实例介绍
【实例简介】附件包括报告，java源代码。工程文件夹名字叫NotePad，导入选择这个文件夹就可以运行整个文件，编译器是MyEclipse。
这是一个入门级示例，适合新手
【实例截图】
【核心代码】
import Dialog.AboutDialog;
import Dialog.MyFontDialog;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.Calendar;
import javax.swing.JFrame;
public class NotePad extends JFrame implements ActionListener{
private String m_strDirectory=null;
private String m_strFile=null;
boolean isselect=false;
boolean isChange = false;
boolean isupselect=false;
boolean wasChange = false;
String btext=null;
boolean btupdown=false;
Font wasFont=new Font("宋体",Font.PLAIN,24);
String wasText=null;
String isText=null;
JMenuBar menuBar = new JMenuBar();
static Dimension screen=Toolkit.getDefaultToolkit().getScreenSize();
JOptionPane helpAbout=new JOptionPane();
FileDialog Opentext=new FileDialog(this,"文件打开",FileDialog.LOAD);
FileDialog Savetext=new FileDialog(this,"文件保存",FileDialog.SAVE);
JPopupMenu fileAreaPopupMenu=new JPopupMenu();
JMenuItem fileAreaPopupMenuUndo = new JMenuItem("撒消(U)");
JMenuItem fileAreaPopupMenuCut = new JMenuItem("剪切(E)");
JMenuItem fileAreaPopupMenuCopy = new JMenuItem("复制(C)");
JMenuItem fileAreaPopupMenuPaste = new JMenuItem("粘贴(P)");
JMenuItem fileAreaPopupMenuDelete = new JMenuItem("删除(L)");
JMenuItem fileAreaPopupMenuSelectAll=new JMenuItem("全选(A)");
JMenu menuFile = new JMenu("文件(F)");
JMenuItem menuFileNew = new JMenuItem("新建(N) ");
JMenuItem menuFileOpen = new JMenuItem("打开(O) ");
JMenuItem menuFileSave = new JMenuItem("保存(S) ");
JMenuItem menuFileSaveAs = new JMenuItem("另存为(A) ");
JMenuItem menuFileExit = new JMenuItem("退出(X) ");
JMenu menuEdit = new JMenu("编辑(E)");
JMenuItem menuEditundo = new JMenuItem("撒消(U)");
JMenuItem menuEditCut = new JMenuItem("剪切(T)");
JMenuItem menuEditCopy = new JMenuItem("复制(C)");
JMenuItem menuEditPaste = new JMenuItem("粘贴(P)");
JMenuItem menuEditDelete = new JMenuItem("删除(L)");
JMenuItem menuEditFind = new JMenuItem("查找(F)");
JMenuItem menuEditFindNext = new JMenuItem("查找下一个(N)");
JMenuItem menuEditReplace = new JMenuItem("替换(R)");
JMenuItem menuEditSelectAll=new JMenuItem("全选(A)");
JMenuItem menuEditTimeDate=new JMenuItem("时间/日期(D)");
JMenu menuFormat =new JMenu("格式(O)");
JCheckBoxMenuItem menuFormatLine=new JCheckBoxMenuItem("自行换行(W)",false);
JMenuItem menuFormatfont=new JMenuItem("字体(F)");
JMenu menuHelp =new JMenu("帮助(H)");
JMenuItem menuHelpFind=new JMenuItem("查看帮助(H)");
JMenuItem menuHelpAbout=new JMenuItem("关于记事本(A)");
Container panel =getContentPane();
JTextArea fileArea = new JTextArea();
JScrollPane gdt=new JScrollPane(fileArea);
public NotePad() {
this.setTitle("记事本");
Toolkit tool = this.getToolkit();// 窗口图标！
Image myimage = tool.getImage("");
this.setIconImage(myimage);
setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
exit();
}
});
fileArea.getDocument().addDocumentListener(new FileAeraListener());
fileArea.setFont(wasFont);
//---------------------------菜单栏------------------------------//
menuBar.add(menuFile);
menuFile.setMnemonic('F');
menuBar.add(menuEdit);
menuEdit.setMnemonic('E');
menuBar.add(menuFormat);
menuFormat.setMnemonic('O');
menuBar.add(menuHelp);
menuHelp.setMnemonic('H');
//-----------------------------文件-------------------------------//
menuFile.add(menuFileNew); //新建
menuFileNew.setMnemonic('N');
menuFile.add(menuFileOpen); //打开
menuFileOpen.setMnemonic('O');// 访问健;
menuFileOpen.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,
InputEvent.CTRL_MASK));// 快捷健;
menuFile.add(menuFileSave); //保存
menuFileSaveAs.setMnemonic('A');
menuFile.add(menuFileSaveAs); //另保存
menuFileSave.setMnemonic('S');
menuFileSave.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,
InputEvent.CTRL_MASK));
menuFile.addSeparator();
menuFile.add(menuFileExit); //退出
menuFileExit.setMnemonic('X');
//-----------------------编辑--------------------------//
menuEdit.add(menuEditundo); //撤销
menuEditundo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z,
InputEvent.CTRL_MASK));
menuEditundo.setMnemonic('U');
menuEdit.addSeparator();
menuEdit.add(menuEditCut); //剪切
menuEditCut.setMnemonic('T');
menuEditCut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,
InputEvent.CTRL_MASK));
menuEditCopy.setMnemonic('C');
menuEdit.add(menuEditCopy); //复制
menuEditCopy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,
InputEvent.CTRL_MASK));
menuEdit.add(menuEditPaste); //粘贴
menuEditPaste.setMnemonic('P');
menuEditPaste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,
InputEvent.CTRL_MASK));
menuEditDelete.setMnemonic('L');
menuEdit.add(menuEditDelete); //删除
menuEditDelete.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE,
InputEvent.CTRL_MASK));
menuEdit.addSeparator();
menuEditFind.setMnemonic('F');
menuEdit.add(menuEditFind); //查找
menuEditFind.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F,
InputEvent.CTRL_MASK));
menuEditFindNext.setMnemonic('N');
menuEdit.add(menuEditFindNext); //查找下一个
menuEditFindNext.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F3,
Event.ALT_MASK));
menuEditReplace.setMnemonic('R');
menuEdit.add(menuEditReplace); //替换
menuEditReplace.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_R,
InputEvent.CTRL_MASK));
menuEdit.addSeparator();
menuEditSelectAll.setMnemonic('A');
menuEdit.add(menuEditSelectAll); //全选
menuEditSelectAll.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A,
InputEvent.CTRL_MASK));
menuEdit.add(menuEditTimeDate); //时间/日期
menuEditTimeDate.setMnemonic('D');
menuEditTimeDate.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F5,
Event.ALT_MASK));
//--------------格式------------------------------------//
menuFormatLine.setMnemonic('W');
menuFormat.add(menuFormatLine); //自动换行
menuFormatfont.setMnemonic('F');
menuFormat.add(menuFormatfont); //字体
//--------------帮助-----------------------------------//
menuHelpFind.setMnemonic('H');
menuHelp.add(menuHelpFind); //帮助查找
menuHelpAbout.setMnemonic('A');
menuHelp.add(menuHelpAbout); //关于
//--------------文本区弹出菜单-------------------------//
fileArea.setComponentPopupMenu(fileAreaPopupMenu);
fileArea.add(fileAreaPopupMenu);
fileAreaPopupMenu.add(fileAreaPopupMenuUndo);
fileAreaPopupMenu.addSeparator();
fileAreaPopupMenu.add(fileAreaPopupMenuCut);
fileAreaPopupMenu.add(fileAreaPopupMenuCopy);
fileAreaPopupMenu.add(fileAreaPopupMenuPaste);
fileAreaPopupMenu.add(fileAreaPopupMenuDelete);
fileAreaPopupMenu.addSeparator();
fileAreaPopupMenu.add(fileAreaPopupMenuSelectAll);
//---------------增加各种控件的消息响应------------------//
menuFileNew.addActionListener(this);
menuFileOpen.addActionListener(this);
menuFileSave.addActionListener(this);
menuFileSaveAs.addActionListener(this);
menuFileExit.addActionListener(this);
menuEditundo.addActionListener(this);
menuEditCopy.addActionListener(this);
menuEditCut.addActionListener(this);
menuEditSelectAll.addActionListener(this);
menuEditDelete.addActionListener(this);
menuEditFind.addActionListener(this);
// menuEditFindNext.addActionListener(this);
menuEditReplace.addActionListener(this);
menuEditPaste.addActionListener(this);
menuEditTimeDate.addActionListener(this);
menuFormatLine.addActionListener(this);
menuFormatfont.addActionListener(this);
menuHelpFind.addActionListener(this);
menuHelpAbout.addActionListener(this);
fileAreaPopupMenuUndo.addActionListener(this);
fileAreaPopupMenuCut.addActionListener(this);
fileAreaPopupMenuCopy.addActionListener(this);
fileAreaPopupMenuPaste.addActionListener(this);
fileAreaPopupMenuDelete.addActionListener(this);
fileAreaPopupMenuSelectAll.addActionListener(this);
menuEditFindNext.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(btext==null) Search();
else{
int a = 0, b = 0;
int FindStartPos = fileArea.getCaretPosition();
String str1, str2, str3, str4, strA, strB;
str1 = fileArea.getText();
str2 = str1.toLowerCase();
str3 = btext;
str4 = str3.toLowerCase();
//"区分大小写"的CheckBox被选中
if (isselect) //不区分大小写
{
strA = str1;
strB = str3;
}
else //区分大小写
{
strA = str2;
strB = str4;
}
if (isupselect) //向上搜索
{
if (fileArea.getSelectedText() == null)
{
a = strA.lastIndexOf(strB, FindStartPos - 1);
}
else
{
a = strA.lastIndexOf(strB,fileArea.getSelectionStart()-strB.length()); // FindStartPos-findText.getText().length()-1
}
}
else if (!isupselect)
{
System.out.println("kkkkkkkk");
if (fileArea.getSelectedText() == null)
{
a = strA.indexOf(strB, FindStartPos );
}
else
{
System.out.println("ffffff");
a = strA.indexOf(strB, fileArea.getSelectionEnd() ); //- findText.getText().length() 1
}
}
System.out.println(a);
if (a > -1)
{
if (isupselect)
{
fileArea.setCaretPosition(a);
b = btext.length();
fileArea.select(a, a b);
}
else
{
fileArea.setCaretPosition(a);
b = btext.length();
fileArea.select(a, a b);
}
}
else
{
JOptionPane.showMessageDialog(null, "找不到您查找的内容!", "记事本",
JOptionPane.INFORMATION_MESSAGE);
}
}
}
});
setSize(770, 520);
this.setLocation(300,150);
panel.add(gdt,BorderLayout.CENTER);
setJMenuBar(menuBar);
wasText=fileArea.getText();
}
@Override
public void actionPerformed(ActionEvent e)
{
if (e.getSource()==menuFileNew){ //新建
startNewDocument();
}
else if (e.getSource()==menuFileOpen){ //打开
Open();
}
else if (e.getSource()==menuFileSave){ //保存
save();
}
else if (e.getSource()==menuFileSaveAs){ //另存为
saveAs();
}
else if(e.getSource()==menuFileExit){ //退出
exit();
}
else if(e.getSource()==menuEditundo||e.getSource()==fileAreaPopupMenuUndo){ //撒消
undo();
}
else if(e.getSource()==menuEditCut||e.getSource()==fileAreaPopupMenuCut){ //剪切
fileArea.cut();
}
else if(e.getSource()==menuEditCopy||e.getSource()==fileAreaPopupMenuCopy){ //复制
fileArea.copy();
}
else if(e.getSource()==menuEditPaste||e.getSource()==fileAreaPopupMenuPaste){ //粘贴
fileArea.paste();
}
else if(e.getSource()==menuEditDelete||e.getSource()==fileAreaPopupMenuDelete){ //删除
Delete();
}
else if(e.getSource()==menuEditSelectAll||e.getSource()==fileAreaPopupMenuSelectAll){ //选择全部
selectAll();
}
else if(e.getSource()==menuEditFind){ //查找
Search();
}
else if(e.getSource()==menuEditReplace){ //替换
Replace();
}
else if(e.getSource()==menuEditTimeDate) { //时间/日期
setTimeDate();
}
else if (e.getSource()==menuFormatLine){ //查找
if(menuFormatLine.isSelected()){
fileArea.setLineWrap(true);
}else{
fileArea.setLineWrap(false);
}
}
else if(e.getSource()==menuHelpFind){ //查看帮助
try
{
// String filePath = "C://Windows//winhlp32.exe";
String filePath = "C://Windows//winhlp32.exe";
Runtime.getRuntime().exec("cmd.exe /c " filePath);
}
catch(IOException ee)
{
JOptionPane.showMessageDialog(this,"打开系统的记事本帮助文件出错!","错误信息",JOptionPane.INFORMATION_MESSAGE);
}catch(SecurityException ee){
ee.printStackTrace();
}catch(NullPointerException ee){
ee.printStackTrace();
}catch(IllegalArgumentException ee){
ee.printStackTrace();
}
}
else if(e.getSource()==menuHelpAbout){ //关于记事本
About();
}else if(e.getSource()==menuFormatfont){ //字体
setfont();
}
}
private class FileAeraListener implements DocumentListener{
public void insertUpdate(DocumentEvent e) {
wasChange = isChange;
isChange = true;
isText=fileArea.getText();
}
public void removeUpdate(DocumentEvent e) {
wasChange = isChange;
isChange = true;
isText=fileArea.getText();
}
public void changedUpdate(DocumentEvent e) {
wasChange = isChange;
isChange = true;
isText=fileArea.getText();
}
}
public void startNewDocument()
{
if(isChange){
int decision = JOptionPane.showConfirmDialog(this,
"文件已更改 ！\n"
"是否选择保存？", "注意",
JOptionPane.YES_NO_CANCEL_OPTION,
JOptionPane.WARNING_MESSAGE);
if (decision == JOptionPane.YES_OPTION){ saveDocument();fileArea.setText("");isChange = false;}
else if (decision == JOptionPane.NO_OPTION) fileArea.setText("");
else if (decision == JOptionPane.CANCEL_OPTION);
}
else{
fileArea.setText("");
}
}
public void Open(){
if(isChange){
int decision = JOptionPane.showConfirmDialog(this,
"文件已更改 ！\n"
"是否选择保存？", "注意",
JOptionPane.YES_NO_CANCEL_OPTION,
JOptionPane.WARNING_MESSAGE);
if (decision == JOptionPane.YES_OPTION){ saveDocument();isChange = false;}
else if (decision == JOptionPane.NO_OPTION){openDocument();}
else if (decision == JOptionPane.CANCEL_OPTION);
}
else openDocument();
}
public void openDocument() {
Opentext.setVisible(true);
String Stext=null;
try {
if (Opentext.getFile() != null) {
m_strDirectory =Opentext.getDirectory();
m_strFile=Opentext.getFile();
File f = new File(m_strDirectory m_strFile);
System.out.println(m_strDirectory m_strFile);
FileReader fr = new FileReader(f);
BufferedReader br = new BufferedReader(fr);
String s = br.readLine();
while (s != null) {
if(Stext==null)Stext=s "\n";
else Stext = Stext s "\n";
s = br.readLine();
}
br.close();
fileArea.setText(Stext);
isChange = false;
}
} catch (FileNotFoundException e1) {
System.out.println("File not found: ");
} catch (IOException e2) {
e2.printStackTrace();
}
}
public void saveDocument() {
Savetext.setVisible(true);
BufferedWriter dataOut=null;
try {
if(Savetext.getFile()!=null)
{
String save=Savetext.getFile();
String save2=null;
if(save.length()>3)
{
save2=save.substring(save.length()-4);
}
else{
save2=save;
}
if(save2.equals(".txt"))
{
m_strDirectory=Savetext.getDirectory();
m_strFile=Savetext.getFile();
dataOut=new BufferedWriter(new FileWriter(m_strDirectory m_strFile));
}
else
{
m_strDirectory=Savetext.getDirectory();
m_strFile=Savetext.getFile() ".txt";
dataOut=new BufferedWriter(new FileWriter(m_strDirectory m_strFile));
}
dataOut.write(fileArea.getText());
dataOut.close();
}
} catch (IOException e) {
System.out.println("File not found: ");
}
}
public void save(){
if(m_strFile!=null&&m_strDirectory!=null)
{
try {
BufferedWriter dataout=new BufferedWriter(new FileWriter(m_strDirectory m_strFile));
dataout.write(fileArea.getText());
dataout.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
else saveDocument();
}
public void saveAs()
{
saveDocument();
}
public void Delete()
{
fileArea.replaceRange("", fileArea.getSelectionStart(), fileArea.getSelectionEnd());
}
public void setTimeDate()
{
Calendar c1 =Calendar.getInstance();
int y = c1.get(Calendar.YEAR);
int m = c1.get(Calendar.MONTH);
int d = c1.get(Calendar.DATE);
int h = c1.get(Calendar.HOUR);
int m1 = c1.get(Calendar.MINUTE);
int m2 = m 1;
fileArea.setText(fileArea.getText() h ":" m1 " " y "/" m2 "/" d);
}
public void setfont(){
JFrame notepad;
notepad=new JFrame("Notepad");
MyFontDialog font=new MyFontDialog(notepad,screen.width/2-140,screen.height/2-100);
font.DialogShow();
if(font.getFont()!=null)
{
fileArea.setFont(font.getFont());
}
}
public void Replace(){
final JDialog findDialog = new JDialog(this, "查找与替换", false);
Container con = findDialog.getContentPane();
con.setLayout(new FlowLayout(FlowLayout.LEFT));
JLabel searchContentLabel = new JLabel("查找内容(N) :");
JLabel replaceContentLabel = new JLabel("替换为(P) :");
final JTextField findText = new JTextField(30);
final JTextField replaceText = new JTextField(30);
final JCheckBox matchcase = new JCheckBox("区分大小写(C)");
ButtonGroup bGroup = new ButtonGroup();
final JRadioButton Up = new JRadioButton("向上(U)");
final JRadioButton Down = new JRadioButton("向下(D)");
JButton searchNext = new JButton("查找下一个(F)");
JButton replace = new JButton("替换(R)");
final JButton replaceAll = new JButton("全部替换(A)");
JButton cancel = new JButton("取消");
JLabel Direction=new JLabel("方向");
searchNext.setFont(new Font("宋体",Font.BOLD,10));
Down.setSelected(true); //默认向下搜索
bGroup.add(Up);
bGroup.add(Down);
//"替换"按钮的事件处理
replace.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (replaceText.getText().length() == 0 && fileArea.getSelectedText() != null)
fileArea.replaceSelection("");
if (replaceText.getText().length() > 0 && fileArea.getSelectedText() != null)
fileArea.replaceSelection(replaceText.getText());
}
});
//"替换全部"按钮的事件处理
replaceAll.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
fileArea.setCaretPosition(0); //将光标放到编辑区开头
int a = 0, b = 0, replaceCount = 0;
if (findText.getText().length() == 0)
{
JOptionPane.showMessageDialog(findDialog, "请填写查找内容!", "提示",JOptionPane.WARNING_MESSAGE);
findText.requestFocus(true);
return;
}
while (a > -1)
{
int FindStartPos = fileArea.getCaretPosition();//获取光标位置
String str1, str2, str3, str4, strA, strB;
str1 = fileArea.getText();
str2 = str1.toLowerCase();
str3 = findText.getText();
str4 = str3.toLowerCase();
if (matchcase.isSelected()) //大小写区分
{
strA = str1;
strB = str3;
}
else
{
strA = str2;
strB = str4;
}
if (Up.isSelected()) //向上搜索
{
if (fileArea.getSelectedText() == null)
{
a = strA.lastIndexOf(strB, FindStartPos - 1);
}
else
{
a = strA.lastIndexOf(strB, FindStartPos- findText.getText().length() - 1);
}
}
else //向下搜索
{
if (fileArea.getSelectedText() == null)
{
a = strA.indexOf(strB, FindStartPos);
}
else
{
a = strA.indexOf(strB, FindStartPos- findText.getText().length() 1);
}
}
if (a > -1)
{
if (Up.isSelected())
{
fileArea.setCaretPosition(a);
b = findText.getText().length();
fileArea.select(a, a b);
}
else if (Down.isSelected())
{
fileArea.setCaretPosition(a);
b = findText.getText().length();
fileArea.select(a, a b);
}
}
else
{
if (replaceCount == 0)
{
JOptionPane.showMessageDialog(findDialog,"找不到您查找的内容!", "记事本",JOptionPane.INFORMATION_MESSAGE);
}
else
{
JOptionPane.showMessageDialog(findDialog, "成功替换" replaceCount "个匹配内容!", "替换成功",JOptionPane.INFORMATION_MESSAGE);
}
}
if (replaceText.getText().length() == 0&& fileArea.getSelectedText() != null) //用空字符代替选定内容
{
fileArea.replaceSelection("");
replaceCount ;
}
if (replaceText.getText().length() > 0&& fileArea.getSelectedText() != null) //用指定字符代替选定内容
{
fileArea.replaceSelection(replaceText.getText());
replaceCount ;
}
}//end while
}
});
//"查找下一个"按钮事件处理
searchNext.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int a = 0, b = 0;
int FindStartPos = fileArea.getCaretPosition();
String str1, str2, str3, str4, strA, strB;
str1 = fileArea.getText();
str2 = str1.toLowerCase();
str3 = findText.getText();
str4 = str3.toLowerCase();
//"区分大小写"的CheckBox被选中
if (matchcase.isSelected()) //区分大小写
{
strA = str1;
strB = str3;
}
else //不区分大小写
{
strA = str2;
strB = str4;
}
if (Up.isSelected()) //向上搜索
{
if (fileArea.getSelectedText() == null)
{
a = strA.lastIndexOf(strB, FindStartPos - 1);
}
else
{
a = strA.lastIndexOf(strB, FindStartPos - findText.getText().length() - 1);
}
}
else if (Down.isSelected())
{
if (fileArea.getSelectedText() == null)
{
a = strA.indexOf(strB, FindStartPos);
}
else
{
a = strA.indexOf(strB, FindStartPos - findText.getText().length() 1);
}
}
if (a > -1)
{
if (Up.isSelected())
{
fileArea.setCaretPosition(a);
b = findText.getText().length();
fileArea.select(a, a b);
}
else if (Down.isSelected())
{
fileArea.setCaretPosition(a);
b = findText.getText().length();
fileArea.select(a, a b);
}
}
else
{
JOptionPane.showMessageDialog(null, "找不到您查找的内容!", "记事本",
JOptionPane.INFORMATION_MESSAGE);
}
}
});
//"取消"按钮及事件处理
cancel.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
findDialog.dispose();
}
});
//创建"查找与替换"对话框的界面
findDialog.setSize(390, 160);
findDialog.setResizable(false);
searchNext.setFocusable(false);
replace.setFocusable(false);
replaceAll.setFocusable(false);
matchcase.setFocusable(false);
cancel.setFocusable(false);
Up.setFocusable(false);
Down.setFocusable(false);
bGroup=new ButtonGroup();
findDialog.setLayout(null);
searchContentLabel.setBounds(10,12,80,22);
replaceContentLabel.setBounds(10,42,80,22);
findText.setBounds(95, 12, 160, 22);
replaceText.setBounds(95, 42, 160, 22);
searchNext.setBounds(265, 12, 108, 22);
replace.setBounds(265, 42, 108, 22);
replaceAll.setBounds(265, 72, 108, 22);
cancel.setBounds(265, 102, 108, 22);
Direction.setBounds(10, 72, 80, 22);
matchcase.setBounds(6, 102, 98, 22);
Down.setBounds(95, 72, 80, 22);
Up.setBounds(175, 72, 80, 22);
bGroup.add(Up);
bGroup.add(Down);
findDialog.add(searchContentLabel);
findDialog.add(matchcase);
findDialog.add(findText);
findDialog.add(searchNext);
findDialog.add(Direction);
findDialog.add(replaceContentLabel);
findDialog.add(replaceText);
findDialog.add(replace);
findDialog.add(replaceAll);
findDialog.add(cancel);
findDialog.add(Down);
findDialog.add(Up);
findDialog.setLocation(500, 300);
findDialog.setVisible(true);
}
public void Search(){
final JDialog findDialog = new JDialog(this, "查找下一个", false);
Container con = findDialog.getContentPane();
con.setLayout(new FlowLayout(FlowLayout.LEFT));
JLabel searchContentLabel = new JLabel(" 查找内容(N) :");
final JTextField findText = new JTextField(17);
final JCheckBox matchcase = new JCheckBox("区分大小写(C)");
ButtonGroup bGroup = new ButtonGroup();
final JRadioButton Up = new JRadioButton("向上(U)");
final JRadioButton Down = new JRadioButton("向下(D)");
Down.setSelected(true); //默认向下搜索
bGroup.add(Up);
bGroup.add(Down);
JButton searchNext = new JButton("查找下一个(F)");
//"查找下一个"按钮事件处理
Up.setMnemonic('U');
Down.setMnemonic('D');
searchNext.setMnemonic('F');
searchNext.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int a = 0, b = 0;
int FindStartPos = fileArea.getCaretPosition();
String str1, str2, str3, str4, strA, strB;
str1 = fileArea.getText();
str2 = str1.toLowerCase();
str3 = findText.getText();
btext=str3;
str4 = str3.toLowerCase();
//"区分大小写"的CheckBox被选中
if (matchcase.isSelected()) //不区分大小写
{
isselect=true;
strA = str1;
strB = str3;
}
else //区分大小写
{
isselect=false;
strA = str2;
strB = str4;
}
if (Up.isSelected()) //向上搜索
{
isupselect=true;
if (fileArea.getSelectedText() == null)
{
a = strA.lastIndexOf(strB, FindStartPos - 1);
}
else
{
a = strA.lastIndexOf(strB,fileArea.getSelectionStart()-findText.getText().length()); // FindStartPos-findText.getText().length()-1
}
}
else if (Down.isSelected())
{
isupselect=false;
if (fileArea.getSelectedText() == null)
{
a = strA.indexOf(strB, FindStartPos );
}
else
{
a = strA.indexOf(strB, fileArea.getSelectionEnd() ); //- findText.getText().length() 1
}
}
if (a > -1)
{
if (Up.isSelected())
{
fileArea.setCaretPosition(a);
b = findText.getText().length();
fileArea.select(a, a b);
}
else if (Down.isSelected())
{
fileArea.setCaretPosition(a);
b = findText.getText().length();
fileArea.select(a, a b);
}
}
else
{
JOptionPane.showMessageDialog(null, "找不到您查找的内容!", "记事本",
JOptionPane.INFORMATION_MESSAGE);
}
}
});
//"取消"按钮及事件处理
JButton cancel = new JButton(" 取消 ");
cancel.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
findDialog.dispose();
}
});
//创建"替换"对话框的界面
JPanel bottomPanel = new JPanel();
JPanel centerPanel = new JPanel();
JPanel topPanel = new JPanel();
JPanel direction = new JPanel();
direction.setBorder(BorderFactory.createTitledBorder("方向"));
direction.add(Up);
direction.add(Down);
topPanel.add(searchContentLabel);
topPanel.add(findText);
topPanel.add(searchNext);
bottomPanel.add(matchcase);
bottomPanel.add(direction);
bottomPanel.add(cancel);
con.add(topPanel);
con.add(centerPanel);
con.add(bottomPanel);
//设置"替换"对话框的大小、可更改大小(否)、位置和可见性
findDialog.setSize(425, 200);
findDialog.setResizable(true);
findDialog.setLocation(430, 280);
findDialog.setVisible(true);
}
public void undo(){
String tempText=null;
tempText=isText;
fileArea.setText(wasText);
fileArea.selectAll();
wasText=tempText;
}
public void selectAll()
{
fileArea.selectAll();
}
public void fileExit_actionPerformed(ActionEvent e) {
System.exit(0);
}
public void About(){
JFrame notepad;
notepad=new JFrame("Notepad");
AboutDialog about=new AboutDialog(notepad,screen.width/2-140,screen.height/2-100);
about.Dialog.setVisible(true);
}
public void exit() {
if (isChange == false)
System.exit(1);
else {
int decision = JOptionPane.showConfirmDialog(this,
"文件已更改 ！\n"
"是否选择保存？", "注意",
JOptionPane.YES_NO_CANCEL_OPTION,
JOptionPane.WARNING_MESSAGE);
if (decision == JOptionPane.YES_OPTION) saveDocument();
else if (decision == JOptionPane.NO_OPTION) System.exit(1);
else if (decision == JOptionPane.CANCEL_OPTION);
}
}
public static void main(String arg[]) {
NotePad note = new NotePad();
note.show();
}
}
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