java仿windows记事本功能完整版
最近学了Java编程，就编了仿windows系统下的记事本练练手，这个记事本实现了windows系统下的大部分功能，只有很少的部分没有实现，比如撤销命令的不完美，这是本人的能力有限，还有那些JMenuItem的是否可用问题，这只是本人比较偷懒，无心再去实现，希望能够与广大的Java爱好者分享我的代码，共同学习进步，我肯定有不足之处，比如有些代码的重复，代码的布置，以及变量的取名问题，希望广大的Java大牛多提宝贵意见，话不多少，直接上代码！
packageorg.mfy.notepad;
importjava.awt.*;
importjavax.swing.*;
importjava.awt.event.*;
importjava.io.*;
importjava.text.SimpleDateFormat;
importjava.util.Date;
importjava.util.HashMap;
importjava.util.Map;
importjavax.swing.event.*;
importjavax.swing.text.BadLocationException;
importjavax.swing.undo.*;
publicclassMyNotepadextendsJFrame{
//文件的标题
privateStringtitle="无标题";
//菜单栏
privateJPanelmp=newJPanel();
privateJMenuBarmb=newJMenuBar();
privateJMenu
file=newJMenu("文件(F)"),
edit=newJMenu("编辑(E)"),
format=newJMenu("格式(V)"),
view=newJMenu("查看(O)"),
help=newJMenu("帮助(H)");
//文件
privateJMenuItem
newFile=newJMenuItem("新建(N)"),
open=newJMenuItem("打开(O)"),
save=newJMenuItem("保存(S)"),
exit=newJMenuItem("退出(X)");
//编辑
privateJMenuItem
undo=newJMenuItem("撤销(U)"),
cut=newJMenuItem("剪切(T)"),
copy=newJMenuItem("复制(C)"),
paste=newJMenuItem("粘贴(P)"),
delete=newJMenuItem("删除(L)"),
find=newJMenuItem("查找(F)"),
replace=newJMenuItem("替换(R)"),
goTo=newJMenuItem("转到(G)"),
selectAll=newJMenuItem("全选(A)"),
time=newJMenuItem("时间/日期(D)");
//格式
privateJMenuItemfont=newJMenuItem("字体(F)");
privateJCheckBoxautoLineWrap=newJCheckBox("自动换行(W)");
//查看
privateJMenuItemstate=newJMenuItem("状态(S)");
//帮助
privateJMenuItem
checkHelp=newJMenuItem("查看帮助(H)"),
about=newJMenuItem("关于记事本(A)");
//文本域
privateJTextAreatxt=newJTextArea();
//弹出菜单
privateJPopupMenujpm=newJPopupMenu();
//定义弹出窗口的打开状态
privatestaticbooleanisOpen=false;
//获取屏幕的尺寸
privateintx=(int)Toolkit.getDefaultToolkit().getScreenSize().getWidth();
privateinty=(int)Toolkit.getDefaultToolkit().getScreenSize().getHeight();
publicMyNotepad(){
//新建
newFile.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
Stringtext=txt.getText();
if(!text.equals("")){
Stringstr[]=text.split("\n");
intresult=JOptionPane.showConfirmDialog(null,"是否将更改保存到"+
title+"?","记事本",JOptionPane.YES_NO_CANCEL_OPTION);
if(result==JOptionPane.NO_OPTION){//不保存
txt.setText("");
}elseif(result==JOptionPane.CANCEL_OPTION){}//取消保存
elseif(result==0){//保存
JFileChooserjfc=newJFileChooser();
jfc.setDialogTitle("保存");
intssd=jfc.showSaveDialog(MyNotepad.this);
if(ssd==jfc.APPROVE_OPTION){
Filefile=jfc.getSelectedFile();
PrintStreamout=null;
try{
out=newPrintStream(newFileOutputStream(file));
}catch(FileNotFoundExceptione1){
//TODOAuto-generatedcatchblock
e1.printStackTrace();
}
for(Strings:str){
out.print(s+"\r\n");
}
out.close();
txt.setText("");;
}
}
}
}
});
//打开
open.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
JFileChooserjfc=newJFileChooser();
jfc.setDialogTitle("打开");
intresult=jfc.showOpenDialog(MyNotepad.this);
if(result==JFileChooser.CANCEL_OPTION){}
elseif(result==JFileChooser.APPROVE_OPTION){
Filefile=jfc.getSelectedFile();
BufferedReaderinput=null;
try{
input=newBufferedReader(newInputStreamReader(newFileInputStream(file)));
}catch(FileNotFoundExceptione1){
//TODOAuto-generatedcatchblock
e1.printStackTrace();
}
Stringtemp=null;
try{
while((temp=input.readLine())!=null){
txt.append(temp+"\n");
}
}catch(IOExceptione1){
//TODOAuto-generatedcatchblock
e1.printStackTrace();
}
try{
input.close();
}catch(IOExceptione1){
//TODOAuto-generatedcatchblock
e1.printStackTrace();
}
}
}
});
//保存
save.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
Stringstr[]=txt.getText().split("\n");
JFileChooserjfc=newJFileChooser();
jfc.setDialogTitle("保存");
intssd=jfc.showSaveDialog(MyNotepad.this);
if(ssd==jfc.APPROVE_OPTION){
Filefile=jfc.getSelectedFile();
PrintStreamout=null;
try{
out=newPrintStream(newFileOutputStream(file));
}catch(FileNotFoundExceptione1){
//TODOAuto-generatedcatchblock
e1.printStackTrace();
}
for(Strings:str){
out.print(s+"\r\n");
}
out.close();
}
}
});
//退出
exit.addActionListener(newActionListener(){
@Override
publicvoidactionPerformed(ActionEvente){
Stringstr=txt.getText();
if(!str.equals("")){
intresult=JOptionPane.showConfirmDialog(null,"退出前是否保存？","退出",
JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.WARNING_MESSAGE);
if(result==JOptionPane.YES_OPTION){}
if(result==JOptionPane.NO_OPTION){
dispose();
}
if(result==JOptionPane.CANCEL_OPTION){}
}else{
dispose();
}
}
});
/**
*撤销功能
*/
finalUndoManagerundom=newUndoManager();
txt.getDocument().addUndoableEditListener(newUndoableEditListener(){
@Override
publicvoidundoableEditHappened(UndoableEditEvente){
undom.addEdit(e.getEdit());
}
});
undo.addActionListener(newActionListener(){
@Override
publicvoidactionPerformed(ActionEvente){
if(undom.canUndo()){
undom.undo();
}
}
});
//剪切
cut.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
txt.cut();
}
});
//粘贴
paste.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
txt.paste();
}
});
//删除
delete.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
intstart=txt.getSelectionStart();
intend=txt.getSelectionEnd();
txt.replaceRange("",start,end);
}
});
/**
*为了更好地访问本类中的属性，所以查找使用内部类
*/
//定义查找内部类
classFindDialogextendsJDialog{
privateJPanelpan=newJPanel();
privateJLabellabel=newJLabel("查找内容(N):");
privateJTextFieldtxtf=newJTextField(20);
privateJButtonbtnf=newJButton("查找下一个(F)");
privateJButtonbtnc=newJButton("取消");
privateJCheckBoxjcb=newJCheckBox("区分大小写(C)");
privateJRadioButtonjrb1=newJRadioButton("向上(U)");
privateJRadioButtonjrb2=newJRadioButton("向下(D)",true);
publicFindDialog(){
super(MyNotepad.this,"查找");
//当文本框中有内容时按钮才起作用
txtf.getDocument().addDocumentListener(newDocumentListener(){
@Override
publicvoidinsertUpdate(DocumentEvente){
btnf.setEnabled(true);
}
@Override
publicvoidremoveUpdate(DocumentEvente){
if(txtf.getText().length()==0){
btnf.setEnabled(false);
}
}
@Override
publicvoidchangedUpdate(DocumentEvente){
}
});
btnf.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
Stringstr=txtf.getText();
Stringtexta=txt.getText();
intstart=0;
intend=0;
intcaretPosition=txt.getCaretPosition();//记录光标的起始位置
if(jcb.isSelected()){//区分大小写
if(jrb2.isSelected()){//向下查询,如果有光标就从光标的位置开始查找，否则就从选中的文本之后的位置开始查找
start=(txt.getSelectedText()==null?caretPosition:txt.getSelectionEnd());
start=texta.indexOf(str,start);
if(start==-1){//如果没有找到
JOptionPane.showMessageDialog(null,"找不到"+str);
}else{//如果找到了
end=start+str.length();
txt.select(start,end);
}
}elseif(jrb1.isSelected()){//向上查询,如果有光标就从光标的位置开始查找，否则就从选中的文本之前的位置开始查找
end=(txt.getSelectedText()==null?caretPosition:txt.getSelectionStart());
Stringsubtext=texta.substring(0,end);
start=subtext.lastIndexOf(str,end-1);
if(start==-1){
JOptionPane.showMessageDialog(null,"找不到"+str);
}else{
end=start+str.length();
txt.select(start,end);
}
}
}
if(!jcb.isSelected()){//不区分大小写
texta=texta.toLowerCase();
if(jrb2.isSelected()){//向下查询,如果有光标就从光标的位置开始查找，否则就从选中的文本之后的位置开始查找
start=(txt.getSelectedText()==null?caretPosition:txt.getSelectionEnd());
start=texta.indexOf(str.toLowerCase(),start);
if(start==-1){//如果没有找到
JOptionPane.showMessageDialog(null,"找不到"+str);
}else{//如果找到了
end=start+str.length();
txt.select(start,end);
}
}elseif(jrb1.isSelected()){//向上查询,如果有光标就从光标的位置开始查找，否则就从选中的文本之前的位置开始查找
end=(txt.getSelectedText()==null?caretPosition:txt.getSelectionStart());
Stringsubtext=texta.substring(0,end);
start=subtext.lastIndexOf(str.toLowerCase(),end-1);
if(start==-1){
JOptionPane.showMessageDialog(null,"找不到"+str);
}else{
end=start+str.length();
txt.select(start,end);
}
}
}
}
});
btnc.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
dispose();
isOpen=false;
}
});
this.setLayout(null);
label.setBounds(12,10,80,20);
txtf.setBounds(100,10,170,20);
btnf.setBounds(280,10,90,20);
btnf.setMargin(newInsets(0,0,0,0));
btnf.setEnabled(false);//初始化查找下一个按钮不可选
jcb.setBounds(12,70,110,20);
jrb1.setMargin(newInsets(0,0,0,0));
jrb2.setMargin(newInsets(0,0,0,0));
ButtonGroupgroup=newButtonGroup();
group.add(jrb1);
group.add(jrb2);
pan.add(jrb1);
pan.add(jrb2);
pan.setBorder(BorderFactory.createTitledBorder("方向"));
pan.setBounds(120,40,150,55);
btnc.setBounds(280,40,90,20);
btnc.setMargin(newInsets(0,0,0,0));
add(btnf);
add(label);
add(txtf);
add(jcb);
add(pan);
add(btnc);
setSize(380,130);
setLocation(x/2-190,y/2-65);
setResizable(false);
setVisible(true);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
//每次只能显示一个窗口
addWindowListener(newWindowAdapter(){
publicvoidwindowOpened(WindowEvente){
isOpen=true;
}
});
addWindowListener(newWindowAdapter(){
publicvoidwindowClosing(WindowEvente){
isOpen=false;
}
});
}
}
//查找的监听事件
find.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
if(!isOpen){
newFindDialog();
}
}
});
//替换内部类
classReplaceDialogextendsJDialog{
privateJLabellabel1=newJLabel("查找内容(N)");
privateJLabellabel2=newJLabel("替换为(P)");
privateJTextFieldfield1=newJTextField(20);
privateJTextFieldfield2=newJTextField(20);
privateJButtonfind=newJButton("查找下一个(F)");
privateJButtonreplace=newJButton("替换(R)");
privateJButtonreplaceAll=newJButton("全部替换(A)");
privateJButtoncanc=newJButton("取消");
privateJCheckBoxjcb=newJCheckBox("区分大小写(C)");
publicReplaceDialog(){
super(MyNotepad.this,"查找");
this.setLayout(null);
label1.setBounds(12,5,80,20);
label2.setBounds(12,30,80,20);
field1.setBounds(100,5,170,20);
field2.setBounds(100,30,170,20);
find.setBounds(280,5,90,20);
find.setMargin(newInsets(0,0,0,0));
replace.setBounds(280,30,90,20);
replace.setMargin(newInsets(0,0,0,0));
replaceAll.setBounds(280,55,90,20);
replaceAll.setMargin(newInsets(0,0,0,0));
jcb.setBounds(12,70,105,20);
jcb.setMargin(newInsets(0,0,0,0));
canc.setBounds(280,80,90,20);
field1.getDocument().addDocumentListener(newDocumentListener(){
//当文本框中有内容时按钮才起作用
@Override
publicvoidinsertUpdate(DocumentEvente){
find.setEnabled(true);
replace.setEnabled(true);
replaceAll.setEnabled(true);
}
@Override
publicvoidremoveUpdate(DocumentEvente){
if(field1.getText().length()==0){
find.setEnabled(false);
replace.setEnabled(false);
replaceAll.setEnabled(false);
}
}
@Override
publicvoidchangedUpdate(DocumentEvente){
}
});
//查找下一个按钮
find.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
newfindFunction();
}
});
//替换按钮
replace.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
//如果有选中的内容就替换，然后选中下一个要替换的内容，否则先查找要替换的内容
if(txt.getSelectedText()!=null){
txt.replaceSelection(field2.getText());
}
newfindFunction();
}
});
//替换所有按钮
replaceAll.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
Stringstr=txt.getText();
if(jcb.isSelected()){
str=str.replaceAll(field1.getText(),field2.getText());
}else{
str=str.replaceAll("(?i)"+field1.getText(),field2.getText());
}
txt.setText(str);
}
});
//取消按钮
canc.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
dispose();
isOpen=false;
}
});
add(label1);
add(label2);
add(field1);
add(field2);
find.setEnabled(false);
replace.setEnabled(false);
replaceAll.setEnabled(false);
add(find);
add(replace);
add(replaceAll);
add(jcb);
add(canc);
setSize(380,130);
setLocation(x/2-190,y/2-65);
setResizable(false);
setVisible(true);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
addWindowListener(newWindowAdapter(){
publicvoidwindowOpened(WindowEvente){
isOpen=true;
}
});
addWindowListener(newWindowAdapter(){
publicvoidwindowClosing(WindowEvente){
isOpen=false;
}
});
}
//替换对话框中查找功能类
/**
*为了简化代码，将替换对话框里面的查找功能提取出来，成为一个内部类
*/
classfindFunction{
publicfindFunction(){//要替换的字符串的位置
intstart=0;
intend=0;
intcaretPosition=txt.getCaretPosition();
Stringstr=field1.getText();
Stringtexta=txt.getText();
//区分大小写，向下查询,如果有光标就从光标的位置开始查找，否则就从选中的文本之后的位置开始查找
if(jcb.isSelected()){
start=(txt.getSelectedText()==null?caretPosition:txt.getSelectionEnd());
start=texta.indexOf(str.toLowerCase(),start);
if(start==-1){//如果没有找到
JOptionPane.showMessageDialog(null,"找不到"+str);
}else{//如果找到了
end=start+str.length();
txt.select(start,end);
}
}elseif(!jcb.isSelected()){//不区分大小写
texta=texta.toLowerCase();
//向下查询,如果有光标就从光标的位置开始查找，否则就从选中的文本之后的位置开始查找
start=(txt.getSelectedText()==null?caretPosition:txt.getSelectionEnd());
start=texta.indexOf(str.toLowerCase(),start);
if(start==-1){//如果没有找到
JOptionPane.showMessageDialog(null,"找不到"+str);
}else{//如果找到了
end=start+str.length();
txt.select(start,end);
}
}
}
}
}
replace.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
if(!isOpen){
newReplaceDialog();
}
}
});
//转到内部类
classGoToDialogextendsJDialog{
privateJLabellabel=newJLabel("行号(L):");
privateJTextFieldfield=newJTextField();
privateJButtongoToBtn=newJButton("转到");
privateJButtoncanBtn=newJButton("取消");
privateintrowNum=0;//行号
publicGoToDialog(){
field.addKeyListener(newKeyAdapter(){
publicvoidkeyTyped(KeyEvente){
if(!(e.getKeyChar()>='0'&&e.getKeyChar()<='9')){
e.consume();
}
}
});
//转到
goToBtn.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
rowNum=Integer.parseInt(field.getText());
if(rowNum>txt.getLineCount()){
JOptionPane.showMessageDialog(null,"行数超过了总行数","记事本-跳行",JOptionPane.INFORMATION_MESSAGE);
field.setText(txt.getLineCount()+"");
field.requestFocus();//获取文本域的焦点
field.selectAll();
}else{
intposition=0;
try{
position=txt.getLineStartOffset(rowNum-1);
}catch(BadLocationExceptione1){
//TODOAuto-generatedcatchblock
e1.printStackTrace();
}
GoToDialog.this.dispose();
txt.requestFocus();
txt.setCaretPosition(position);
}
}
});
//取消
canBtn.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
dispose();
isOpen=false;
}
});
setLayout(null);
label.setBounds(12,10,100,20);
field.setBounds(12,30,230,20);
goToBtn.setBounds(85,65,75,20);
canBtn.setBounds(167,65,75,20);
add(label);
add(field);
add(goToBtn);
add(canBtn);
setTitle("转到指定行");
setModal(true);//当对话框弹出时母窗口不可编辑
setSize(270,130);
setLocation(x/2-135,y/2-65);
setResizable(false);
setVisible(true);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
addWindowListener(newWindowAdapter(){
publicvoidwindowOpened(WindowEvente){
isOpen=true;
}
});
addWindowListener(newWindowAdapter(){
publicvoidwindowClosing(WindowEvente){
isOpen=false;
}
});
}
}
//转到
goTo.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
if(!isOpen){
newGoToDialog();
}
}
});
//全选
selectAll.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
txt.requestFocus();
txt.selectAll();
}
});
time.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
StringdateTime=null;
intpos=txt.getCaretPosition();
dateTime=newSimpleDateFormat("hh:mmyyyy/MM/dd").format(newDate());
txt.insert(dateTime,pos);
}
});
//自动换行
autoLineWrap.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
if(autoLineWrap.isSelected()){
txt.setLineWrap(true);
}else{
txt.setLineWrap(false);
}
}
});
//字体内部类
classFontDialogextendsJDialog{
privateJLabellabel1=newJLabel("字体(F):");
privateJLabellabel2=newJLabel("字形(Y):");
privateJLabellabel3=newJLabel("大小(S):");
privateJLabelinstns=newJLabel("中文示例AaBaCc",JLabel.CENTER);
privateJTextFieldfield1=newJTextField();
privateJTextFieldfield2=newJTextField();
privateJTextFieldfield3=newJTextField();
privateStringfonts[]=GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames();
privateJScrollPanescr1=newJScrollPane();
privateJScrollPanescr2=newJScrollPane();
privateJScrollPanescr3=newJScrollPane();
privateJListfontList=null;
privateJListfStyleList=null;
privateJListfSizeList=null;
privateJButtonokBtn=newJButton("确定");
privateJButtoncancBtn=newJButton("取消");
//示例的显示
privateStringselectedFont="Fixedsys";
privateintselectedStyle=Font.PLAIN;
privatefloatselectedSize=16;
publicFontDialog(){
fontList=newJList(fonts);
//fontStyle
Stringstyle[]={"常规","倾斜","粗体","倾斜粗体"};
fStyleList=newJList(style);
//fontSize
Stringsize[]={"8","9","10","11","12","14","16","18","20","22","24",
"26","28","36","48","72","初号","小号","一号","小一","二号",
"小二","三号","小三","四号","小四","五号","六号","小六","七号","八号"};
fSizeList=newJList(size);
//Jlist中一次只能选择一个选项
fontList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
fStyleList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
fSizeList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
scr1.add(fontList);
scr2.add(fStyleList);
scr3.add(fSizeList);
scr1.setViewportView(fontList);
scr2.setViewportView(fStyleList);
scr3.setViewportView(fSizeList);
okBtn.setBounds(250,450,80,30);
cancBtn.setBounds(340,450,80,30);
label1.setBounds(20,20,50,20);
label2.setBounds(205,20,50,20);
label3.setBounds(350,20,50,20);
instns.setBounds(205,280,215,80);
instns.setBorder(BorderFactory.createTitledBorder("示例"));
field1.setBounds(20,40,170,20);
field2.setBounds(205,40,130,20);
field3.setBounds(350,40,70,20);
scr1.setBounds(20,60,170,170);
scr2.setBounds(205,60,130,170);
scr3.setBounds(350,60,70,150);
scr1.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
scr2.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
scr3.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
//文本框1
field1.addKeyListener(newKeyAdapter(){
publicvoidkeyTyped(KeyEvente){
intcount=0;//文本框中的字符数
Stringstr=null;//保存输入到文本框中的字符
intsize=fontList.getModel().getSize();//fontList中的文本个数
str=field1.getText()+e.getKeyChar()+"";
count=str.length();
for(inti=0;i=count){
//判断输入的是否与JList中的内容部分匹配(忽略大小写)
if(fontList.getModel().getElementAt(i).substring(0,count).compareToIgnoreCase(str)==0){
fontList.ensureIndexIsVisible(size-i>=10?i+9:size-1);
if(fontList.getModel().getElementAt(i).compareToIgnoreCase(str)==0){
fontList.setSelectedIndex(i);
}
break;
}
else{
fontList.ensureIndexIsVisible(0);
fontList.clearSelection();
}
}
}
}
});
//文本框2
field2.addKeyListener(newKeyAdapter(){
publicvoidkeyTyped(KeyEvente){
intcount=0;//文本框中的字符数
Stringstr=null;//保存输入到文本框中的字符
intsize=fStyleList.getModel().getSize();//fontList中的文本个数
str=field2.getText()+e.getKeyChar()+"";
count=str.length();
for(inti=0;i=count){
//判断输入的是否与JList中的内容部分匹配(忽略大小写)
if(fStyleList.getModel().getElementAt(i).substring(0,count).compareToIgnoreCase(str)==0){
if(fStyleList.getModel().getElementAt(i).compareToIgnoreCase(str)==0){
fStyleList.setSelectedIndex(i);
}
break;
}
else{
fStyleList.clearSelection();
}
}
}
}
});
//文本框3
field3.addKeyListener(newKeyAdapter(){
publicvoidkeyTyped(KeyEvente){
intcount=0;//文本框中的字符数
Stringstr=null;//保存输入到文本框中的字符
intsize=fSizeList.getModel().getSize();//fontList中的文本个数
str=field3.getText()+e.getKeyChar()+"";
count=str.length();
for(inti=0;i=count){
//判断输入的是否与JList中的内容部分匹配(忽略大小写)
if(fSizeList.getModel().getElementAt(i).substring(0,count).compareToIgnoreCase(str)==0){
fSizeList.ensureIndexIsVisible(size-i>=9?i+8:size-1);
if(fSizeList.getModel().getElementAt(i).compareToIgnoreCase(str)==0){
fSizeList.setSelectedIndex(i);
}
break;
}
else{
fSizeList.ensureIndexIsVisible(0);
fSizeList.clearSelection();
}
}
}
}
});
//设置示例中的文本字体样式
//设置字形与字号对照表
finalMapmap=newHashMap();
map.put("常规",(float)Font.PLAIN);
map.put("倾斜",(float)Font.ITALIC);
map.put("粗体",(float)Font.BOLD);
map.put("倾斜粗体",(float)(Font.ITALIC+Font.BOLD));
map.put("初号",42f);
map.put("小号",36f);
map.put("一号",26f);
map.put("小一",24f);
map.put("二号",22f);
map.put("小二",18f);
map.put("三号",16f);
map.put("小三",15f);
map.put("四号",14f);
map.put("小四",12f);
map.put("五号",10.5f);
map.put("六号",7.5f);
map.put("小六",6.5f);
map.put("七号",5.5f);
map.put("八号",5f);
//字体列表监听事件
fontList.addListSelectionListener(newListSelectionListener(){
@Override
publicvoidvalueChanged(ListSelectionEvente){
StringtxtFont=txt.getFont().getName();//获取文本中的字体
selectedFont=fontList.isSelectionEmpty()?txtFont:fontList.getSelectedValue();
instns.setFont(newFont(selectedFont,selectedStyle,(int)selectedSize));
}
});
//字体样式监听事件
fStyleList.addListSelectionListener(newListSelectionListener(){
@Override
publicvoidvalueChanged(ListSelectionEvente){
inttxtStyle=txt.getFont().getStyle();//获取文本中的字体
selectedStyle=(int)(fStyleList.isSelectionEmpty()?txtStyle:map.get(fStyleList.getSelectedValue()));
instns.setFont(newFont(selectedFont,selectedStyle,(int)selectedSize));
}
});
//字体大小监听
fSizeList.addListSelectionListener(newListSelectionListener(){
publicvoidvalueChanged(ListSelectionEvente){
inttxtSize=txt.getFont().getSize();
if(!fSizeList.isSelectionEmpty()){
Stringtemp=fSizeList.getSelectedValue();
if(temp.matches("\\d+")){
selectedSize=Integer.parseInt(temp);
}else{
selectedSize=map.get(fSizeList.getSelectedValue());
}
}
instns.setFont(newFont(selectedFont,selectedStyle,(int)selectedSize));
}
});
//确定按钮
okBtn.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
txt.setFont(newFont(selectedFont,selectedStyle,(int)selectedSize));
isOpen=false;
dispose();
}
});
//取消按钮
cancBtn.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
dispose();
isOpen=false;
}
});
/*classMyRenderextendsDefaultListCellRenderer{
publicComponentgetListCellRendererComponent(JListlist,Objectvalue,
intindex,booleanisSelected,
booleancellHasFocus){
Stringfont=value.toString();
setFont(newFont(font,Font.PLAIN,12));
returnthis;
}
}*/
setLayout(null);
add(label1);
add(label2);
add(label3);
add(instns);
add(field1);
add(field2);
add(field3);
add(scr1);
add(scr2);
add(scr3);
add(okBtn);
add(cancBtn);
setModal(true);//当对话框弹出时母窗口不可编辑
setSize(440,530);
setLocation(x/2-220,y/2-265);
setResizable(false);
setVisible(true);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
addWindowListener(newWindowAdapter(){
publicvoidwindowOpened(WindowEvente){
isOpen=true;
}
});
addWindowListener(newWindowAdapter(){
publicvoidwindowClosing(WindowEvente){
isOpen=false;
}
});
}
}
//字体
font.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
if(!isOpen){
newFontDialog();
}
}
});
//查看帮助
checkHelp.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
JOptionPane.showMessageDialog(null,"与Windows系统下的帮助相似","帮助",JOptionPane.CLOSED_OPTION);
}
});
//关于
about.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente){
JOptionPane.showMessageDialog(null,"仿Windows记事本，初学Java的练手作品","关于",JOptionPane.CLOSED_OPTION);
}
});
//右键弹出菜单内部类
classpopupListenerextendsMouseAdapter{
privateJPopupMenupopup=null;
publicpopupListener(JPopupMenupopup){
this.popup=popup;
}
publicvoidmouseReleased(MouseEvente){
showPopupMenu(e);
}
publicvoidmouseClicked(MouseEvente){
showPopupMenu(e);
}
privatevoidshowPopupMenu(MouseEvente){
if(e.isPopupTrigger()){
//右键弹出菜单
jpm.add(undo);
jpm.add(cut);
jpm.add(copy);
jpm.add(delete);
jpm.add(find);
jpm.add(replace);
jpm.add(goTo);
jpm.add(selectAll);
jpm.add(time);
popup.show(e.getComponent(),e.getX(),e.getY());
}
}
}
//右键弹出菜单
txt.addMouseListener(newpopupListener(jpm));
//设置快捷键
newFile.setAccelerator(KeyStroke.getKeyStroke('N',java.awt.event.InputEvent.CTRL_DOWN_MASK));
open.setAccelerator(KeyStroke.getKeyStroke('O',java.awt.event.InputEvent.CTRL_DOWN_MASK));
save.setAccelerator(KeyStroke.getKeyStroke('S',java.awt.event.InputEvent.CTRL_DOWN_MASK));
undo.setAccelerator(KeyStroke.getKeyStroke('Z',java.awt.event.InputEvent.CTRL_DOWN_MASK));
cut.setAccelerator(KeyStroke.getKeyStroke('X',java.awt.event.InputEvent.CTRL_DOWN_MASK));
copy.setAccelerator(KeyStroke.getKeyStroke('C',java.awt.event.InputEvent.CTRL_DOWN_MASK));
paste.setAccelerator(KeyStroke.getKeyStroke('V',java.awt.event.InputEvent.CTRL_DOWN_MASK));
find.setAccelerator(KeyStroke.getKeyStroke('F',java.awt.event.InputEvent.CTRL_DOWN_MASK));
replace.setAccelerator(KeyStroke.getKeyStroke('H',java.awt.event.InputEvent.CTRL_DOWN_MASK));
goTo.setAccelerator(KeyStroke.getKeyStroke('G',java.awt.event.InputEvent.CTRL_DOWN_MASK));
selectAll.setAccelerator(KeyStroke.getKeyStroke('A',java.awt.event.InputEvent.CTRL_DOWN_MASK));
time.setAccelerator((KeyStroke)KeyStroke.getAWTKeyStroke((char)KeyEvent.VK_F5));
//设置助记键
file.setMnemonic('F');
edit.setMnemonic('E');
format.setMnemonic('O');
view.setMnemonic('V');
help.setMnemonic('H');
newFile.setMnemonic('N');
open.setMnemonic('O');
save.setMnemonic('S');
exit.setMnemonic('X');
undo.setMnemonic('U');
cut.setMnemonic('T');
copy.setMnemonic('C');
paste.setMnemonic('P');
delete.setMnemonic('L');
find.setMnemonic('F');
replace.setMnemonic('R');
goTo.setMnemonic('G');
selectAll.setMnemonic('A');
time.setMnemonic('D');
font.setMnemonic('F');
autoLineWrap.setMnemonic('W');
state.setMnemonic('S');
checkHelp.setMnemonic('H');
about.setMnemonic('A');
txt.setFont(newFont("Fixedsys",Font.PLAIN,16));
txt.setEditable(true);
file.add(newFile);
file.add(open);
file.add(save);
file.addSeparator();
file.add(exit);
edit.add(undo);
edit.addSeparator();
edit.add(cut);
edit.add(copy);
edit.add(paste);
edit.add(delete);
edit.addSeparator();
edit.add(find);
edit.add(replace);
edit.add(goTo);
edit.addSeparator();
edit.add(selectAll);
edit.add(time);
format.add(autoLineWrap);
format.add(font);
view.add(state);
help.add(checkHelp);
help.addSeparator();
help.add(about);
mb.add(file);
mb.add(edit);
mb.add(format);
mb.add(view);
mb.add(help);
setJMenuBar(mb);
add(mp);
add(newJScrollPane(txt));
setVisible(true);
setSize(530,640);
setLocation(x/2-265,y/2-320);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
packageorg.mfy.notepad;
importjavax.swing.UIManager;
importjavax.swing.UnsupportedLookAndFeelException;
publicclassNotepad{
publicstaticvoidmain(String[]args){
try{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}catch(ClassNotFoundException|InstantiationException
|IllegalAccessException|UnsupportedLookAndFeelExceptione){
//TODOAuto-generatedcatchblock
e.printStackTrace();
}
newMyNotepad();
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。