记事本程序源代码汇总.docx
- 文档编号:23157914
- 上传时间:2023-05-08
- 格式:DOCX
- 页数:9
- 大小:15.28KB
记事本程序源代码汇总.docx
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记事本程序源代码汇总
import java.awt.event.*;
import java.awt.*;
import java.io.*;
import java.lang.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";} }
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