListener{

public void WinClose(WindowEvent e){

System.exit(0);

}

public void windowOpened(WindowEvent e){}

public void windowActivated(WindowEvent e){}

public void windowDeactivated(WindowEvent e){}

public void Closed(WindowEvent e){}

public void Iconified(WindowEvent e){}

public void Deiconified(WindowEvent e){}

}

java记事本：

package abc;

import java.awt.*;

import java.awt.datatransfer.Clipboard;

import java.awt.datatransfer.DataFlavor;

import java.awt.datatransfer.StringSelection;

import java.awt.datatransfer.Transferable;

import java.awt.datatransfer.UnsupportedFlavorException;

import java.awt.event.*;

import java.io.*;

import javax.swing.*;

public class NoteBook implements ActionListener {

JFrame jFrame;

FileDialog f_SaveAs, f_Load;

MenuBar menubar;

Menu menu1, menu2, menu3, menu4;

MenuItem menuItemNew, menuItemOpen, menuItemSave, menuItemExit,

menuItemHelp;

MenuItem menuItemCopy, menuItemCut, menuItemPast;

MenuItem meunItemBold, menuItemPlain, menuItemItalic;

Clipboard clipboard = null;

FileDialog f_save;

FileDialog f_load;

TextArea text;

BufferedReader br;

FileReader fr;

BufferedWriter bw;

FileWriter fw;

public NoteBook() {

Dimension scrnsize = Toolkit.getDefaultToolkit().getScreenSize();

clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();

jFrame = new JFrame("我的记事本");

jFrame.setSize(300, 300);

jFrame.setLocation(scrnsize.width / 2 - jFrame.getWidth() / 2,

scrnsize.height / 2 - jFrame.getHeight() / 2);

jFrame.setVisible(true);

menubar = new MenuBar();

menu1 = new Menu("文件");

menu2 = new Menu("编辑");

menu3 = new Menu("字体");

menu4 = new Menu("帮助");

menuItemNew = new MenuItem("新建");

menuItemOpen = new MenuItem("打开");

menuItemSave = new MenuItem("另存为");

menuItemExit = new MenuItem("退出");

menuItemCopy = new MenuItem("复制");

menuItemCut = new MenuItem("剪切");

menuItemPast = new MenuItem("粘贴");

menuItemItalic = new MenuItem("斜体");

menuItemPlain = new MenuItem("正常");

meunItemBold = new MenuItem("粗体");

menuItemHelp = new MenuItem("帮助");

text = new TextArea("", 10, 10, TextArea.SCROLLBARS_VERTICAL_ONLY);

f_SaveAs = new FileDialog(jFrame, "保存文件对话框", FileDialog.SAVE);

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

menu1.add(menuItemNew);

menu1.add(menuItemOpen);

menu1.add(menuItemSave);

menu1.addSeparator();

menu1.add(menuItemExit);

menu2.add(menuItemCopy);

menu2.add(menuItemCut);

menu2.add(menuItemPast);

menu3.add(menuItemPlain);

menu3.add(menuItemItalic);

menu3.add(meunItemBold);

jFrame.setMenuBar(menubar);

menubar.add(menu1);

menubar.add(menu2);

menubar.add(menu3);

menubar.setHelpMenu(menu4);

menu4.add(menuItemHelp);

jFrame.add(text, BorderLayout.CENTER);

menuItemNew.setShortcut(new MenuShortcut(KeyEvent.VK_N));

menuItemOpen.setShortcut(new MenuShortcut(KeyEvent.VK_O));

menuItemSave.setShortcut(new MenuShortcut(KeyEvent.VK_S));

menuItemExit.setShortcut(new MenuShortcut(KeyEvent.VK_E));

menuItemCopy.setShortcut(new MenuShortcut(KeyEvent.VK_C));

menuItemCut.setShortcut(new MenuShortcut(KeyEvent.VK_X));

menuItemPast.setShortcut(new MenuShortcut(KeyEvent.VK_V));

f_Load.addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent arg0) {

// TODO Auto-generated method stub

f_Load.setVisible(false);

}

});

f_SaveAs.addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent arg0) {

// TODO Auto-generated method stub

f_SaveAs.setVisible(false);

}

});

jFrame.addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent arg0) {

// TODO Auto-generated method stub

System.exit(0);

}

});

menuItemNew.addActionListener(this);

menuItemOpen.addActionListener(this);

menuItemSave.addActionListener(this);

menuItemExit.addActionListener(this);

menuItemCopy.addActionListener(this);

menuItemCut.addActionListener(this);

menuItemPast.addActionListener(this);

menuItemItalic.addActionListener(this);

menuItemPlain.addActionListener(this);

meunItemBold.addActionListener(this);

menuItemHelp.addActionListener(this);

}

public void actionPerformed(ActionEvent e) {

if (e.getSource().equals(menuItemNew)) {

newo();

}

if (e.getSource().equals(menuItemOpen)) {

open();

}

if (e.getSource().equals(menuItemSave)) {

save();

}

if (e.getSource().equals(menuItemExit)) {

exit();

}

if (e.getSource().equals(menuItemCopy)) {

copy();

}

if (e.getSource().equals(menuItemCut)) {

cut();

}

if (e.getSource().equals(menuItemPast)) {

paste();

}

if (e.getSource().equals(menuItemItalic)) {

italic();

}

if (e.getSource().equals(menuItemPlain)) {

plain();

}

if (e.getSource().equals(meunItemBold)) {

bold();

}

if (e.getSource().equals(menuItemHelp))

help();

}

public void newo() {

text.setText("");

}

public void open() {

f_Load.setVisible(true);

text.setText(null);

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

String s;

try {

File file = new File(f_Load.getDirectory(), f_Load.getFile());

fr = new FileReader(file);

br = new BufferedReader(fr);

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

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

}

fr.close();

br.close();

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

public void save() {

f_SaveAs.setVisible(true);

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

try {

File file = new File(f_SaveAs.getDirectory(), f_SaveAs

.getFile());

fw = new FileWriter(file);

bw = new BufferedWriter(fw);

bw.write(text.getText(), 0, (text.getText()).length());

bw.flush();

bw.close();

fw.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

public void exit() {

System.exit(0);

}

public void copy() {

String temp = text.getSelectedText();

StringSelection selectText = new StringSelection(temp);

clipboard.setContents(selectText, null);

}

public void cut() {

String temp = text.getSelectedText();

StringSelection selectText = new StringSelection(temp);

clipboard.setContents(selectText, null);

int start = text.getSelectionStart();

int end = text.getSelectionEnd();

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

}

public void paste() {

Transferable content = clipboard.getContents(this);

DataFlavor flaver = DataFlavor.stringFlavor;

if (content.isDataFlavorSupported(flaver)) {

try {

String temp = (String) content.getTransferData(flaver);

text.append(temp);

} catch (UnsupportedFlavorException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

public void italic() {

text.setFont(new Font("宋体", Font.ITALIC, 12));

}

public void plain() {

text.setFont(new Font("宋体", Font.PLAIN, 12));

}

public void bold() {

text.setFont(new Font("宋体", Font.BOLD, 12));

}

public void help() {

JOptionPane jp = new JOptionPane();

jp.showMessageDialog(null, "@copyRight:何庆国");

}

public static void main(String[] args) {

// TODO Auto-generated method stub

new NoteBook();

}

}

求一个用JAVA写的简单的记事本源代码程序

import java.awt.*;

import java.awt.event.*;

import java.io.*;

import java.awt.datatransfer.*;

class MyMenuBar extends MenuBar{

public MyMenuBar(Frame parent){

parent.setMenuBar(this);

}

public void addMenus(String [] menus){

for(int i=0;imenus.length;i++)

add(new Menu(menus[i]));

}

public void addMenuItems(int menuNumber,String[] items){

for(int i=0;iitems.length;i++){

if(items[i]!=null)

getMenu(menuNumber).add(new MenuItem(items[i]));

else getMenu(menuNumber).addSeparator();

}

}

public void addActionListener(ActionListener al){

for(int i=0;igetMenuCount();i++)

for(int j=0;jgetMenu(i).getItemCount();j++)

getMenu(i).getItem(j).addActionListener(al);

}

}

class MyFile{

private FileDialog fDlg;

public MyFile(Frame parent){

fDlg=new FileDialog(parent,"",FileDialog.LOAD);

}

private String getPath(){

return fDlg.getDirectory()+"\\"+fDlg.getFile();

}

public String getData() throws IOException{

fDlg.setTitle("打开");

fDlg.setMode(FileDialog.LOAD);

fDlg.setVisible(true);

BufferedReader br=new BufferedReader(new FileReader(getPath()));

StringBuffer sb=new StringBuffer();

String aline;

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

sb.append(aline+'\n');

br.close();

return sb.toString();

}

public void setData(String data) throws IOException{

fDlg.setTitle("保存");

fDlg.setMode(FileDialog.SAVE);

fDlg.setVisible(true);

BufferedWriter bw=new BufferedWriter(new FileWriter(getPath()));

bw.write(data);

bw.close();

}

}

class MyClipboard{

private Clipboard cb;

public MyClipboard(){

cb=Toolkit.getDefaultToolkit().getSystemClipboard();

}

public void setData(String data){

cb.setContents(new StringSelection(data),null);

}

public String getData(){

Transferable content=cb.getContents(null);

try{

return (String) content.getTransferData(DataFlavor.stringFlavor);

//DataFlavor.stringFlavor会将剪贴板中的字符串转换成Unicode码形式的String对象。

//DataFlavor类是与存储在剪贴板上的数据的形式有关的类。

}catch(Exception ue){}

return null;

}

}

class MyFindDialog extends Dialog implements ActionListener{

private Label lFind=new Label("查找字符串");

private Label lReplace=new Label("替换字符串");

private TextField tFind=new TextField(10);

private TextField tReplace=new TextField(10);

private Button bFind=new Button("查找");

private Button bReplace=new Button("替换");

private TextArea ta;

public MyFindDialog(Frame owner,TextArea ta){

super(owner,"查找",false);

this.ta=ta;

setLayout(null);

lFind.setBounds(10,30,80,20);

lReplace.setBounds(10,70,80,20);

tFind.setBounds(90,30,90,20);

tReplace.setBounds(90,70,90,20);

bFind.setBounds(190,30,80,20);

bReplace.setBounds(190,70,80,20);

add(lFind);

add(tFind);

add(bFind);

add(lReplace);

add(tReplace);

add(bReplace);

setResizable(false);

bFind.addActionListener(this);

bReplace.addActionListener(this);

addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

MyFindDialog.this.dispose();

}

});

}//构造函数结束

public void showFind(){

setTitle("查找");

setSize(280,60);

setVisible(true);

}

public void showReplace(){

setTitle("查找替换");

setSize(280,110);

setVisible(true);

}

private void find(){

String text=ta.getText();

String str=tFind.getText();

int end=text.length();

int len=str.length();

int start=ta.getSelectionEnd();

if(start==end) start=0;

for(;start=end-len;start++){

if(text.substring(start,start+len).equals(str)){

ta.setSelectionStart(start);

ta.setSelectionEnd(start+len);

return;

}

}

//若找不到待查字符串，则将光标置于末尾

ta.setSelectionStart(end);

ta.setSelectionEnd(end);

}

public Button getBFind() {

return bFind;

}

private void replace(){

String str=tReplace.getText();

if(ta.getSelectedText().equals(tFind.getText()))

ta.replaceRange(str,ta.getSelectionStart(),ta.getSelectionEnd());

else find();

}

public void actionPerformed(ActionEvent e) {

if(e.getSource()==bFind)

find();

else if(e.getSource()==bReplace)

replace();

}

}

public class MyMemo extends Frame implements ActionListener{

private TextArea editor=new TextArea(); //可编辑的TextArea

private MyFile mf=new MyFile(this);//MyFile对象

private MyClipboard cb=new MyClipboard();

private MyFindDialog findDlg=new MyFindDialog(this,editor);

public MyMemo(String title){ //构造函数

super(title);

MyMenuBar mb=new MyMenuBar(this);

//添加需要的菜单及菜单项

mb.addMenus(new String[]{"文件","编辑","查找","帮助"});

mb.addMenuItems(0,new String[]{"新建","打开","保存",null,"全选"});

mb.addMenuItems(1,new String[]{"剪贴","复制","粘贴","清除",null,"全选"});

mb.addMenuItems(2,new String[]{"查找",null,"查找替换"});

mb.addMenuItems(3,new String[]{"我的记事本信息"});

add(editor); //为菜单项注册动作时间监听器

mb.addActionListener(this);

addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

MyMemo.this.dispose();

}

}); //分号不能忘了

} //构造函数完

public void actionPerformed(ActionEvent e){

String selected=e.getActionCommand(); //获取菜单项标题

if(selected.equals("新建"))

editor.setText("");

else if(selected.equals("打开")){

try{

editor.setText(mf.getData());

}catch(IOException ie){}

}

else if(selected.equals("保存")){

try{

mf.setData(editor.getText());

}catch(IOException ie){}

}

else if(selected.equals("退出")){

dispose();

}

else if(selected.equals("剪贴")){

//将选中的字符串复制到剪贴板中并清除字符串

cb.setData(editor.getSelectedText());

editor.replaceRange("",editor.getSelectionStart(),editor.getSelectionEnd());

}

else if(selected.equals("复制")){

cb.setData(editor.getSelectedText());

}

else if(selected.equals("粘贴")){

String str=cb.getData();

editor.replaceRange(str,editor.getSelectionStart(),editor.getSelectionEnd());

//粘贴在光标位置

}

else if(selected.equals("清除")){

editor.replaceRange("",editor.getSelectionStart(),editor.getSelectionEnd());

}

else if(selected.equals("全选")){

editor.setSelectionStart(0);

editor.setSelectionEnd(editor.getText().length());

}

else if(selected.equals("查找")){

findDlg.showFind();

}

else if(selected.equals("查找替换")){

findDlg.showReplace();

}

}

public static void main(String[] args){

MyMemo memo=new MyMemo("记事本");

memo.setSize(650,450);

memo.setVisible(true);

}

}

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