java仿windows记事本小程序
本文实例为大家分享了java仿windows记事本小程序的具体代码，供大家参考，具体内容如下
importjava.awt.CheckboxMenuItem;
importjava.awt.Font;
importjava.awt.Frame;
importjava.awt.Menu;
importjava.awt.MenuBar;
importjava.awt.MenuItem;
importjava.awt.MenuShortcut;
importjava.awt.TextArea;
importjava.awt.Toolkit;
importjava.awt.event.ActionEvent;
importjava.awt.event.ActionListener;
importjava.awt.event.ItemEvent;
importjava.awt.event.ItemListener;
importjava.awt.event.KeyEvent;
importjava.awt.event.WindowAdapter;
importjava.awt.event.WindowEvent;
importjava.awt.peer.ButtonPeer;
importjava.io.BufferedReader;
importjava.io.File;
importjava.io.FileInputStream;
importjava.io.FileNotFoundException;
importjava.io.FileOutputStream;
importjava.io.IOException;
importjava.io.InputStreamReader;
importjava.io.OutputStream;
importjava.io.StringReader;
importjava.io.StringWriter;
importjava.sql.Date;
importjava.text.SimpleDateFormat;
importjavax.print.DocFlavor.STRING;
importjavax.script.ScriptException;
importjavax.swing.BorderFactory;
importjavax.swing.BoxLayout;
importjavax.swing.ButtonGroup;
importjavax.swing.JFileChooser;
importjavax.swing.JFrame;
importjavax.swing.JOptionPane;
importjavax.swing.JPanel;
importjavax.swing.JRadioButton;
importjavax.swing.JScrollBar;
importjavax.swing.JScrollPane;
importjavax.swing.JTextArea;
importjavax.swing.border.EtchedBorder;
importjavax.swing.border.TitledBorder;
importjavax.swing.event.AncestorListener;
importjavax.swing.filechooser.FileNameExtensionFilter;
publicclassCrazy_15_4{
privateJFramef=newJFrame("记事本");
//成员变量
staticStringshearPlate=null;
staticbooleanisAutoWrap=true;//是否自动换行
JTextAreata=newJTextArea(20,60);
JScrollPanejsp=newJScrollPane(ta);
privateMenuBarmb=newMenuBar();
publicStringfontStr="宋体";
publicStringshapeStr="0";
publicStringsizeStr="20";
Fontfont=newFont(fontStr,Integer.parseInt(shapeStr),Integer.parseInt(sizeStr));
//menu
Menufile=newMenu("文件");
Menuedit=newMenu("编辑");
Menuformat=newMenu("格式");
//menuitem
MenuItemnewItem=newMenuItem("新建");
MenuItemopenItem=newMenuItem("打开");
MenuItemsaveItem=newMenuItem("保存");
MenuItemsaveAsItem=newMenuItem("另存为");
MenuItemcutItem=newMenuItem("剪切");
MenuItemcopyItem=newMenuItem("复制");
MenuItempasteItem=newMenuItem("粘贴");
CheckboxMenuItemautoWrap=newCheckboxMenuItem("自动换行",isAutoWrap);
MenuItemFontItem=newMenuItem("字体");
//使用“ctrl+x”快捷键
MenuItemexitIitem=newMenuItem("退出",newMenuShortcut(KeyEvent.VK_X));
publicvoidinit(){
//带滚动条的文本域
ta.setLineWrap(isAutoWrap);
jsp.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
jsp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
file.add(newItem);
file.add(openItem);
file.add(saveItem);
file.add(saveAsItem);
edit.add(cutItem);
edit.add(copyItem);
edit.add(pasteItem);
format.add(autoWrap);
format.add(FontItem);
mb.add(file);
mb.add(edit);
mb.add(format);
f.setMenuBar(mb);
f.addWindowListener(newWindowAdapter(){
publicvoidwindowClosing(WindowEventwe){
if(!(ta.getText().equals(""))){
Object[]options={"保存","不保存","取消"};
inta=JOptionPane.showOptionDialog(null,"是否将更改保存到H:/Programing/无标题.txt","记事本",JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE,null,options,options[0]);
if(a==JOptionPane.OK_OPTION){
if(save()){
System.exit(0);
}
}elseif(a==JOptionPane.NO_OPTION){
System.exit(0);
}
}else{
System.exit(0);
}
}
});
newItem.addActionListener(newnewListener());
openItem.addActionListener(newopenListener());
saveItem.addActionListener(newsaveListener());
saveAsItem.addActionListener(newsaveAsListener());
cutItem.addActionListener(newcutAsListener());
copyItem.addActionListener(newcopyAsListener());
pasteItem.addActionListener(newpasteAsListener());
autoWrap.addItemListener(newautoWrapAsListener());
FontItem.addActionListener(newfontListener());
ta.setFont(font);
//使文本框处在屏幕中间
intwidth=Toolkit.getDefaultToolkit().getScreenSize().width;
intheight=Toolkit.getDefaultToolkit().getScreenSize().height;
f.add(jsp);
f.pack();
f.setLocation(width/2-f.getWidth()/2,height/2-f.getHeight()/2);
f.setVisible(true);
//避免关闭对话框直接关闭文本文件
f.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
}
publicstaticvoidmain(String[]args){
newCrazy_15_4().init();
}
//是否保存
publicvoidsaveOrNot(){
if(!(ta.getText().equals(""))){
Object[]options={"保存","不保存","取消"};
inta=JOptionPane.showOptionDialog(null,"是否将更改保存到H:/Programing/无标题.txt","记事本",JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE,null,options,options[0]);
if(a==JOptionPane.OK_OPTION){
save();
}
}
}
//保存文本文件
publicbooleansave(){
booleanisSaved=false;
JFileChooserjf=newJFileChooser();
FileNameExtensionFilterfilter=newFileNameExtensionFilter("txt","txt");
jf.setAcceptAllFileFilterUsed(false);
jf.setFileFilter(filter);
intvalue=jf.showSaveDialog(null);
if(value==JFileChooser.APPROVE_OPTION){
Filefile=jf.getSelectedFile();
Stringstr=ta.getText();
byte[]buf=str.getBytes();
try{
OutputStreamos=newFileOutputStream(file);
os.write(buf);
os.flush();
os.close();
isSaved=true;
}catch(IOExceptione){
e.printStackTrace();
}
}
returnisSaved;
}
//新建监听器
classnewListenerimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
if(!(ta.getText().equals(""))){
Object[]options={"保存","不保存","取消"};
inta=JOptionPane.showOptionDialog(null,"是否将更改保存到H:/Programing/无标题.txt","记事本",JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE,null,options,options[0]);
if(a==JOptionPane.OK_OPTION){
if(save()){
ta.setText("");
}
}elseif(a==JOptionPane.NO_OPTION){
ta.setText("");
}
}
}
}
//打开监听器，从硬盘目录打开文本文件
classopenListenerimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
JFileChooserjf=newJFileChooser();
FileNameExtensionFilterfilter=newFileNameExtensionFilter("txt","txt");
jf.setAcceptAllFileFilterUsed(false);
jf.setFileFilter(filter);
intvalue=jf.showOpenDialog(null);
if(value==JFileChooser.APPROVE_OPTION){
Filefile=jf.getSelectedFile();
try{
Stringencoding="GBK";//考虑编码格式
InputStreamReaderisr=newInputStreamReader(newFileInputStream(file),encoding);
BufferedReaderbr=newBufferedReader(isr);
Stringstr=null;
while((str=br.readLine())!=null){
ta.append(str);
}
}catch(FileNotFoundExceptione1){
//TODOAuto-generatedcatchblock
e1.printStackTrace();
}catch(IOExceptione1){
//TODOAuto-generatedcatchblock
e1.printStackTrace();
}
}
}
}
//保存监听器，以电脑时间命名
classsaveListenerimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
Stringname=null;
SimpleDateFormatdf=newSimpleDateFormat("yyyy-MM-ddHH-mm-ss");
name=df.format(System.currentTimeMillis());
Filefile=newFile("H:/Programing/workspace/"+name+".txt");
Stringstr=ta.getText();
byte[]buf=str.getBytes();
if(!str.equals("")){
try{
OutputStreamos=newFileOutputStream(file);
os.write(buf);
os.flush();
os.close();
}catch(IOExceptione2){
e2.printStackTrace();
}
}
}
}
//另存为监听器
classsaveAsListenerimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
save();
}
}
//剪切监听器
classcutAsListenerimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
shearPlate=ta.getSelectedText();
intstartPosi=ta.getSelectionStart();
intendPosi=ta.getSelectionEnd();
StringBuffersb=newStringBuffer(ta.getText());
sb.delete(startPosi,endPosi);
ta.setText(sb.toString());
}
}
//复制监听器
classcopyAsListenerimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
shearPlate=ta.getSelectedText();
}
}
//粘贴监听器
classpasteAsListenerimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
intposition=ta.getCaretPosition();
StringBuildersb=newStringBuilder(ta.getText());
sb.insert(position,shearPlate);
ta.setText(sb.toString());
ta.setCaretPosition(position+shearPlate.length());
}
}
//自动换行监听器
classautoWrapAsListenerimplementsItemListener{
@Override
publicvoiditemStateChanged(ItemEvente){
if(autoWrap.getState()){
isAutoWrap=true;
ta.setLineWrap(isAutoWrap);
jsp.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
jsp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
}else{
isAutoWrap=false;
ta.setLineWrap(isAutoWrap);
jsp.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
jsp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_NEVER);
}
}
}
//字体监听器
classfontListenerimplementsActionListener{
JFramejf=newJFrame("字体");
JPaneljp=newJPanel();
ButtonPanelfontButton=newButtonPanel("字体",newString[]{"宋体","黑体","楷体","吴祎晗1.0"});
ButtonPanelshapeButton=newButtonPanel("字形",newString[]{"常规","粗体","斜体","粗体&斜体"});
ButtonPanelsizeButton=newButtonPanel("字号",newString[]{"12","16","20","24","26"});
publicvoidactionPerformed(ActionEvente){
jp.setBorder(newTitledBorder(newEtchedBorder(),"字体选择",TitledBorder.CENTER,TitledBorder.TOP));
jp.add(fontButton);
jp.add(shapeButton);
jp.add(sizeButton);
jf.add(jp);
jf.pack();
jf.setLocationRelativeTo(f);
jf.setVisible(true);
jf.addWindowListener(newWindowAdapter(){
publicvoidwindowClosing(WindowEvente){
fontStr=fontButton.getSelec();
sizeStr=sizeButton.getSelec();
font=newFont(fontStr,shapeVal(shapeButton.getSelec()),Integer.parseInt(sizeStr));
ta.setFont(font);
}
});
}
publicintshapeVal(Stringstr){
inta=0;
switch(str){
case"常规":
a=0;
break;
case"粗体":
a=1;
break;
case"斜体":
a=2;
break;
case"粗体&斜体":
a=3;
break;
}
returna;
}
}
}
//定义一个JPanel类扩展类，该类的对象包含多个纵向排列的
//JRadioButton控件，且panel扩展类可以指定一个字符串作为TitledBorder
classButtonPanelextendsJPanel{
privateButtonGroupgroup;
publicButtonPanel(Stringtitle,String[]options){
setBorder(BorderFactory.createTitledBorder(BorderFactory.createEtchedBorder(),title));
setLayout(newBoxLayout(this,BoxLayout.Y_AXIS));
group=newButtonGroup();
for(inti=0;options!=null&&i
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