JAVA记事本源代码
import java.awt.*;
import java.awt.event.*;
import java.text.*;
import java.util.*;
import java.io.*;
import javax.swing.undo.*;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.datatransfer.*;
import java.util.List;
public class Notepad4 extends JFrame implements ActionListener, DocumentListener {
JMenu mFile, mEdit, mMode, mView, mHelp;
---文件菜单
JMenuItem mFile_New, mFile_Open, mFile_Save, mFile_ASave, mFile_Print, mFile_Exit; ---编辑菜单
JMenuItem mEdit_Undo, mEdit_Cut, mEdit_Copy, mEdit_Paste, mEdit_Del, mEdit_Search, mEdit_SearchNext, mEdit_Replace, mEdit_Turnto, mEdit_SelectAll, mEdit_TimeDate; ---格式菜单
JCheckBoxMenuItem formatMenu_LineWrap;
JMenu formatMenu_Color;
JMenuItem formatMenu_Font, formatMenu_Color_FgColor, formatMenu_Color_BgColor; ---查看菜单
JCheckBoxMenuItem viewMenu_Status;
---帮助菜单
JMenuItem mHelp_HelpTopics, mHelp_About;
---弹出菜单级菜单项
JPopupMenu popupMenu;
JMenuItem popupMenu_Undo, popupMenu_Cut, popupMenu_Copy, popupMenu_Paste, popupMenu_Delete, popupMenu_SelectAll;
---工具栏按钮
JButton newButton, openButton, saveButton, saveAsButton, printButton, undoButton, redoButton, cutButton, copyButton, pasteButton, deleteButton, searchButton, timeButton, fontButton, boldButton,
italicButton, fgcolorButton, bgcolorButton, ;
文本编辑区域
static JTextArea Text;
状态栏标签
JLabel statusLabel1, statusLabel2, statusLabel3;
JToolBar statusBar;
---系统剪贴板
Toolkit toolKit = Toolkit.getDefaultToolkit();
Clipboard clipBoard = toolKit.getSystemClipboard();
---创建撤消操作管理器
protected UndoManager undo = new UndoManager();
protected UndoableEditListener undoHandler = new UndoHandler();
----其它变量
boolean isNewFile = true; 是否新文件(未保存过的)
File currentFile; 当前文件名
String oldValue; 存放编辑区原来的内容，用于比较文本是否有改动
JButton fontOkButton; 字体设置里的"确定"按钮
----设置编辑区默认字体
protected Font defaultFont = new Font("宋体", Font.PLAIN, 12); GregorianCalendar time = new GregorianCalendar();
int = time.get(Calendar.MINUTE);
int second = time.get(Calendar.SECOND);
File saveFileName = null, fileName = null;
public Notepad4() {
super("VXBB的记事本");
setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
Container container = getContentPane();
System.out.println(Text.getDragEnabled()); 支持自动拖放
JScrollPane scroll = new JScrollPane(Text);
scroll.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS); scroll.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); Text.setWrapStyleWord(true); 设置单词在一行不足容纳时换行
Text.setLineWrap(true);
Text.setFont(defaultFont); 设置编辑区默认字体
Text.setBackground(Color.white); 设置编辑区默认背景色
Text.setForeground(Color.black); 设置编辑区默认前景色
oldValue = Text.getText(); 获取原文本编辑区的内容
--编辑区注册事件监听
Text.getDocument().addUndoableEditListener(undoHandler); 添加负责通知任何更改的撤消侦听器
Text.getDocument().addDocumentListener(this); 添加负责通知任何更改的文档侦听器JMenuBar MenuBar = new JMenuBar();
mFile = new JMenu("文件(F)", true); 创建菜单
mEdit = new JMenu("编辑(E)", true);
mMode = new JMenu("格式(O)", true);
mView = new JMenu("查看(V)", true);
mHelp = new JMenu("帮助(H)", true);
mEdit.addActionListener(new ActionListener() 注册事件监听
{
public void actionPerformed(ActionEvent e) { checkMenuItemEnabled(); 设置剪切、复制、粘贴、删除等功能的可用性}
});
mFile.setMnemonic('F');
mEdit.setMnemonic('E');
mMode.setMnemonic('O');
mView.setMnemonic('V');
mHelp.setMnemonic('H');
MenuBar.add(mFile);
MenuBar.add(mEdit);
MenuBar.add(mMode);
MenuBar.add(mView);
MenuBar.add(mHelp);
--文件菜单
mFile_New = new JMenuItem("新建(N)", 'N');
mFile_Open = new JMenuItem("打开(O)", 'O');
mFile_Save = new JMenuItem("保存(S)", 'S');
mFile_ASave = new JMenuItem("另存为(A)", 'A');
mFile_Print = new JMenuItem("打印(P)", 'P');
mFile_Exit = new JMenuItem("退出(X)", 'X');
mFile_New.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, InputEvent.CTRL_MASK));
mFile_Open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, InputEvent.CTRL_MASK));
mFile_Save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, InputEvent.CTRL_MASK));
mFile_Print.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P, InputEvent.CTRL_MASK));
mFile_New.addActionListener(this); 注册事件监听
mFile_Open.addActionListener(this);
mFile_Save.addActionListener(this);
mFile_ASave.addActionListener(this);
mFile_Print.addActionListener(this);
mFile_Exit.addActionListener(this);
mFile.add(mFile_New); 添加菜单项
mFile.add(mFile_Open);
mFile.add(mFile_Save);
mFile.add(mFile_ASave);
mFile.addSeparator(); 添加分割线
mFile.add(mFile_Print);
mFile.addSeparator(); 添加分割线
mFile.add(mFile_Exit);
--编辑菜单
mEdit_Undo = new JMenuItem("撤消(U)", 'U');
mEdit_Cut = new JMenuItem("剪切(T)", 'T');
mEdit_Copy = new JMenuItem("复制(C)", 'C');
mEdit_Paste = new JMenuItem("粘贴(P)", 'P');
mEdit_Del = new JMenuItem("删除(L)", 'L');
mEdit_Search = new JMenuItem("查找(F)", 'F');
mEdit_SearchNext = new JMenuItem("查找下一个(N)", 'N');
mEdit_Replace = new JMenuItem("替换(R)", 'R');
mEdit_Turnto = new JMenuItem("转到(G)", 'G');
mEdit_SelectAll = new JMenuItem("全选(A)", 'A');
mEdit_TimeDate = new JMenuItem("时间日期(D)", 'D');
mEdit_Cut.setEnabled(false);
mEdit_Undo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z, InputEvent.CTRL_MASK));
mEdit_Cut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,
InputEvent.CTRL_MASK));
mEdit_Copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, InputEvent.CTRL_MASK));
mEdit_Paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, InputEvent.CTRL_MASK));
mEdit_Del.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE, 0)); mEdit_Search.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F, InputEvent.CTRL_MASK));
mEdit_SearchNext.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F3, 0)); mEdit_Replace.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_H, InputEvent.CTRL_MASK));
mEdit_Turnto.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_G, InputEvent.CTRL_MASK));
mEdit_SelectAll.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A, InputEvent.CTRL_MASK));
mEdit_TimeDate.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F5, 0)); mEdit_Undo.addActionListener(this); 注册事件监听
mEdit_Cut.addActionListener(this);
mEdit_Copy.addActionListener(this);
mEdit_Paste.addActionListener(this);
mEdit_Del.addActionListener(this);
mEdit_Search.addActionListener(this);
mEdit_SearchNext.addActionListener(this);
mEdit_Replace.addActionListener(this);
mEdit_Turnto.addActionListener(this);
mEdit_SelectAll.addActionListener(this);
mEdit_TimeDate.addActionListener(this);
mEdit.add(mEdit_Undo); 添加菜单项
mEdit.addSeparator(); 添加分割线
mEdit.add(mEdit_Cut);
mEdit.add(mEdit_Copy);
mEdit.add(mEdit_Paste);
mEdit.add(mEdit_Del);
mEdit.addSeparator();
mEdit.add(mEdit_Search);
mEdit.add(mEdit_SearchNext);
mEdit.add(mEdit_Replace);
mEdit.add(mEdit_Turnto);
mEdit.addSeparator();
mEdit.add(mEdit_SelectAll);
mEdit.add(mEdit_TimeDate);
--格式菜单
formatMenu_LineWrap = new JCheckBoxMenuItem("自动换行(W)"); formatMenu_LineWrap.setMnemonic('W');
formatMenu_LineWrap.setState(true);
formatMenu_Font = new JMenuItem("字体(F)", 'F'); formatMenu_Color = new JMenu("颜色");
formatMenu_Color_FgColor = new JMenuItem("字体颜色"); formatMenu_Color_BgColor = new JMenuItem("背景颜色"); formatMenu_LineWrap.addActionListener(this); 注册事件监听formatMenu_Font.addActionListener(this);
formatMenu_Color_FgColor.addActionListener(this); formatMenu_Color_BgColor.addActionListener(this);
mMode.add(formatMenu_LineWrap); 添加菜单项
mMode.addSeparator();
mMode.add(formatMenu_Font);
mMode.add(formatMenu_Color);
formatMenu_Color.add(formatMenu_Color_FgColor);
formatMenu_Color.add(formatMenu_Color_BgColor);
--查看菜单
viewMenu_Status = new JCheckBoxMenuItem("状态栏(S)"); viewMenu_Status.setMnemonic('S');
viewMenu_Status.setState(true);
viewMenu_Status.addActionListener(this);
mView.add(viewMenu_Status);
--帮助菜单
mHelp_HelpTopics = new JMenuItem("帮助(H)", 'H');
mHelp_About = new JMenuItem("关于(A)", 'A');
mHelp_HelpTopics.addActionListener(this);
mHelp_About.addActionListener(this);
mHelp.add(mHelp_HelpTopics);
mHelp.addSeparator(); 添加分割线
mHelp.add(mHelp_About);
创建右键弹出菜单
popupMenu = new JPopupMenu();
popupMenu_Undo = new JMenuItem("撤消(U)", 'U');
popupMenu_Cut = new JMenuItem("剪切(T)", 'T');
popupMenu_Copy = new JMenuItem("复制(C)", 'C');
popupMenu_Paste = new JMenuItem("粘贴(P)", 'P');
popupMenu_Delete = new JMenuItem("删除(D)", 'D');
popupMenu_SelectAll = new JMenuItem("全选(A)", 'A');
popupMenu_Undo.setEnabled(false); 撤消选项初始设为不可用
---向右键菜单添加菜单项和分隔符
popupMenu.add(popupMenu_Undo);
popupMenu.addSeparator();
popupMenu.add(popupMenu_Cut);
popupMenu.add(popupMenu_Copy);
popupMenu.add(popupMenu_Paste);
popupMenu.add(popupMenu_Delete);
popupMenu.addSeparator();
popupMenu.add(popupMenu_SelectAll);
右键菜单注册事件
popupMenu_Undo.addActionListener(this);
popupMenu_Cut.addActionListener(this);
popupMenu_Copy.addActionListener(this);
popupMenu_Paste.addActionListener(this);
popupMenu_Delete.addActionListener(this);
popupMenu_SelectAll.addActionListener(this);
文本编辑区注册右键菜单事件
Text.addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
checkForTriggerEvent(e);
}
public void mouseReleased(MouseEvent e) {
checkForTriggerEvent(e);
}
private void checkForTriggerEvent(MouseEvent e) {
if (e.isPopupTrigger())
popupMenu.show(e.getComponent(), e.getX(), e.getY()); 在组件调用者的坐标空间中的位置
X、Y
显示弹出菜单。
else {
statusLabel3.setText("当前光标所在行数: " + getlineNumber());
}
checkMenuItemEnabled(); 设置剪切、复制、粘贴、删除等功能的可用性Text.requestFocus(); 编辑区获取焦点
}
});
----创建工具栏
JPanel toolBar = new JPanel();
toolBar.setLayout(new FlowLayout(FlowLayout.LEFT));
Icon newIcon = new ImageIcon("Iconsnew.gif");
Icon openIcon = new ImageIcon("Iconsopen.gif");
Icon saveIcon = new ImageIcon("Iconssave.gif");
Icon saveAsIcon = new ImageIcon("Iconssaveas.gif");
Icon printIcon = new ImageIcon("Iconsprint.gif");
Icon undoIcon = new ImageIcon("Iconsundo.gif");
Icon cutIcon = new ImageIcon("Iconscut.gif");
Icon copyIcon = new ImageIcon("Iconscopy.gif");
Icon pasteIcon = new ImageIcon("Iconspaste.gif");
Icon deleteIcon = new ImageIcon("Iconsdelete.gif");
Icon searchIcon = new ImageIcon("Iconssearch.gif");
Icon timeIcon = new ImageIcon("Iconstime.gif");
Icon fontIcon = new ImageIcon("Iconsfont.gif");
Icon boldIcon = new ImageIcon("Iconsbold.gif");
Icon italicIcon = new ImageIcon("Iconsitalic.gif");
Icon bgcolorIcon = new ImageIcon("Iconsbgcolor.gif");
Icon fgcolorIcon = new ImageIcon("Iconsfgcolor.gif");
Icon = new ImageIcon("Icons = new JButton(newIcon);
openButton = new JButton(openIcon);
saveButton = new JButton(saveIcon);
saveAsButton = new JButton(saveAsIcon);
printButton = new JButton(printIcon);
undoButton = new JButton(undoIcon);
undoButton.setEnabled(false);
cutButton = new JButton(cutIcon);
cutButton.setEnabled(false);
copyButton = new JButton(copyIcon);
copyButton.setEnabled(false);
pasteButton = new JButton(pasteIcon);
pasteButton.setEnabled(false);
deleteButton = new JButton(deleteIcon);
deleteButton.setEnabled(false);
searchButton = new JButton(searchIcon);
timeButton = new JButton(timeIcon);
fontButton = new JButton(fontIcon);
boldButton = new JButton(boldIcon);
italicButton = new JButton(italicIcon);
fgcolorButton = new JButton(fgcolorIcon); bgcolorButton = new JButton(bgcolorIcon);
= new JButton();
newButton.setPreferredSize(new Dimension(22, 22)); openButton.setPreferredSize(new Dimension(22, 22)); saveButton.setPreferredSize(new Dimension(22, 22)); saveAsButton.setPreferredSize(new Dimension(22, 22)); printButton.setPreferredSize(new Dimension(22, 22)); undoButton.setPreferredSize(new Dimension(22, 22)); cutButton.setPreferredSize(new Dimension(22, 22)); copyButton.setPreferredSize(new Dimension(22, 22)); pasteButton.setPreferredSize(new Dimension(22, 22)); deleteButton.setPreferredSize(new Dimension(22, 22)); searchButton.setPreferredSize(new Dimension(22, 22)); timeButton.setPreferredSize(new Dimension(22, 22)); fontButton.setPreferredSize(new Dimension(22, 22)); boldButton.setPreferredSize(new Dimension(22, 22)); italicButton.setPreferredSize(new Dimension(22, 22)); fgcolorButton.setPreferredSize(new Dimension(22, 22)); bgcolorButton.setPreferredSize(new Dimension(22, 22)); .setPreferredSize(new Dimension(22, 22));
注册工具栏按钮事件
newButton.addActionListener(this);
openButton.addActionListener(this);
saveButton.addActionListener(this);
saveAsButton.addActionListener(this);
printButton.addActionListener(this);
undoButton.addActionListener(this);
cutButton.addActionListener(this);
copyButton.addActionListener(this);
pasteButton.addActionListener(this);
deleteButton.addActionListener(this);
searchButton.addActionListener(this);
timeButton.addActionListener(this);
fontButton.addActionListener(this);
boldButton.addActionListener(this);
italicButton.addActionListener(this);
fgcolorButton.addActionListener(this);
bgcolorButton.addActionListener(this);
.addActionListener(this);
设置按钮提示文字
newButton.setToolTipText("新建");
openButton.setToolTipText("打开");
saveButton.setToolTipText("保存");
saveAsButton.setToolTipText("另存为");
printButton.setToolTipText("打印");
undoButton.setToolTipText("撤消");
cutButton.setToolTipText("剪切");
copyButton.setToolTipText("复制");
pasteButton.setToolTipText("粘贴");
deleteButton.setToolTipText("删除所选");
searchButton.setToolTipText("查找与替换");
timeButton.setToolTipText("插入时间日期");
fontButton.setToolTipText("设置字体");
boldButton.setToolTipText("粗体");
italicButton.setToolTipText("斜体");
fgcolorButton.setToolTipText("设置字体颜色");
bgcolorButton.setToolTipText("设置背景颜色");
.setToolTipText("帮助");
设置撤消、重做、剪切、复制、粘贴、删除等工具栏按钮不可用时的图片(灰色) undoButton.setDisabledIcon(new ImageIcon("Iconsundo1.gif")); cutButton.setDisabledIcon(new ImageIcon("Iconscut1.gif")); copyButton.setDisabledIcon(new ImageIcon("Iconscopy1.gif")); pasteButton.setDisabledIcon(new ImageIcon("Iconspaste1.gif")); deleteButton.setDisabledIcon(new ImageIcon("Iconsdelete1.gif"));
向工具栏添加按钮
toolBar.add(newButton);
toolBar.add(openButton);
toolBar.add(saveButton);
toolBar.add(saveAsButton);
toolBar.add(printButton);
toolBar.add(undoButton);
toolBar.add(cutButton);
toolBar.add(copyButton);
toolBar.add(pasteButton);
toolBar.add(deleteButton);
toolBar.add(searchButton);
toolBar.add(timeButton);
toolBar.add(fontButton);
toolBar.add(boldButton);
toolBar.add(italicButton);
toolBar.add(fgcolorButton);
toolBar.add(bgcolorButton);
toolBar.add();
--向容器添加工具栏
container.add(toolBar, BorderLayout.NORTH);
创建和添加状态栏
statusBar = new JToolBar();
statusBar.setLayout(new FlowLayout(FlowLayout.LEFT));
statusLabel1 = new JLabel("按F1获取帮助 ");
statusLabel2 = new JLabel(" 当前时间：" + + ":" + second);
statusLabel3 = new JLabel(" 当前光标所在行数" + getlineNumber());
statusBar.add(statusLabel1);
statusBar.addSeparator();
statusBar.add(statusLabel2);
statusBar.addSeparator();
statusBar.add(statusLabel3);
container.add(statusBar, BorderLayout.SOUTH);
statusBar.setVisible(true);
改变标题栏窗口左侧默认图标
Toolkit tk = Toolkit.getDefaultToolkit();
Image image = tk.createImage("Iconsnotepad.gif");
this.setIconImage(image);
this.setJMenuBar(MenuBar); 向窗口添加菜单条
container.add(scroll, BorderLayout.CENTER); 向容器添加文本编辑区
this.pack();
this.setSize(800, 800);
this.setVisible(true);
checkMenuItemEnabled();
Text.requestFocus();
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent evt) {
checkText();
}
});
Clock clock = new Clock();
clock.start();
}
public void checkText() {
Text.requestFocus();
String currentValue = Text.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) {
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) {
statusLabel1.setText("您没有选择任何文件");
return;
}
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 {
saveFile();
Text.setText("");
this.setTitle("新建文本");
statusLabel1.setText(" 新建文本");
}
}
else if (saveChoose == JOptionPane.NO_OPTION) {
System.exit(0);
}
else if (saveChoose == JOptionPane.CANCEL_OPTION) {
Text.requestFocus();
}
}
else if (!isTextChange) {
System.exit(0);
}
}
public void checkMenuItemEnabled() {
String selectText = Text.getSelectedText();
if (selectText == null) {
mEdit_Cut.setEnabled(false);
popupMenu_Cut.setEnabled(false);
cutButton.setEnabled(false);
mEdit_Copy.setEnabled(false);
popupMenu_Copy.setEnabled(false);
copyButton.setEnabled(false);
mEdit_Del.setEnabled(false);
popupMenu_Delete.setEnabled(false);
deleteButton.setEnabled(false);
} else {
mEdit_Cut.setEnabled(true);
popupMenu_Cut.setEnabled(true);
cutButton.setEnabled(true);
mEdit_Copy.setEnabled(true);
popupMenu_Copy.setEnabled(true);
copyButton.setEnabled(true);
mEdit_Del.setEnabled(true);
popupMenu_Delete.setEnabled(true);
deleteButton.setEnabled(true);
}
粘贴功能可用性判断
Transferable contents = clipBoard.getContents(this);
if (contents == null) {
mEdit_Paste.setEnabled(false);
popupMenu_Paste.setEnabled(false);
pasteButton.setEnabled(false);
} else {
mEdit_Paste.setEnabled(true);
popupMenu_Paste.setEnabled(true);
pasteButton.setEnabled(true);
}
}
public int getlineNumber() {
int totalLine = Text.getLineCount();
int[] lineNumber = new int[totalLine + 1];
int pos = 0, t = 0, num = 0, i = 0;
String s = Text.getText();
while (true) {
pos = s.indexOf('\12', pos); 返回 \n 所在的位置
if (pos == -1)
break;
lineNumber[t++] = pos++;
}
if (Text.getCaretPosition() <= lineNumber[0])
num = 1;
else {
if (Text.getCaretPosition() > lineNumber[Text.getLineCount() - 1]) num = Text.getLineCount();
for (i = 0; i < totalLine + 1; i++) {
if (Text.getCaretPosition() <= lineNumber[i]) {
num = i + 1;
break;
} else
continue;
}
}
return num;
}
public void saveFile() {
try {
FileWriter fw = new FileWriter(saveFileName);
fw.write(Text.getText());
fw.close();
} catch (Exception e) {
}
}
public void mySearch() {
final JDialog findDialog = new JDialog(this, "查找与替换", true); 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(22);
final JTextField replaceText = new JTextField(22);
final JCheckBox matchcase = new JCheckBox("区分大小写");
ButtonGroup bGroup = new ButtonGroup();
final JRadioButton up = new JRadioButton("向上(U)");
final JRadioButton down = new JRadioButton("向下(D)");
down.setSelected(true);
bGroup.add(up);
bGroup.add(down);
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)");
searchNext.setPreferredSize(new Dimension(110, 22));
replace.setPreferredSize(new Dimension(110, 22));
replaceAll.setPreferredSize(new Dimension(110, 22));
"替换"按钮的事件处理
replace.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (replaceText.getText().length() == 0 && Text.getSelectedText() != null) Text.replaceSelection("");
if (replaceText.getText().length() > 0 && Text.getSelectedText() != null) Text.replaceSelection(replaceText.getText());
}
});
"替换全部"按钮的事件处理
replaceAll.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Text.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 = Text.getCaretPosition();
String str1, str2, str3, str4, strA, strB;
str1 = Text.getText();
str2 = str1.toLowerCase();
str3 = findText.getText();
str4 = str3.toLowerCase();
if (matchcase.isSelected()) {
strA = str1;
strB = str3;
} else {
strA = str2;
strB = str4;
}
if (up.isSelected()) {
if (Text.getSelectedText() == null) {
a = https://www.doczj.com/doc/485741661.html,stIndexOf(strB, FindStartPos - 1);
} else {
a = https://www.doczj.com/doc/485741661.html,stIndexOf(strB, FindStartPos - findText.getText().length() - 1);
}
} else if (down.isSelected()) {
if (Text.getSelectedText() == null) {
a = strA.indexOf(strB, FindStartPos);
} else {
a = strA.indexOf(strB, FindStartPos - findText.getText().length() + 1);
}
}
if (a > -1) {
if (up.isSelected()) {
Text.setCaretPosition(a);
b = findText.getText().length();
Text.select(a, a + b);
} else if (down.isSelected()) {
Text.setCaretPosition(a);
b = findText.getText().length();
Text.select(a, a + b);
}
} else {
if (replaceCount == 0) {
JOptionPane.showMessageDialog(findDialog, "找不到您查找的内容!", "记事本", https://www.doczj.com/doc/485741661.html,RMATION_MESSAGE);
} else {
JOptionPane.showMessageDialog(findDialog, "成功替换" + replaceCount + "个匹配内容!", "替换成功", https://www.doczj.com/doc/485741661.html,RMATION_MESSAGE);
}
}
if (replaceText.getText().length() == 0 && Text.getSelectedText() != null) { Text.replaceSelection("");
replaceCount++;
}
if (replaceText.getText().length() > 0 && Text.getSelectedText() != null) { Text.replaceSelection(replaceText.getText());
replaceCount++;
}
} end while
}
}); * "替换全部"按钮的事件处理结束 *
"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 = Text.getCaretPosition();
String str1, str2, str3, str4, strA, strB;
str1 = Text.getText();
str2 = str1.toLowerCase();
str3 = findText.getText();
str4 = str3.toLowerCase();
"区分大小写"的CheckBox被选中
if (matchcase.isSelected()) {
strA = str1;
strB = str3;
} else {
strA = str2;
strB = str4;
}
if (up.isSelected()) {
if (Text.getSelectedText() == null) {
a = https://www.doczj.com/doc/485741661.html,stIndexOf(strB, FindStartPos - 1);
} else {
a = https://www.doczj.com/doc/485741661.html,stIndexOf(strB, FindStartPos - findText.getText().length() - 1);
}
} else if (down.isSelected()) {
if (Text.getSelectedText() == null) {
a = strA.indexOf(strB, FindStartPos);
} else {
a = strA.indexOf(strB, FindStartPos - findText.getText().length() + 1);
}
}
if (a > -1) {
if (up.isSelected()) {
Text.setCaretPosition(a);
b = findText.getText().length();
Text.select(a, a + b);
} else if (down.isSelected()) {
Text.setCaretPosition(a);
b = findText.getText().length();
Text.select(a, a + b);
}
} else {
JOptionPane.showMessageDialog(null, "找不到您查找的内容!", "记事本", https://www.doczj.com/doc/485741661.html,RMATION_MESSAGE);
}
}
});* "查找下一个"按钮事件处理结束 *
"取消"按钮及事件处理
JButton cancel = new JButton("取消");
cancel.setPreferredSize(new Dimension(110, 22));
cancel.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
findDialog.dispose();
}
});
创建"查找与替换"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);
direction.setPreferredSize(new Dimension(170, 60));
JPanel replacePanel = new JPanel();
replacePanel.setLayout(new GridLayout(2, 1));
replacePanel.add(replace);
replacePanel.add(replaceAll);
topPanel.add(searchContentLabel);
topPanel.add(findText);
topPanel.add(searchNext);
centerPanel.add(replaceContentLabel);
centerPanel.add(replaceText);
centerPanel.add(replacePanel);
bottomPanel.add(matchcase);
bottomPanel.add(direction);
bottomPanel.add(cancel);
con.add(topPanel);
con.add(centerPanel);
con.add(bottomPanel);
设置"查找与替换"对话框的大小、可更改大小(否)、位置和可见性
findDialog.setSize(410, 210);
findDialog.setResizable(false);
findDialog.setLocation(230, 280);
findDialog.setVisible(true);
}
* 方法mySearch()结束 *
实现ActionListener的事件处理方法public void actionPerformed(ActionEvent e) public void actionPerformed(ActionEvent e) {
新建
if (e.getActionCommand().equals("新建(N)") || e.getSource() == newButton)
最初发生 Event 的对象
if(e.getSource()==mFile_New||e.getSource()==newButton)
{
Text.requestFocus();
String currentValue = Text.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) {
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) {
statusLabel1.setText("您没有选择任何文件");
return;
}
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 {
saveFile();
Text.setText("");
this.setTitle("新建文本");
statusLabel1.setText(" 新建文本");
}
} else if (saveChoose == JOptionPane.NO_OPTION) {
Text.replaceRange("", 0, Text.getText().length());
statusLabel1.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
mEdit_Undo.setEnabled(false);
popupMenu_Undo.setEnabled(false);
undoButton.setEnabled(false);
redoButton.setEnabled(false);
oldValue = Text.getText();
} else if (saveChoose == JOptionPane.CANCEL_OPTION) {
return;
}
} else {
Text.replaceRange("", 0, Text.getText().length());
Text.setText("");
statusLabel1.setText(" 新建文件");
this.setTitle("无标题 - 记事本");
isNewFile = true;
undo.discardAllEdits();
mEdit_Undo.setEnabled(false);
popupMenu_Undo.setEnabled(false);
undoButton.setEnabled(false);
oldValue = Text.getText();
}
} 新建处理结束
打开
else if (e.getActionCommand().equals("打开(O)") || e.getSource() == openButton) { Text.requestFocus();
String currentValue = Text.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) {
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) {
statusLabel1.setText("您没有选择任何文件");
return;
}
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 {
saveFile();
isNewFile = false;
currentFile = saveFileName;
oldValue = Text.getText();
this.setTitle(saveFileName.getName() + " - 记事本");
statusLabel1.setText(" 当前打开文件:" + saveFileName.getAbsoluteFile());
}
} else if (saveChoose == JOptionPane.NO_OPTION) {
String str = null;
JFileChooser fileChooser = new JFileChooser();
fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
fileChooser.setApproveButtonText("确定");
fileChooser.setDialogTitle("打开文件");
int result = fileChooser.showOpenDialog(this);
if (result == JFileChooser.CANCEL_OPTION) {
statusLabel1.setText("您没有选择任何文件");
return;
}
fileName = fileChooser.getSelectedFile();
if (fileName == null || fileName.getName().equals(""))
JOptionPane.showMessageDialog(this, "不合法的文件名", "不合法的文件名", JOptionPane.ERROR_MESSAGE);
else {
try {
FileReader fr = new FileReader(fileName);
BufferedReader bfr = new BufferedReader(fr);
Text.setText("");
while ((str = bfr.readLine()) != null) { 每次读取一行，直到文件结束
Text.append(str + "\15\12");
} endwhile
this.setTitle(fileName.getName() + " - 记事本");
statusLabel1.setText(" 当前打开文件:" + fileName.getAbsoluteFile());
fr.close();
isNewFile = false;
currentFile = fileName;
oldValue = Text.getText();
} catch (IOException ioException) {
}
}
} else {
return;
}
}
else {
String str = null;
JFileChooser fileChooser = new JFileChooser();
fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
fileChooser.setApproveButtonText("确定");
fileChooser.setDialogTitle("打开文件");
int result = fileChooser.showOpenDialog(this);
if (result == JFileChooser.CANCEL_OPTION) {
statusLabel1.setText(" 您没有选择任何文件");
return;
}
fileName = fileChooser.getSelectedFile();
if (fileName == null || fileName.getName().equals(""))
JOptionPane.showMessageDialog(this, "不合法的文件名", "不合法的文件名", JOptionPane.ERROR_MESSAGE);
else {
try {
FileReader fr = new FileReader(fileName);
BufferedReader bfr = new BufferedReader(fr);
Text.setText("");
while ((str = bfr.readLine()) != null) { 每次读取一行，直到文件结束
Text.append(str + "\15\12");
} endwhile
this.setTitle(fileName.getName() + " - 记事本");
statusLabel1.setText(" 当前打开文件:" + fileName.getAbsoluteFile());
fr.close();
isNewFile = false;
currentFile = fileName;
oldValue = Text.getText();
} catch (IOException ioException) {
}