记事本java代码_java实现Windows记事本(示例代码)
import java.awt.*;import javax.swing.*;import javax.swing.event.*; //導入菜單
importjavax.swing.filechooser.FileNameExtensionFilter;import java.util.Date; //獲取系統的時間
import java.text.SimpleDateFormat; //控制系統的時間格式
import java.awt.event.*;import java.io.*;import java.util.regex.*;public class JF_Notpad extends JFrame implementsActionListener,WindowListener{//menuBar
privateJMenuBar mb;privateJMenu file,edit,format,view,help;//menuToolBar
privateJToolBar tool;private static intBUTTONWIDTH,BUTTONHEIGHT;privateJButton create,unfold,copy,cut,paste,pasteShortcut,delete;//File//JMenu下還可以有二級菜單
privateJMenu newNot;//JMenuItem不可以有其他菜單
privateJMenuItem notpad,model,open,save,saveAs,pageSet,print,exit;//Edit
privateJMenuItem undoE,cutE,copyE,pasteE,deleteE,findE,findNextE,replaceE,goToE,selectAllE,timeDateE;//Format
privateJMenuItem wordWrap,font;//View
privateJMenuItem statusBar;//Help
privateJMenuItem viewHelp,about;//leftSpace
privateJPanel leftSpace;//TextArea
privateJTextArea content;privateJScrollPane scroll;//openUrl,saveUrl
private static String openUrl="E:/notpad.txt"; //保存之前打開文件的路徑
private static String saveUrl="E:/notpad.txt"; //保存之前保存文件的路徑
private boolean saved=false; //判斷文件是否保存過//contentFont 字體
privateFont contentFont;//是否在打開保存面板后，還應該打開選擇文件面板
private boolean openFileBool=false;public static voidmain(String[] args) {
JF_Notpad not=newJF_Notpad();
}public static JButton changeIconSize(JButton button,String url,int width,intheight,String tip){
button.setBounds(0,0,width,height);
ImageIcon buttonImg=newImageIcon(url);//改變圖片的大小
Image temp=buttonImg.getImage().getScaledInstance(button.getWidth(), button.getHeight(), buttonImg.getImage().SCALE_DEFAULT);
button=new JButton(newImageIcon(temp));
button.setToolTipText(tip);//提示
returnbutton;
}public static Image changeImageSize(String url,int width,intheight){
ImageIcon Img=newImageIcon(url);//改變圖片的大小
Image temp=Img.getImage().getScaledInstance(width, height, Img.getImage().SCALE_DEFAULT);returntemp;
}
JF_Notpad(){//menubar
mb=newJMenuBar();
file=new JMenu("File(F)");
file.setMnemonic(‘F‘);
edit=new JMenu("Edit(E)");
edit.setMnemonic(‘E‘);
format=new JMenu("Format(O)");
format.setMnemonic(‘O‘);
view=new JMenu("View(V)");
view.setMnemonic(‘V‘);
help=new JMenu("Help(H)");
help.setMnemonic(‘H‘);//menuToolBar
tool=newJToolBar();
BUTTONWIDTH=22;
BUTTONHEIGHT=22;
create=newJButton();
create=JF_Notpad.changeIconSize(create, "img/notpad/news.png", BUTTONWIDTH, BUTTONWIDTH, "New");
unfold=newJButton();
unfold=JF_Notpad.changeIconSize(unfold, "img/notpad/open.png", BUTTONWIDTH, BUTTONWIDTH, "Open");
copy=newJButton();
copy=JF_Notpad.changeIconSize(copy, "img/notpad/copy.png", BUTTONWIDTH, BUTTONWIDTH, "Copy");
cut=newJButton();
cut=JF_Notpad.changeIconSize(cut, "img/notpad/cut.png", BUTTONWIDTH, BUTTONWIDTH, "Cut");
paste=newJButton();
paste=JF_Notpad.changeIconSize(unfold, "img/notpad/paste.png", BUTTONWIDTH, BUTTONWIDTH, "Paste");
pasteShortcut=newJButton();
pasteShortcut=JF_Notpad.changeIconSize(pasteShortcut, "img/notpad/pasteShortcut.png", BUTTONWIDTH, BUTTONWIDTH, "PasteShortcut");
delete=newJButton();
delete=JF_Notpad.changeIconSize(delete, "img/notpad/delete.png", BUTTONWIDTH, BUTTONWIDTH, "Delete");//menuToolBarListener
create.setActionCommand("notpad");
create.addActionListener(this);
unfold.setActionCommand("open");
unfold.addActionListener(this);
copy.setActionCommand("copyE");
copy.addActionListener(this);
cut.setActionCommand("cutE");
cut.addActionListener(this);
paste.setActionCommand("pasteE");
paste.addActionListener(this);
pasteShortcut.setActionCommand("pasteShortcut");
pasteShortcut.addActionListener(this);
delete.setActionCommand("deleteE");
delete.addActionListener(this);//file
newNot=new JMenu("New(N)");
newNot.setMnemonic(‘N‘);
ImageIcon icon=new ImageIcon(this.changeImageSize("img/notpad/logo.png", BUTTONWIDTH-5,BUTTONHEIGHT-5));
notpad=new JMenuItem("Notpad",icon);
model=new JMenuItem("Model");
icon=new ImageIcon(this.changeImageSize("img/notpad/open.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
open=new JMenuItem("Open",icon);
icon=new ImageIcon(this.changeImageSize("img/notpad/save.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
save=new JMenuItem("Save",icon);
icon=new ImageIcon(this.changeImageSize("img/notpad/saveAs.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
saveAs=new JMenuItem("Save As...",icon);
pageSet=new JMenuItem("PageSet");
print=new JMenuItem("Print");
icon=new ImageIcon(this.changeImageSize("img/notpad/exit.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
exit=new JMenuItem("Exit",icon);//FileListener
notpad.setActionCommand("notpad");
notpad.addActionListener(this);
model.setActionCommand("model");
model.addActionListener(this);
open.setActionCommand("open");
open.addActionListener(this);
save.setActionCommand("save");
save.addActionListener(this);
saveAs.setActionCommand("saveAs");
saveAs.addActionListener(this);
pageSet.setActionCommand("pageSet");
pageSet.addActionListener(this);
print.setActionCommand("print");
print.addActionListener(this);
exit.setActionCommand("exit");
exit.addActionListener(this);//Edit
undoE=new JMenuItem("Undo");
icon=new ImageIcon(this.changeImageSize("img/notpad/cut.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
cutE=new JMenuItem("Cut",icon);
icon=new ImageIcon(this.changeImageSize("img/notpad/copy.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
copyE=new JMenuItem("Copy",icon);
icon=new ImageIcon(this.changeImageSize("img/notpad/paste.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
pasteE=new JMenuItem("Paste",icon);
icon=new ImageIcon(this.changeImageSize("img/notpad/delete.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
deleteE=new JMenuItem("Delete",icon);
findE=new JMenuItem("Find...");
findNextE=new JMenuItem("Find Next");
replaceE=new JMenuItem("Replace...");
goToE=new JMenuItem("Go To..");
selectAllE=new JMenuItem("Select All");
timeDateE=new JMenuItem("Time/Data");//EditListener
undoE.setActionCommand("undoE");
undoE.addActionListener(this);
cutE.setActionCommand("cutE");
cutE.addActionListener(this);
copyE.setActionCommand("copyE");
copyE.addActionListener(this);
pasteE.setActionCommand("pasteE");
pasteE.addActionListener(this);
deleteE.setActionCommand("deleteE");
deleteE.addActionListener(this);
findE.setActionCommand("findE");
findE.addActionListener(this);
findNextE.setActionCommand("findNextE");
findNextE.addActionListener(this);
replaceE.setActionCommand("replaceE");
replaceE.addActionListener(this);
goToE.setActionCommand("goToE");
goToE.addActionListener(this);
selectAllE.setActionCommand("selectAllE");
selectAllE.addActionListener(this);
timeDateE.setActionCommand("timeDateE");
timeDateE.addActionListener(this);//Format
icon=new ImageIcon(this.changeImageSize("img/notpad/wordWrap.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
wordWrap=new JMenuItem("Word Wrap",icon);
icon=new ImageIcon(this.changeImageSize("img/notpad/font.png", BUTTONWIDTH-8, BUTTONHEIGHT-8));
font=new JMenuItem("Font...",icon);//FormatListener
wordWrap.setActionCommand("wordWrap");
wordWrap.addActionListener(this);
font.setActionCommand("font");
font.addActionListener(this);//View
statusBar=new JMenuItem("Status Bar");//ViewListener
statusBar.setActionCommand("statusBar");
statusBar.addActionListener(this);//Help
viewHelp=new JMenuItem("View Help");
icon=new ImageIcon(this.changeImageSize("img/notpad/about.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
about=new JMenuItem("About NotePad",icon);//HelpListener
viewHelp.setActionCommand("viewHelp");
viewHelp.addActionListener(this);
about.setActionCommand("about");
about.addActionListener(this);//leftSpace
leftSpace=newJPanel();//contentFont
contentFont=new Font("KaiTi",Font.PLAIN,20);//textArea
content=newJTextArea();
content.setFont(contentFont);
scroll=newJScrollPane(content);//scroll.setHorizontalScrollBar(content);//openUrl,saveUrl//openUrl="E:/notpad.txt";//saveUrl="E:/notpad.txt";//saved=false;//saveFilePanel//Save saveF=new Save("Save",this);//添加組件，從下一級開始裝
newNot.add(notpad); newNot.add(model);
file.add(newNot); file.add(open); file.add(save); file.add(saveAs); file.addSeparator(); file.add(pageSet); file.add(print); file.addSeparator(); file.add(exit);
edit.add(undoE);
edit.addSeparator();
edit.add(cutE);
edit.add(copyE);
edit.add(pasteE);
edit.add(deleteE);
edit.addSeparator();
edit.add(findE);
edit.add(findNextE);
edit.add(replaceE);
edit.add(goToE);
edit.addSeparator();
edit.add(selectAllE);
edit.add(timeDateE);
format.add(wordWrap);
format.add(font);
view.add(statusBar);
help.add(viewHelp);
help.addSeparator();
help.add(about);
mb.add(file); mb.add(edit); mb.add(format); mb.add(view); mb.add(help);
tool.add(create);
tool.add(unfold);
tool.add(copy);
tool.add(cut);
tool.add(paste);
tool.add(pasteShortcut);
tool.add(delete);this.setJMenuBar(mb);this.add(tool,BorderLayout.NORTH);this.add(leftSpace,BorderLayout.WEST);this.add(scroll);this.setTitle("Notpad");this.setIconImage(new ImageIcon("img/notpad/logo.png").getImage());this.setLocation(300,300);this.setSize(400,400);this.setDefaultCloseOperation(this.EXIT_ON_CLOSE);this.setVisible(true);
}private String origContent=null; //保存一開始的文件或者保存過的文件
private String copyContent=null;
@Overridepublic voidactionPerformed(ActionEvent e) {switch(e.getActionCommand()){case "notpad":{
System.out.println("notpad");this.isChangeFile("txt");
}break;case "model":{
System.out.println("model");this.isChangeFile("java");
}break;case "open":{
System.out.println("open");//防止第一次打開空文件時，還沒保存
if(this.origContent==null){this.saved=true;
}if(saved){this.openFilePanel();
}else{
Save saveF=new Save("Save",this);this.openFilePanel();
}
}break;case "save":{
System.out.println("save");this.saveFile();//this.setSaved(true);
}break;case "saveAs":{
System.out.println("saveAs");
String str=content.getText();//選擇保存文件的路徑
JFileChooser fileChoose=null;if(saveUrl==null){
fileChoose=newJFileChooser();
}else{
fileChoose=newJFileChooser(saveUrl);
}
FileNameExtensionFilter filter=new FileNameExtensionFilter("txt & java","java","txt"); //設置可以識別的文件
fileChoose.setFileFilter(filter);
fileChoose.setDialogTitle("Save File");
fileChoose.showSaveDialog(save);
fileChoose.setVisible(true);
File outFile=fileChoose.getSelectedFile();
saveUrl=fileChoose.getSelectedFile().getPath();
PrintStream p=null;try{
p=newPrintStream(outFile);
System.setOut(p);
System.out.print(str);
}catch(Exception a){
System.out.println("SaveAS File Error!!");
}finally{
p.close();
}
}break;case "pageSet":{
System.out.println("pageSet");
}break;case "print":{
System.out.println("print");
}break;case "exit":{
System.out.println("exit");
System.exit(-1);
}break;case "undoE":{
System.out.println("undoE");
}break;case "cutE":{
System.out.println("cutE");if(this.content.getSelectedText()!=null){this.copyContent=this.content.getSelectedText();
}this.content.replaceSelection("");
}break;case "copyE":{
System.out.println("copyE");if(this.content.getSelectedText()!=null){this.copyContent=this.content.getSelectedText();
}
}break;case "pasteE":{
System.out.println("pasteE");if(copyContent!=null){this.content.replaceRange("", content.getSelectionStart(), content.getSelectionEnd());
}this.content.insert(copyContent, this.content.getSelectionStart());
}break;case "deleteE":{
System.out.println("deleteE");this.content.replaceSelection("");
}break;case "findE":{
System.out.println("findE");
}break;case "findNextE":{
System.out.println("findNextE");
}break;case "replaceE":{
System.out.println("replaceE");
}break;case "goToE":{
System.out.println("goToE");
}break;case "selectAllE":{
System.out.println("selectAllE");this.content.selectAll();
}break;case "timeDateE":{
System.out.println("timeDateE");
SimpleDateFormat df=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//System.out.println(df.format(new Date()));
this.content.insert(df.format(newDate()), content.getSelectionStart());
}break;case "wordWrap":{
System.out.println("wordWrap");
ImageIcon icon;if(this.content.getLineWrap()){this.content.setLineWrap(false);
icon=new ImageIcon(this.changeImageSize("img/notpad/wordWrap.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));this.wordWrap.setIcon(icon);
}else{this.content.setLineWrap(true);
icon=new ImageIcon(this.changeImageSize("img/notpad/wordWrapNo.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));this.wordWrap.setIcon(icon);
}
}break;case "font":{
System.out.println("font");
FontPanel f=new FontPanel("Font",this);//this.content.setFont(new Font(f.getFontN(),f.getFontSytleN(),f.getSizeN()));
}break;case "statusBar":{
System.out.println("statusBar");
}break;case "viewHelp":{
System.out.println("viewHelp");
}break;case "about":{
System.out.println("about");
About a=new About("About","1.0","feiquan","[email?protected]","1843522xxxx","https://www.baidu.com");
}break;case "pasteShortcut":{
System.out.println("pasteShortcut");
}break;
}
}
@Overridepublic voidwindowOpened(WindowEvent e) {//TODO Auto-generated method stub
}
@Overridepublic voidwindowClosing(WindowEvent e) {//TODO Auto-generated method stub
System.out .println("彈出是否選擇保存的對話框");if(saved){
Save saveF=new Save("Save",this);
}
}
@Overridepublic voidwindowClosed(WindowEvent e) {//TODO Auto-generated method stub
}
@Overridepublic voidwindowIconified(WindowEvent e) {//TODO Auto-generated method stub
}
@Overridepublic voidwindowDeiconified(WindowEvent e) {//TODO Auto-generated method stub
}
@Overridepublic voidwindowActivated(WindowEvent e) {//TODO Auto-generated method stub
}
@Overridepublic voidwindowDeactivated(WindowEvent e) {//TODO Auto-generated method stub
}public staticString getOpenUrl() {returnopenUrl;
}public static voidsetOpenUrl(String openUrl) {
JF_Notpad.openUrl=openUrl;
}public staticString getSaveUrl() {returnsaveUrl;
}public static voidsetSaveUrl(String saveUrl) {
JF_Notpad.saveUrl=saveUrl;
}//保存文件其中包含了，判斷文件是否存在
public voidsaveFile(){
String str=this.content.getText();
System.out.println("正在保存：
"+str);//判斷文件是否存在,不存在則創建文件
File file=newFile(openUrl);if(!file.exists()){try{
file.createNewFile();
}catch(Exception a){
System.out.println("創建文件 "+file.getAbsolutePath()+" 失敗！！");
}
}
PrintStream p=null;try{
p=new PrintStream(newFile(openUrl));
System.setOut(p);
System.out.print(str);
saved=true;
}catch(Exception a){
System.out.println("Save File Error!!");
saved=false;
}finally{
p.close();
}
}//判斷文件是否修改過，并根據傳入的屬性判斷新建那個文件
public voidisChangeFile(String properties){
System.out.println("是否保存文件："+saved);//判斷文件是否修改過
if(!(this.content.getText().equals(origContent))){
saved=false;
}//如果內容為空，也視為已經保存
if(this.content.getText()==null||this.content.getText().equals(""))saved=true;
System.out.println("判斷后是否保存文件："+saved);if(saved){switch(properties){case "txt":{this.content.setText("");this.setTitle("notpad");
origContent="";
}break;case "java":{this.setTitle("notpad");
String str="public class Notpad {
public static void main (String[] ages) {
}
}";this.content.setText(str);
origContent=str;
}break;
}
}else{
System.out .println("彈出是否選擇保存的對話框");
Save saveF=new Save("Save",this);
}
System.out.println("經過保存面板后是否保存文件："+saved);
}//打開選擇打開文件面板，并選擇文件
public voidopenFilePanel(){
origContent=this.content.getText();//顯示選擇文件面板
JFileChooser fileChoose=null;if(openUrl==null){
fileChoose=newJFileChooser();
}else{
fileChoose=newJFileChooser(openUrl);
}
FileNameExtensionFilter filter=new FileNameExtensionFilter("txt & java","java","txt");
fileChoose.setFileFilter(filter);
fileChoose.setDialogTitle("Open File");
fileChoose.showOpenDialog(null);
fileChoose.setVisible(true);//得到文件
String url=fileChoose.getSelectedFile().getAbsolutePath(); //得到選擇文件的路徑//設置保存面板顯示的路徑
JF_Notpad.setOpenUrl(url);
Save saveF=new Save("Save",this);
saveF.setVisible(false);
saveF.setUrl(url);
JLabel temp=saveF.getUrlL();
temp.setText(url+" ?");
saveF.setUrlL(temp);
String name=fileChoose.getSelectedFile().getName();this.setTitle(name+" - Notpad"); //設置主窗口標題//文件流
FileReader fRead=null; BufferedReader buffRead=null;try{
fRead=newFileReader(openUrl);
buffRead=newBufferedReader(fRead);
String str=""; String readLine="";
readLine=buffRead.readLine();while(readLine!=null){
str=str+readLine+"
";
readLine=buffRead.readLine();
}
content.setText(str);
origContent=str;
}catch(Exception a){
System.out.println("Open file error!!");
}finally{try{
fRead.close();
buffRead.close();
}catch(Exception b){
System.out.println("Open file stream error!!");
}
}
}public booleanisSaved() {returnsaved;
}public void setSaved(booleansaved) {this.saved =saved;
}public booleangetOpenFileBool() {returnopenFileBool;
}public void setOpenFileBool(booleanopenFileBool) {this.openFileBool =openFileBool;
}publicString getOrigContent() {returnorigContent;
}public voidsetOrigContent(String origContent) {this.origContent =origContent;
}publicJTextArea getContent() {returncontent;
}public voidsetContent(JTextArea content) {this.content =content;
}
}
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