仿照windows记事本，用JAVA语言编写的记事本软件。
实现对纯文本文件的新建、打开、保存、复制、粘贴、查找、替换等功能。
待实现但是失败了的功能：实时显示当前文本内的字数，实时显示时间。
可以对较大文件进行操作，有点慢）。
拿自己写的小说试了一下，姑且算是顺手吧！如果有当前字数就更好啦。
代码过长，一千多行，在这里放了部分，给大家提供参考，希望可以给大家提供一些帮助。
前期定义：
public class Text extends JFrame implements ActionListener,DocumentListener
{ //菜单
JMenu fileMenu,editMenu,formatMenu,viewMenu,helpMenu;
//右键弹出菜单项
JPopupMenu popupMenu;
JMenuItem popupMenu_Undo,popupMenu_Cut,popupMenu_Copy,popupMenu_Paste,popupMenu_Delete,popupMenu_SelectAll;
//“文件”的菜单项
JMenuItem fileMenu_New,fileMenu_Open,fileMenu_Save,fileMenu_SaveAs,fileMenu_PageSetUp,fileMenu_Print,fileMenu_Exit;
//“编辑”的菜单项
JMenuItem editMenu_Undo,editMenu_Cut,editMenu_Copy,editMenu_Paste,editMenu_Delete,editMenu_Find,editMenu_FindNext,editMenu_Replace,editMenu_GoTo,editMenu_SelectAll,editMenu_TimeDate;
//“格式”的菜单项
JCheckBoxMenuItem formatMenu_LineWrap;
JMenuItem formatMenu_Font;
//“查看”的菜单项
JCheckBoxMenuItem viewMenu_Status;
//“帮助”的菜单项
JMenuItem helpMenu_HelpTopics,helpMenu_AboutNotepad;
//“文本”编辑区域
JTextArea editArea;
//状态栏标签
JLabel statusLabel;
//系统剪贴板
Toolkit toolkit=Toolkit.getDefaultToolkit();
Clipboard clipBoard=toolkit.getSystemClipboard();
//撤销
protected UndoManager undo=new UndoManager();
protected UndoableEditListener undoHandler=new UndoHandler();
//其他变量
String oldValue;//存放编辑区原来的内容，用于比较文本是否有改动
boolean isNewFile=true;//是否新文件(未保存过的)
File currentFile;//当前文件名
菜单条-文件：
JMenuBar menuBar=new JMenuBar();
//创建文件菜单及菜单项并注册事件监听
fileMenu=new JMenu("文件(F)");
fileMenu.setMnemonic('F');//设置快捷键ALT+F
fileMenu_New=new JMenuItem("新建(N)");
fileMenu_New.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,InputEvent.CTRL_MASK));
fileMenu_New.addActionListener(this);
fileMenu_Open=new JMenuItem("打开(O)...");
fileMenu_Open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,InputEvent.CTRL_MASK));
fileMenu_Open.addActionListener(this);
fileMenu_Save=new JMenuItem("保存(S)");
fileMenu_Save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK));
fileMenu_Save.addActionListener(this);
fileMenu_SaveAs=new JMenuItem("另存为(A)...");
fileMenu_SaveAs.addActionListener(this);
fileMenu_PageSetUp=new JMenuItem("页面设置(U)...");
fileMenu_PageSetUp.addActionListener(this);
fileMenu_Print=new JMenuItem("打印(P)...");
fileMenu_Print.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P, InputEvent.CTRL_MASK));
fileMenu_Print.addActionListener(this);
fileMenu_Exit=new JMenuItem("退出(X)");
fileMenu_Exit.addActionListener(this);
editMenu=new JMenu("编辑(E)");
editMenu.setMnemonic('E');//设置快捷键ALT+E
editMenu.addMenuListener(new MenuListener()
{ public void menuCanceled(MenuEvent e)
{ checkMenuItemEnabled();
}
public void menuDeselected(MenuEvent e)
{ checkMenuItemEnabled();
}
public void menuSelected(MenuEvent e)
{ checkMenuItemEnabled();
}
});
editMenu_Undo=new JMenuItem("撤销(U)");
editMenu_Undo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z,InputEvent.CTRL_MASK));
editMenu_Undo.addActionListener(this);
editMenu_Undo.setEnabled(false);
editMenu_Cut=new JMenuItem("剪切(T)");
editMenu_Cut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.CTRL_MASK));
editMenu_Cut.addActionListener(this);
editMenu_Copy=new JMenuItem("复制(C)");
editMenu_Copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_MASK));
editMenu_Copy.addActionListener(this);
editMenu_Paste=new JMenuItem("粘贴(P)");
editMenu_Paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,InputEvent.CTRL_MASK));
editMenu_Paste.addActionListener(this);
editMenu_Delete=new JMenuItem("删除(D)");
editMenu_Delete.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE,0));
editMenu_Delete.addActionListener(this);
editMenu_Find=new JMenuItem("查找(F)...");
editMenu_Find.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F,InputEvent.CTRL_MASK));
editMenu_Find.addActionListener(this);
editMenu_FindNext=new JMenuItem("查找下一个(N)");
editMenu_FindNext.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F3,0));
editMenu_FindNext.addActionListener(this);
editMenu_Replace = new JMenuItem("替换(R)...",'R');
editMenu_Replace.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_H, InputEvent.CTRL_MASK));
editMenu_Replace.addActionListener(this);
editMenu_GoTo = new JMenuItem("转到(G)...",'G');
editMenu_GoTo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_G, InputEvent.CTRL_MASK));
editMenu_GoTo.addActionListener(this);
editMenu_SelectAll = new JMenuItem("全选",'A');
editMenu_SelectAll.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A, InputEvent.CTRL_MASK));
editMenu_SelectAll.addActionListener(this);
editMenu_TimeDate = new JMenuItem("时间/日期(D)",'D');
editMenu_TimeDate.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F5,0));
editMenu_TimeDate.addActionListener(this);
//设置菜单项的可用性：剪切，复制，粘帖，删除功能
public void checkMenuItemEnabled()
{ String selectText=editArea.getSelectedText();
if(selectText==null)
{ editMenu_Cut.setEnabled(false);
popupMenu_Cut.setEnabled(false);
editMenu_Copy.setEnabled(false);
popupMenu_Copy.setEnabled(false);
editMenu_Delete.setEnabled(false);
popupMenu_Delete.setEnabled(false);
}
else
{ editMenu_Cut.setEnabled(true);
popupMenu_Cut.setEnabled(true);
editMenu_Copy.setEnabled(true);
popupMenu_Copy.setEnabled(true);
editMenu_Delete.setEnabled(true);
popupMenu_Delete.setEnabled(true);
}
//粘帖功能可用性判断
Transferable contents=clipBoard.getContents(this);
if(contents==null)
{ editMenu_Paste.setEnabled(false);
popupMenu_Paste.setEnabled(false);
}
else
{ editMenu_Paste.setEnabled(true);
popupMenu_Paste.setEnabled(true);
}
}//方法checkMenuItemEnabled()结束
//关闭窗口时调用
public void exitWindowChoose()
{ editArea.requestFocus();
String currentValue=editArea.getText();
if(currentValue.equals(oldValue)==true)
{ System.exit(0);
}
else
{ int exitChoose=JOptionPane.showConfirmDialog(this,"您的文件尚未保存，是否保存？","退出提示",JOptionPane.YES_NO_CANCEL_OPTION);
if(exitChoose==JOptionPane.YES_OPTION)
{ //boolean isSave=false;
if(isNewFile)
{
String str=null;
JFileChooser fileChooser=new JFileChooser();
fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
fileChooser.setApproveButtonText("确定");
fileChooser.setDialogTitle("另存为");
int result=fileChooser.showSaveDialog(this);
if(result==JFileChooser.CANCEL_OPTION)
{ statusLabel.setText(" 您没有保存文件");
return;
}
File saveFileName=fileChooser.getSelectedFile();
if(saveFileName==null||saveFileName.getName().equals(""))
{ JOptionPane.showMessageDialog(this,"不合法的文件名","不合法的文件名",JOptionPane.ERROR_MESSAGE);
}
else
{ try
{ FileWriter fw=new FileWriter(saveFileName);
BufferedWriter bfw=new BufferedWriter(fw);
bfw.write(editArea.getText(),0,editArea.getText().length());
bfw.flush();
fw.close();
isNewFile=false;
currentFile=saveFileName;
oldValue=editArea.getText();
this.setTitle(saveFileName.getName()+" - 记事本");
statusLabel.setText(" 当前打开文件:"+saveFileName.getAbsoluteFile());
//isSave=true;
}
catch(IOException ioException){
}
}
}
else
{
try
{ FileWriter fw=new FileWriter(currentFile);
BufferedWriter bfw=new BufferedWriter(fw);
bfw.write(editArea.getText(),0,editArea.getText().length());
bfw.flush();
fw.close();
//isSave=true;
}
catch(IOException ioException){
}
}
System.exit(0);
}
else if(exitChoose==JOptionPane.NO_OPTION)
{ System.exit(0);
}
else
{ return;
}
}
}//关闭窗口时调用方法结束
//查找方法
public void find()
{ final JDialog findDialog=new JDialog(this,"查找",false);
Container con=findDialog.getContentPane();
con.setLayout(new FlowLayout(FlowLayout.LEFT));
JLabel findContentLabel=new JLabel("查找内容(N)：");
final JTextField findText=new JTextField(15);
JButton findNextButton=new JButton("查找下一个(F)：");
final JCheckBox matchCheckBox=new JCheckBox("区分大小写(C)");
ButtonGroup bGroup=new ButtonGroup();
final JRadioButton upButton=new JRadioButton("向上(U)");
final JRadioButton downButton=new JRadioButton("向下(U)");
downButton.setSelected(true);
bGroup.add(upButton);
bGroup.add(downButton);
JButton cancel=new JButton("取消");
//取消按钮事件处理
cancel.addActionListener(new ActionListener()
{ public void actionPerformed(ActionEvent e)
{ findDialog.dispose();
}
});
//"查找下一个"按钮监听
findNextButton.addActionListener(new ActionListener()
{ public void actionPerformed(ActionEvent e)
{ //"区分大小写(C)"的JCheckBox是否被选中
int k=0,m=0;
final String str1,str2,str3,str4,strA,strB;
str1=editArea.getText();
str2=findText.getText();
str3=str1.toUpperCase();
str4=str2.toUpperCase();
if(matchCheckBox.isSelected())//区分大小写
{ strA=str1;
strB=str2;
}
else//不区分大小写,此时把所选内容全部化成大写(或小写)，以便于查找
{ strA=str3;
strB=str4;
}
if(upButton.isSelected())
{ //k=strA.lastIndexOf(strB,editArea.getCaretPosition()-1);
if(editArea.getSelectedText()==null)
k=strA.lastIndexOf(strB,editArea.getCaretPosition()-1);
else
k=strA.lastIndexOf(strB, editArea.getCaretPosition()-findText.getText().length()-1);
if(k>-1)
{ //String strData=strA.subString(k,strB.getText().length()+1);
editArea.setCaretPosition(k);
editArea.select(k,k+strB.length());
}
else
{ JOptionPane.showMessageDialog(null,"找不到您查找的内容！","查找",JOptionPane.INFORMATION_MESSAGE);
}
}
else if(downButton.isSelected())
{ if(editArea.getSelectedText()==null)
k=strA.indexOf(strB,editArea.getCaretPosition()+1);
else
k=strA.indexOf(strB, editArea.getCaretPosition()-findText.getText().length()+1);
if(k>-1)
{ //String strData=strA.subString(k,strB.getText().length()+1);
editArea.setCaretPosition(k);
editArea.select(k,k+strB.length());
}
else
{ JOptionPane.showMessageDialog(null,"找不到您查找的内容！","查找",JOptionPane.INFORMATION_MESSAGE);
}
}
}
});//"查找下一个"按钮监听结束
//创建"查找"对话框的界面
JPanel panel1=new JPanel();
JPanel panel2=new JPanel();
JPanel panel3=new JPanel();
JPanel directionPanel=new JPanel();
directionPanel.setBorder(BorderFactory.createTitledBorder("方向"));
directionPanel.add(upButton);
directionPanel.add(downButton);
panel1.setLayout(new GridLayout(2,1));
panel1.add(findNextButton);
panel1.add(cancel);
panel2.add(findContentLabel);
panel2.add(findText);
panel2.add(panel1);
panel3.add(matchCheckBox);
panel3.add(directionPanel);
con.add(panel2);
con.add(panel3);
findDialog.setSize(410,180);
findDialog.setResizable(false);//不可调整大小
findDialog.setLocation(230,280);
findDialog.setVisible(true);
}//查找方法结束
//替换方法
public void replace()
{ final JDialog replaceDialog=new JDialog(this,"替换",false);//false时允许其他窗口同时处于激活状态(即无模式)
Container con=replaceDialog.getContentPane();//返回此对话框的contentPane对象
con.setLayout(new FlowLayout(FlowLayout.CENTER));
JLabel findContentLabel=new JLabel("查找内容(N)：");
final JTextField findText=new JTextField(15);
JButton findNextButton=new JButton("查找下一个(F):");
JLabel replaceLabel=new JLabel("替换为(P)：");
final JTextField replaceText=new JTextField(15);
JButton replaceButton=new JButton("替换(R)");
JButton replaceAllButton=new JButton("全部替换(A)");
JButton cancel=new JButton("取消");
cancel.addActionListener(new ActionListener()
{ public void actionPerformed(ActionEvent e)
{ replaceDialog.dispose();
}
});
final JCheckBox matchCheckBox=new JCheckBox("区分大小写(C)");
ButtonGroup bGroup=new ButtonGroup();
final JRadioButton upButton=new JRadioButton("向上(U)");
final JRadioButton downButton=new JRadioButton("向下(U)");
downButton.setSelected(true);
bGroup.add(upButton);
bGroup.add(downButton);
//"查找下一个"按钮监听
findNextButton.addActionListener(new ActionListener()
{ public void actionPerformed(ActionEvent e)
{
int k=0,m=0;
final String str1,str2,str3,str4,strA,strB;
str1=editArea.getText();
str2=findText.getText();
str3=str1.toUpperCase();
str4=str2.toUpperCase();
if(matchCheckBox.isSelected())//区分大小写
{ strA=str1;
strB=str2;
}
else
{ strA=str3;
strB=str4;
}
if(upButton.isSelected())
{
if(editArea.getSelectedText()==null)
k=strA.lastIndexOf(strB,editArea.getCaretPosition()-1);
else
k=strA.lastIndexOf(strB, editArea.getCaretPosition()-findText.getText().length()-1);
if(k>-1)
{ //String strData=strA.subString(k,strB.getText().length()+1);
editArea.setCaretPosition(k);
editArea.select(k,k+strB.length());
}
else
{ JOptionPane.showMessageDialog(null,"找不到您查找的内容！","查找",JOptionPane.INFORMATION_MESSAGE);
}
}
else if(downButton.isSelected())
{ if(editArea.getSelectedText()==null)
k=strA.indexOf(strB,editArea.getCaretPosition()+1);
else
k=strA.indexOf(strB, editArea.getCaretPosition()-findText.getText().length()+1);
if(k>-1)
{ //String strData=strA.subString(k,strB.getText().length()+1);
editArea.setCaretPosition(k);
editArea.select(k,k+strB.length());
}
else
{ JOptionPane.showMessageDialog(null,"找不到您查找的内容！","查找",JOptionPane.INFORMATION_MESSAGE);
}
}
}
});//"查找下一个"按钮监听结束
//"替换"按钮监听
replaceButton.addActionListener(new ActionListener()
{ public void actionPerformed(ActionEvent e)
{ if(replaceText.getText().length()==0 && editArea.getSelectedText()!=null)
editArea.replaceSelection("");
if(replaceText.getText().length()>0 && editArea.getSelectedText()!=null)
editArea.replaceSelection(replaceText.getText());
}
});//"替换"按钮监听结束
//"全部替换"按钮监听
replaceAllButton.addActionListener(new ActionListener()
{ public void actionPerformed(ActionEvent e)
{ editArea.setCaretPosition(0); //将光标放到编辑区开头
int k=0,m=0,replaceCount=0;
if(findText.getText().length()==0)
{ JOptionPane.showMessageDialog(replaceDialog,"请填写查找内容!","提示",JOptionPane.WARNING_MESSAGE);
findText.requestFocus(true);
return;
}
while(k>-1)//当文本中有内容被选中时(k>-1被选中)进行替换，否则不进行while循环
{ //"区分大小写(C)"的JCheckBox是否被选中
//int k=0,m=0;
final String str1,str2,str3,str4,strA,strB;
str1=editArea.getText();
str2=findText.getText();
str3=str1.toUpperCase();
str4=str2.toUpperCase();
if(matchCheckBox.isSelected())//区分大小写
{ strA=str1;
strB=str2;
}
else//不区分大小写,此时把所选内容全部化成大写(或小写)，以便于查找
{ strA=str3;
strB=str4;
}
if(upButton.isSelected())
{ //k=strA.lastIndexOf(strB,editArea.getCaretPosition()-1);
if(editArea.getSelectedText()==null)
k=strA.lastIndexOf(strB,editArea.getCaretPosition()-1);
else
k=strA.lastIndexOf(strB, editArea.getCaretPosition()-findText.getText().length()-1);
if(k>-1)
{ //String strData=strA.subString(k,strB.getText().length()+1);
editArea.setCaretPosition(k);
editArea.select(k,k+strB.length());
}
else
{ if(replaceCount==0)
{ JOptionPane.showMessageDialog(replaceDialog, "找不到您查找的内容!", "记事本",JOptionPane.INFORMATION_MESSAGE);
}
else
{ JOptionPane.showMessageDialog(replaceDialog,"成功替换"+replaceCount+"个匹配内容!","替换成功",JOptionPane.INFORMATION_MESSAGE);
}
}
}
else if(downButton.isSelected())
{ if(editArea.getSelectedText()==null)
k=strA.indexOf(strB,editArea.getCaretPosition()+1);
else
k=strA.indexOf(strB, editArea.getCaretPosition()-findText.getText().length()+1);
if(k>-1)
{ //String strData=strA.subString(k,strB.getText().length()+1);
editArea.setCaretPosition(k);
editArea.select(k,k+strB.length());
}
else
{ if(replaceCount==0)
{ JOptionPane.showMessageDialog(replaceDialog, "找不到您查找的内容!", "记事本",JOptionPane.INFORMATION_MESSAGE);
}
else
{ JOptionPane.showMessageDialog(replaceDialog,"成功替换"+replaceCount+"个匹配内容!","替换成功",JOptionPane.INFORMATION_MESSAGE);
}
}
}
if(replaceText.getText().length()==0 && editArea.getSelectedText()!= null)
{ editArea.replaceSelection("");
replaceCount++;
}
if(replaceText.getText().length()>0 && editArea.getSelectedText()!= null)
{ editArea.replaceSelection(replaceText.getText());
replaceCount++;
}
}//while循环结束
}
});//"替换全部"方法结束
//创建"替换"对话框的界面
JPanel directionPanel=new JPanel();
directionPanel.setBorder(BorderFactory.createTitledBorder("方向"));
directionPanel.add(downButton);
JPanel panel1=new JPanel();
JPanel panel2=new JPanel();
JPanel panel3=new JPanel();
JPanel panel4=new JPanel();
panel4.setLayout(new GridLayout(2,1));
panel1.add(findContentLabel);
panel1.add(findText);
panel1.add(findNextButton);
panel4.add(replaceButton);
panel4.add(replaceAllButton);
panel2.add(replaceLabel);
panel2.add(replaceText);
panel2.add(panel4);
panel3.add(matchCheckBox);
panel3.add(directionPanel);
panel3.add(cancel);
con.add(panel1);
con.add(panel2);
con.add(panel3);
replaceDialog.setSize(420,220);
replaceDialog.setResizable(false);
replaceDialog.setLocation(230,280);
replaceDialog.setVisible(true);
}
public void font()
{ final JDialog fontDialog=new JDialog(this,"字体设置",false);
Container con=fontDialog.getContentPane();
con.setLayout(new FlowLayout(FlowLayout.LEFT));
JLabel fontLabel=new JLabel("字体(F)：");
fontLabel.setPreferredSize(new Dimension(100,20));
JLabel styleLabel=new JLabel("字形(Y)：");
styleLabel.setPreferredSize(new Dimension(100,20));
JLabel sizeLabel=new JLabel("大小(S)：");
sizeLabel.setPreferredSize(new Dimension(100,20));
final JLabel sample=new JLabel("BB亲的记事本-MCC's Notepad");
//sample.setHorizontalAlignment(SwingConstants.CENTER);
final JTextField fontText=new JTextField(9);
fontText.setPreferredSize(new Dimension(200,20));
final JTextField styleText=new JTextField(8);
styleText.setPreferredSize(new Dimension(200,20));
final int style[]={Font.PLAIN,Font.BOLD,Font.ITALIC,Font.BOLD+Font.ITALIC};
final JTextField sizeText=new JTextField(5);
sizeText.setPreferredSize(new Dimension(200,20));
JButton okButton=new JButton("确定");
JButton cancel=new JButton("取消");
cancel.addActionListener(new ActionListener()
{ public void actionPerformed(ActionEvent e)
{ fontDialog.dispose();
}
});
Font currentFont=editArea.getFont();
fontText.setText(currentFont.getFontName());
fontText.selectAll();
//styleText.setText(currentFont.getStyle());
//styleText.selectAll();
if(currentFont.getStyle()==Font.PLAIN)
styleText.setText("常规");
else if(currentFont.getStyle()==Font.BOLD)
styleText.setText("粗体");
else if(currentFont.getStyle()==Font.ITALIC)
styleText.setText("斜体");
else if(currentFont.getStyle()==(Font.BOLD+Font.ITALIC))
styleText.setText("粗斜体");
styleText.selectAll();
String str=String.valueOf(currentFont.getSize());
sizeText.setText(str);
sizeText.selectAll();
final JList fontList,styleList,sizeList;
GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();
final String fontName[]=ge.getAvailableFontFamilyNames();
fontList=new JList(fontName);
fontList.setFixedCellWidth(86);
fontList.setFixedCellHeight(20);
fontList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
final String fontStyle[]={"常规","粗体","斜体","粗斜体"};
styleList=new JList(fontStyle);
styleList.setFixedCellWidth(86);
styleList.setFixedCellHeight(20);
styleList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
if(currentFont.getStyle()==Font.PLAIN)
styleList.setSelectedIndex(0);
else if(currentFont.getStyle()==Font.BOLD)
styleList.setSelectedIndex(1);
else if(currentFont.getStyle()==Font.ITALIC)
styleList.setSelectedIndex(2);
else if(currentFont.getStyle()==(Font.BOLD+Font.ITALIC))
styleList.setSelectedIndex(3);
final String fontSize[]={"8","9","10","11","12","14","16","18","20","22","24","26","28","36","48","72"};
sizeList=new JList(fontSize);
sizeList.setFixedCellWidth(43);
sizeList.setFixedCellHeight(20);
sizeList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
fontList.addListSelectionListener(new ListSelectionListener()
{ public void valueChanged(ListSelectionEvent event)
{ fontText.setText(fontName[fontList.getSelectedIndex()]);
fontText.selectAll();
Font sampleFont1=new Font(fontText.getText(),style[styleList.getSelectedIndex()],Integer.parseInt(sizeText.getText()));
sample.setFont(sampleFont1);
}
});
styleList.addListSelectionListener(new ListSelectionListener()
{ public void valueChanged(ListSelectionEvent event)
{ int s=style[styleList.getSelectedIndex()];
styleText.setText(fontStyle[s]);
styleText.selectAll();
Font sampleFont2=new Font(fontText.getText(),style[styleList.getSelectedIndex()],Integer.parseInt(sizeText.getText()));
sample.setFont(sampleFont2);
}
});
sizeList.addListSelectionListener(new ListSelectionListener()
{ public void valueChanged(ListSelectionEvent event)
{ sizeText.setText(fontSize[sizeList.getSelectedIndex()]);
//sizeText.requestFocus();
sizeText.selectAll();
Font sampleFont3=new Font(fontText.getText(),style[styleList.getSelectedIndex()],Integer.parseInt(sizeText.getText()));
sample.setFont(sampleFont3);
}
});
okButton.addActionListener(new ActionListener()
{ public void actionPerformed(ActionEvent e)
{ Font okFont=new Font(fontText.getText(),style[styleList.getSelectedIndex()],Integer.parseInt(sizeText.getText()));
editArea.setFont(okFont);
fontDialog.dispose();
}
});
JPanel samplePanel=new JPanel();
samplePanel.setBorder(BorderFactory.createTitledBorder("示例"));
samplePanel.add(sample);
JPanel panel1=new JPanel();
JPanel panel2=new JPanel();
JPanel panel3=new JPanel();
panel2.add(fontText);
panel2.add(styleText);
panel2.add(sizeText);
panel2.add(okButton);
panel3.add(new JScrollPane(fontList));
panel3.add(new JScrollPane(styleList));
panel3.add(new JScrollPane(sizeList));
panel3.add(cancel);
con.add(panel1);
con.add(panel2);
con.add(panel3);
con.add(samplePanel);
fontDialog.setSize(350,340);
fontDialog.setLocation(200,200);
fontDialog.setResizable(false);
fontDialog.setVisible(true);
}
public void actionPerformed(ActionEvent e)
{ //新建
if(e.getSource()==fileMenu_New)
{ editArea.requestFocus();
String currentValue=editArea.getText();
boolean isTextChange=(currentValue.equals(oldValue))?false:true;
if(isTextChange)
{ int saveChoose=JOptionPane.showConfirmDialog(this,"您的文件尚未保存，是否保存？","提示",JOptionPane.YES_NO_CANCEL_OPTION);
if(saveChoose==JOptionPane.YES_OPTION)
{ String str=null;
JFileChooser fileChooser=new JFileChooser();
fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
//fileChooser.setApproveButtonText("确定");
fileChooser.setDialogTitle("另存为");
int result=fileChooser.showSaveDialog(this);
if(result==JFileChooser.CANCEL_OPTION)
{ statusLabel.setText("您没有选择任何文件");
return;
}
File saveFileName=fileChooser.getSelectedFile();
if(saveFileName==null || saveFileName.getName().equals(""))
{ JOptionPane.showMessageDialog(this,"不合法的文件名","不合法的文件名",JOptionPane.ERROR_MESSAGE);
}
else
{ try
{ FileWriter fw=new FileWriter(saveFileName);
BufferedWriter bfw=new BufferedWriter(fw);
bfw.write(editArea.getText(),0,editArea.getText().length());
bfw.flush();//刷新该流的缓冲
bfw.close();
isNewFile=false;
currentFile=saveFileName;
oldValue=editArea.getText();
this.setTitle(saveFileName.getName()+" - 记事本");
statusLabel.setText("当前打开文件："+saveFileName.getAbsoluteFile());
}
catch (IOException ioException)
{
}
}
}
else if(saveChoose==JOptionPane.NO_OPTION)
{ editArea.replaceRange("",0,editArea.getText().length());
statusLabel.setText(" 新建文件");
this.setTitle("无标题 - 记事本");
isNewFile=true;
undo.discardAllEdits(); //撤消所有的"撤消"操作
editMenu_Undo.setEnabled(false);
oldValue=editArea.getText();
}
else if(saveChoose==JOptionPane.CANCEL_OPTION)
{ return;
}
}
else
{ editArea.replaceRange("",0,editArea.getText().length());
statusLabel.setText(" 新建文件");
this.setTitle("无标题 - 记事本");
isNewFile=true;
undo.discardAllEdits();//撤消所有的"撤消"操作
editMenu_Undo.setEnabled(false);
oldValue=editArea.getText();
}
}//新建结束
