记事本程序源代码汇总

import java.awt.event.*;

import java.awt.*;

import java.io.*;

import https://www.360docs.net/doc/b114006444.html,ng.String;

class jsb implements ActionListener

{

Dialog bb;

String strt;

int i;

FileDialog fd;

File file;

public Frame f;

public TextArea p1;

public MenuBar menubar;

public Menu menu1,menu2,menu3;

public MenuItem item1,item2,item3,item4,item5,item6,item7,item8,item9,item10; jsb(String s

{ i=0;

f=new Frame(s;

p1=new TextArea("";

f.setSize(500,500;

f.setBackground(Color.white;

f.setVisible(true;

menubar=new MenuBar(;

menu1=new Menu("文件";

menu2=new Menu("编辑";

menu3=new Menu("帮助";

item1=new MenuItem("新建";

item2=new MenuItem("打开";

item3=new MenuItem("保存";

item4=new MenuItem("另存为";

item5=new MenuItem("退出";

item6=new MenuItem("全选";

item7=new MenuItem("复制";

item8=new MenuItem("剪切";

item9=new MenuItem("粘贴";

item10=new MenuItem("关于";

f.addWindowListener(new WindowAdapter(

{

public void windowClosing(WindowEvent e {f.setVisible(false;System.exit(0;}

};

menu1.add(item1;

menu1.add(item2;

menu1.add(item3;

menu1.add(item4;

menu1.add(item5;

menu2.add(item6;

menu2.add(item7;

menu2.add(item8;

menu2.add(item9;

menu3.add(item10;

menubar.add(menu1;

menubar.add(menu2;

menubar.add(menu3;

f.setMenuBar(menubar;

item1.addActionListener(this;

item2.addActionListener(this;

item3.addActionListener(this;

item4.addActionListener(this;

item5.addActionListener(this;

item6.addActionListener(this;

item7.addActionListener(this;

item8.addActionListener(this;

item9.addActionListener(this;

item10.addActionListener(this;

f.setLayout(new GridLayout(1,1;

f.add(p1;f.pack(;

}

public void actionPerformed(ActionEvent e { String ss;

ss=p1.getText(.trim(;

if (e.getSource(==item5

{

if (i==0 &&(ss.length(!=0

{

bc(;

}

else

{

System.exit(0;

}

}

if (e.getSource(==item1

{

if (i==0&&(ss.length(!=0

{

bc(;

}

else

{

p1.setText("";i=0;f.setTitle("文件对话框"; } }

if (e.getSource(==item2

{

fd=new FileDialog(f,"打开文件",0;

fd.setVisible(true;

try{

file=new File(fd.getDirectory(,fd.getFile(;

f.setTitle(fd.getFile(+"文件对话框"; FileReader fr=new FileReader(file; BufferedReader br=new BufferedReader(fr; String line = null;

String view = "";

while((line=br.readLine(!=null

{

view += line+"\n";

}

p1.setText(view;

br.close(;

fr.close(;

}

catch(IOException expIn

{}

}

if (e.getSource(==item3

{

if (i==0

{

bc(;

}

else

{

try{

file=new File(fd.getDirectory(,fd.getFile(;

f.setTitle(fd.getFile(+"--记事本";

FileWriter fw=new FileWriter(file; BufferedWriter bw=new BufferedWriter(fw; String s =p1.getText(;

s = s.replaceAll("\n","\r\n";

bw.write(s;

bw.flush(;

bw.close(;

fw.close(;

i=1;

}

catch(IOException expOut{i=0;}

}

}

if (e.getSource(==item4

{

bc(;

}

if (e.getSource(==item10

{

bb=new Dialog(f,"关于";

Label l1=new Label("本记事本的完成感谢老师和同学的帮助!!"; bb.add(l1; bb.setSize(250,150;

bb.setBackground(Color.white;

bb.show(;

bb.addWindowListener(new WindowAdapter(

{

public void windowClosing(WindowEvent e

{bb.setVisible(false;bb.dispose(;}

};

}

if (e.getSource(==item6

{

p1.setSelectionStart(0;

p1.setSelectionEnd(p1.getText(.length(; }

if (e.getSource(==item7

{

try{

String str=p1.getSelectedText(;

if(str.length(!=0

{

strt=str;

}

}catch(Exception ex

{

}

}

if (e.getSource(==item8

{

try{

String str=p1.getSelectedText(;

if(str.length(!=0

{

p1.replaceRange("",p1.getSelectionStart(,p1.getSelectionEnd(; } }

catch(Exception ex

{

}

}

if (e.getSource(==item9

{

if(strt.length(>0

{

p1.insert(strt,p1.getCaretPosition(;

}

}

}

public void bc(

{

fd=new FileDialog(f,"保存文件",1;

fd.setVisible(true;

try{

file=new File(fd.getDirectory(,fd.getFile(;

f.setTitle(fd.getFile(+"--记事本"; FileWriter fw=new FileWriter(file; BufferedWriter bw=new BufferedWriter(fw; String s =p1.getText(;

s = s.replaceAll("\n","\r\n";

bw.write(s;

bw.flush(;

bw.close(;

fw.close(;

i=1;

}

catch(IOException expOut{}

} } public class EX0101 { public static void main(String args[] {jsb dd=new jsb("我的记事本";} }