Java仿Windows记事本源代码
先上截图：
源代码：
import java.awt.*;
import javax.swing.*;
import javax.swing.filechooser.FileNameExtensionFilter;
import javax.swing.undo.UndoManager;
import java.awt.event.*;
import java.io.*;
/**
*
* @author [email protected]
* @created 2015年7月6日 上午11:22:24
*/
public class JNotepad extends JFrame implements ActionListener {
JMenuBar menubar = new JMenuBar();
JMenu file = new JMenu("文件(F)");
JMenu edit = new JMenu("编辑(E)");
JMenu format = new JMenu("格式(O)");
JMenu help = new JMenu("帮助(H)");
JMenuItem create = new JMenuItem("新建");
JMenuItem open = new JMenuItem("打开...");
JMenuItem save = new JMenuItem("保存");
JMenuItem saveAs = new JMenuItem("另存为...");
JMenuItem exit = new JMenuItem("退出");
JMenuItem undo = new JMenuItem("撤销");
JMenuItem cut = new JMenuItem("剪切");
JMenuItem copy = new JMenuItem("复制");
JMenuItem paste = new JMenuItem("粘贴");
JMenuItem findRep = new JMenuItem("查找替换");
JMenuItem selectAll = new JMenuItem("全选");
JMenuItem font = new JMenuItem("字体");
JMenuItem about = new JMenuItem("关于");
JMenuItem cut2 = new JMenuItem("剪切(X)");
JMenuItem copy2 = new JMenuItem("复制(C)");
JMenuItem paste2 = new JMenuItem("粘贴(V)");
JMenuItem selectAll2 = new JMenuItem("全选(A)");
public static JTextArea textarea = new JTextArea();
UndoManager um = new UndoManager();
JScrollPane scroll = new JScrollPane(textarea, ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
JPopupMenu popup = new JPopupMenu();
String pathSelect;
// 获取屏幕尺寸
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
public JNotepad() {
// 此处定义键盘快捷键
// MenuBar
file.setMnemonic(KeyEvent.VK_F);
edit.setMnemonic(KeyEvent.VK_E);
format.setMnemonic(KeyEvent.VK_O);
help.setMnemonic(KeyEvent.VK_H);
// MenuItem
create.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, ActionEvent.CTRL_MASK));
open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, ActionEvent.CTRL_MASK));
save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, ActionEvent.CTRL_MASK));
undo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z, ActionEvent.CTRL_MASK));
cut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X, ActionEvent.CTRL_MASK));
copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, ActionEvent.CTRL_MASK));
paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, ActionEvent.CTRL_MASK));
findRep.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F, ActionEvent.CTRL_MASK));
selectAll.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A, ActionEvent.CTRL_MASK));
// 事件监听者
save.addActionListener(this);
create.addActionListener(this);
open.addActionListener(this);
saveAs.addActionListener(this);
exit.addActionListener(this);
undo.addActionListener(this);
cut.addActionListener(this);
copy.addActionListener(this);
paste.addActionListener(this);
selectAll.addActionListener(this);
font.addActionListener(this);
about.addActionListener(this);
cut2.addActionListener(this);
copy2.addActionListener(this);
paste2.addActionListener(this);
selectAll2.addActionListener(this);
findRep.addActionListener(this);
// 设置撤销文本的管理器
textarea.getDocument().addUndoableEditListener(um);
textarea.setFont(Format.font);
// 文件
file.add(create);
file.add(open);
file.add(save);
file.add(saveAs);
file.addSeparator();
file.add(exit);
// 编辑
edit.add(undo);
edit.addSeparator();
edit.add(cut);
edit.add(copy);
edit.add(paste);
edit.addSeparator();
edit.add(findRep);
edit.addSeparator();
edit.add(selectAll);
// 格式
format.add(font);
// 帮助
help.add(about);
// 菜单栏
menubar.add(file);
menubar.add(edit);
menubar.add(format);
menubar.add(help);
// 右键菜单
popup.add(cut2);
popup.add(copy2);
popup.add(paste2);
popup.addSeparator();
popup.add(selectAll2);
// 添加到文本域容器
textarea.add(popup);
// 匿名内部类监听器右键动作
textarea.addMouseListener(new MouseAdapter() {
public void mouseReleased(MouseEvent e) {
if (e.getButton() == MouseEvent.BUTTON3) {
popup.show(textarea, e.getX(), e.getY());
}
}
});
// 边界布局
this.add(menubar, BorderLayout.NORTH);
this.add(scroll, BorderLayout.CENTER);
this.setTitle("记事本");
this.setSize(500, 400);
this.setLocationRelativeTo(null);
this.setIconImage(new ImageIcon(this.getClass().getResource("/icon/notepad.png")).getImage());//图标放在源目录的icon文件夹
this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
this.setVisible(true);
}
// 重写actionPerformed
@Override
public void actionPerformed(ActionEvent e) {
// Event对象发生源
if (e.getSource() == open) {
JFileChooser chooser = new JFileChooser();
FileNameExtensionFilter filter = new FileNameExtensionFilter("文本文档(*.txt)", "txt");
chooser.setFileFilter(filter);
chooser.setDialogTitle("文件打开");
chooser.showOpenDialog(null);
chooser.setVisible(true);
try {
pathSelect = chooser.getSelectedFile().getPath();
FileReader wjl = new FileReader(pathSelect);
BufferedReader hcl = new BufferedReader(wjl);
String s = "", zfc = "";
while ((s = hcl.readLine()) != null) {
zfc += (s + "\n");
}
textarea.setText(zfc);
} catch (Exception e1) {
}
}
if (e.getSource() == saveAs) {// 另存为
JFileChooser chooser = new JFileChooser();
FileNameExtensionFilter filter = new FileNameExtensionFilter("文本文档(*.txt)", "txt");
chooser.setFileFilter(filter);
chooser.setDialogTitle("另存为");
chooser.showSaveDialog(null);
chooser.setVisible(true);
PrintStream ps;
try {
String select = chooser.getSelectedFile().getPath();
ps = new PrintStream(select);
System.setOut(ps);
System.out.println(this.textarea.getText());
} catch (Exception e1) {
}
}
if (e.getSource() == save && (pathSelect == null)) {// 保存
JFileChooser chooser = new JFileChooser();
chooser.setDialogTitle("保存");
chooser.showSaveDialog(null);
chooser.setVisible(true);
PrintStream ps;
try {
pathSelect = chooser.getSelectedFile().getPath();
ps = new PrintStream(pathSelect);
System.setOut(ps);
System.out.println(this.textarea.getText());
} catch (Exception e1) {
}
} else if (e.getSource() == save && !(pathSelect == null)) {
PrintStream ps;
try {
ps = new PrintStream(pathSelect);
System.setOut(ps);
System.out.println(this.textarea.getText());
} catch (FileNotFoundException e1) {
}
}
if (e.getSource() == create) {
textarea.setText("");
pathSelect = null;
}
if (e.getSource() == exit) {
System.exit(0);
}
if (e.getSource() == undo) {
if (um.canUndo()) {
um.undo();
}
}
if (e.getSource() == cut || e.getSource() == cut2) {
textarea.cut();
} else if (e.getSource() == copy || e.getSource() == copy2) {
textarea.copy();
} else if (e.getSource() == paste || e.getSource() == paste2) {
textarea.paste();
} else if (e.getSource() == findRep) {
new FindAndReplace(textarea);
}
else if (e.getSource() == selectAll || e.getSource() == selectAll2) {
textarea.selectAll();
}
if (e.getSource() == font) {
new Format(textarea);
}
if (e.getSource() == about) {
new About();
}
}
public static void main(String[] args) {
new JNotepad();
}
}
class FindAndReplace extends JDialog implements ActionListener {// 查找和替换
JLabel findLabel = new JLabel("查找内容：");
JLabel repLabel = new JLabel(" 替换为：");
JTextField findTf = new JTextField(8);
JTextField repTf = new JTextField(8);
JButton findBtn = new JButton("查找");
JButton repBtn = new JButton("替换");
JPanel findPn = new JPanel();
JPanel repPn = new JPanel();
JTextArea textarea;
String text;
boolean flg = false;
int len;
int start = 0;
int k = 0;
public FindAndReplace(JTextArea textarea) {
this.textarea = textarea;
findPn.add(findLabel);
findPn.add(findTf);
findPn.add(findBtn);
repPn.add(repLabel);
repPn.add(repTf);
repPn.add(repBtn);
this.add(findPn);
this.add(repPn);
findBtn.addActionListener(this);
repBtn.addActionListener(this);
this.setTitle("查找和替换");
this.setLayout(new GridLayout(2, 1));
// this.setBounds(400, 200, 300, 140);
this.pack();
this.setLocationRelativeTo(null);
this.setResizable(false);
this.setVisible(true);
this.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
}
@SuppressWarnings("deprecation")
public void actionPerformed(ActionEvent e) {
String findText = findTf.getText();
String repText = repTf.getText();
text = textarea.getText();
if (e.getSource() == findBtn) {
findBtn.setLabel("下一个");
if (findText != null) {
len = findText.length();
start = text.indexOf(findText, k);
k = start + len;
textarea.select(start, start + len);
flg = true;
if (start == -1) {
JOptionPane.showMessageDialog(null, "已到文件尾部！", "提示", JOptionPane.INFORMATION_MESSAGE);
start = 0;
k = 0;
flg = false;
}
}
} else if (e.getSource() == repBtn) {
if (flg) {
textarea.replaceRange(repText, start, start + len);
flg = false;
}
}
}
}
// 字体格式
class Format extends JDialog implements ActionListener {
public static int style = 0; // 全局变量类型，默认值为0
public static int size = 16; // 全局变量字体大小，默认值为16
public static Font font = new Font("新宋体", style, size); // 全局变量字体，默认值为新宋体
JPanel pn = new JPanel();
JPanel okCelPn = new JPanel();
JPanel fontPn = new JPanel();
JPanel ptPn = new JPanel();
JLabel fontLabel = new JLabel("字体: ");
JLabel fontStyleLabel = new JLabel(" 字形: ");
JLabel ptLabel = new JLabel(" 磅值: ");
JButton ok = new JButton("确定");
JButton cancel = new JButton("取消");
GraphicsEnvironment e = GraphicsEnvironment.getLocalGraphicsEnvironment();// 获取系统中可用的字体的名字
String[] fontName = e.getAvailableFontFamilyNames();// 获取系统中可用的字体的名字
String[] fontType = { "常规", "倾斜", "粗体", "粗偏斜体" };
JList fontList = new JList(fontName);
JList fontTypeList = new JList(fontType);
JScrollPane fontScroll = new JScrollPane(fontList);
JScrollPane fontTypeScroll = new JScrollPane(fontTypeList);
JTextArea textarea;
SpinnerModel spinnerModel = new SpinnerNumberModel(size, // initial value
0, // min
100, // max
2 // Step
);
JSpinner spinner = new JSpinner(spinnerModel);
public Format(JTextArea textarea) {
this.textarea = textarea;
ok.addActionListener(this);
cancel.addActionListener(this);
pn.setLayout(new GridLayout(2, 1));
pn.add(fontPn);
pn.add(ptPn);
fontPn.add(fontLabel);
fontPn.add(fontScroll);
fontPn.add(fontStyleLabel);
fontPn.add(fontTypeScroll);
ptPn.add(ptLabel);
ptPn.add(spinner);
fontList.setVisibleRowCount(5);
fontList.setFixedCellWidth(60);
fontList.setSelectedIndex(50);
fontList.setSelectedValue(font.getFontName(), true);
fontTypeList.setVisibleRowCount(5);
fontTypeList.setSelectedIndex(style);
okCelPn.add(ok);
okCelPn.add(cancel);
okCelPn.setLayout(new FlowLayout(FlowLayout.RIGHT));
this.add(pn, BorderLayout.CENTER);
this.add(okCelPn, BorderLayout.SOUTH);
this.setTitle("字体");
this.pack();
this.setLocationRelativeTo(null);
this.setResizable(false);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
}
public void actionPerformed(ActionEvent e) {
if (e.getSource() == ok) {
System.out.println(fontList.getSelectedValue());
style = this.type();
size = Integer.parseInt(spinner.getValue().toString());
font = new Font((String) fontList.getSelectedValue(), style, size);
textarea.setFont(font);
this.dispose();
System.out.println(type());
} else if (e.getSource() == cancel) {
this.dispose();
}
}
private int type() {
if (fontTypeList.getSelectedValue().equals("倾斜")) {
return 1;
} else if (fontTypeList.getSelectedValue().equals("粗体")) {
return 2;
} else if (fontTypeList.getSelectedValue().equals("粗偏斜体")) {
return 3;
} else
return 0;
}
}
class About extends JDialog {// 关于窗口
About() {
JOptionPane.showMessageDialog(null, " 作者：cjb 版本：v1.5\n\n 联系：[email protected]", "关于",
JOptionPane.PLAIN_MESSAGE);
}
}转载请注明出处。