notepad.java

用java语言制作的来实现记事本的功能。

import java.awt.*; 
import javax.swing.*; 
import java.awt.event.*; 
import javax.swing.event.*; 
import java.util.*; //Date needed 
import java.io.PrintWriter; 
public class NotePad extends JFrame 
{ 
JTextArea jta; 
class newl implements ActionListener 
{ 
public void actionPerformed(ActionEvent e) 
{ 
jta.setText(""); 
} 
} 

class openl implements ActionListener 
{ public void actionPerformed(ActionEvent e) 
{ 
JFileChooser jf=new JFileChooser(); 
jf.showOpenDialog(NotePad.this); 

} 

} 
//保存文件的监听 
class savel implements ActionListener 
{ 
public void actionPerformed(ActionEvent e) 
{ 
JFileChooser jf = new JFileChooser(); 
jf.showSaveDialog(NotePad.this); 

} 
} 
//打印的监听 ? 
class printl implements ActionListener 
{ 
public void actionPerformed(ActionEvent e) 
{ 
// PrintWriter p = new PrintWriter(NotePad.this); 
} 
} 
//退出记事本的监听 
class exitl implements ActionListener 
{ 
public void actionPerformed(ActionEvent e) 
{ 
System.exit(0);//退出 
} 
} 

//拷贝的监听 
class copyl implements ActionListener 
{ 
public void actionPerformed(ActionEvent e) 
{ 
jta.copy(); 
} 
} 

//粘贴的监听 
class pastel implements ActionListener 
{ 
public void actionPerformed(ActionEvent e) 
{ 
jta.paste(); 
} 
} 
//剪切的监听 
class cutl implements ActionListener 
{ 
public void actionPerformed(ActionEvent e) 
{ 
jta.cut(); 
} 
} 
//查找的监听 

//添加日期的监听 
class datel implements ActionListener 
{ 
public void actionPerformed(ActionEvent e) 
{ 
Date d=new Date(); 
jta.append(d.toString()); 
} 
} 


//构造函数 
public NotePad() 
{ 
jta=new JTextArea("",24,40); 
JScrollPane jsp=new JScrollPane(jta); 
JMenuBar jmb=new JMenuBar(); 
JMenu mFile=new JMenu("File"); 
JMenu mEdit=new JMenu("Edit"); 

JMenuItem mNew=new JMenuItem("New",KeyEvent.VK_N); 
mNew.addActionListener(new newl()); 
mFile.add(mNew); 

JMenuItem mOpen=new JMenuItem("Open",KeyEvent.VK_O); 
mOpen.addActionListener(new openl()); 
mFile.add(mOpen); 

JMenuItem mSave=new JMenuItem("Save"); 
mSave.addActionListener(new savel()); 
mFile.add(mSave); 

mFile.addSeparator(); //添加分割线 

JMenuItem mPrint = new JMenuItem("Print"); 
mPrint.addActionListener(new printl()); 
mFile.add(mPrint); 

mFile.addSeparator(); //添加分割线 

JMenuItem mExit=new JMenuItem("Exit"); 
mExit.addActionListener(new exitl()); 
mFile.add(mExit); 
mFile.setMnemonic(KeyEvent.VK_F); 

//编辑菜单的子菜单的处理 
JMenuItem jmi; 
jmi=new JMenuItem("Copy"); 
jmi.addActionListener(new copyl()); 
mEdit.add(jmi); 

jmi=new JMenuItem("Cut"); 
jmi.addActionListener(new cutl()); 
mEdit.add(jmi); 

jmi=new JMenuItem("Paste"); 
jmi.addActionListener(new pastel()); 
mEdit.add(jmi); 

mEdit.addSeparator(); //添加分割线 

jmi=new JMenuItem("Find"); 

mEdit.add(jmi); 

jmi=new JMenuItem("FindNext"); 
mEdit.add(jmi); 
mEdit.addSeparator(); 
jmi=new JMenuItem("Select All"); 
mEdit.add(jmi); 
jmi=new JMenuItem("Date/Time"); 
jmi.addActionListener(new datel()); 
mEdit.add(jmi); 

jmb.add(mFile); 
jmb.add(mEdit); 

this.setJMenuBar(jmb); 

this.getContentPane().add(jsp); 
this.setSize(200,200); 
this.setVisible(true); 
} 
//主函数，程序入口点 
public static void main(String s[]) 
{ 
new NotePad(); 
} 

}