下载JDK，并安装成功，CMD测试Java环境安装成功。出现如下提示则Java环境安装成功
打开mycelipse进入主界面，点击左上角file--new---java project,新建一个Java项目，项目名字任意取，这里我取名为note--然后点击完成，创建Java项目
然后右键项目下的src--new---package,新建一个包，包名我定为notetest，然后点击完成
然后右键我们建立好的包notetest--new--class，包名为Note,点击完成
首先我们想导入工程所需要的包，以便编写程序时进行调用
package notepad
import java.awt.*
import java.awt.event.ActionEvent
import java.awt.event.ActionListener
import java.awt.event.WindowAdapter
import java.awt.event.WindowEvent
import java.io.BufferedReader
import java.io.BufferedWriter
首先定义好编写程序时变量，我们设为成员变量方便以后调用
public class Notepad{
//屏幕分辨率
int width = Toolkit.getDefaultToolkit().getScreenSize().width
int height = Toolkit.getDefaultToolkit().getScreenSize().height
//窗体
private Frame frm
//显示内容多行文本
private TextArea notetext
//记事本菜单
private MenuBar mb
//菜单
private Menu m
//菜单项
private MenuItem open,save
为程序创建组件--Frame--菜单栏目--文本框TextArea
public Notepad(){init()}
private void init(){
frm = new Frame("模拟记事本")
//设置菜单
mb = new MenuBar()
m = new Menu("文件")
//显示文件的地方
notetext = new TextArea()
notetext.setBounds(30, 50, 750, 500)
frm.add(notetext)
myEvent()
为控件和按钮添加监听事件
private void myEvent() {
//打开菜单的事件处理
open.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
//判断路径和文件名是否为空 如果为空结束程序
if(dir == null || name == null)
//如果不为空讲路径名和文件名封装到File对象里
file = new File(dir,name)
//使用字符缓冲读取文件
BufferedReader bfr = null
try {
bfr = new BufferedReader(new FileReader(file))
})
save.addActionListener(new ActionListener(){
//获取路径和文件名
String dir =fd.getDirectory()
String name = fd.getFile()
//如果不为空讲路径名和文件名封装到File对象里
file = new File(dir,name)
}
BufferedWriter bfr= null
}
})
}
}
然后创建主方法，开始测试程序，新建一个NoteDemo类
package notepad
public class NoteDemo {
public static void main(String[] args) {
new Notepad()
}
}
a.awt.event.*import javax.swing.JOptionPane
/**
*功能：简单记事本
*2011-12-25
*/
public class SimpleNotepad implements ActionListener{
private Frame frame
private FileDialog fd_load
private FileDialog fd_save
private TextArea ta
private String file = ""
private MenuItem save
private RandomAccessFile raf
private FileChannel fci
private FileLock flock
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 n1String str=""int k=0String st1,st2
JTextArea ta=new JTextArea(50,50)
Dialog dialog,dialog1
Choice ce1,ce2,ce3
Button btn1,btn2,btn3Panel 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")
ImageIconYouImg=newImageIcon("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=0n1<=100n1++)
{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=1st1=ce1.getSelectedItem()st2=ce3.getSelectedItem()}
if (ce2.getSelectedItem().equals("斜体"))
{ k=2st1=ce1.getSelectedItem()st2=ce3.getSelectedItem()}
if (ce2.getSelectedItem().equals("常规"))
{ k=3st1=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=0n<str.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)
}
}
}
}
}
