java仿windows记事本小程序

java仿windows记事本小程序

本文实例为大家分享了java仿windows记事本小程序的具体代码，供大家参考，具体内容如下

import java.awt.CheckboxMenuItem;

import java.awt.Font;

import java.awt.Frame;

import java.awt.Menu;

import java.awt.MenuBar;

import java.awt.MenuItem;

import java.awt.MenuShortcut;

import java.awt.TextArea;

import java.awt.Toolkit;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.ItemEvent;

import java.awt.event.ItemListener;

import java.awt.event.KeyEvent;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.awt.peer.ButtonPeer;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.io.StringReader;

import java.io.StringWriter;

import java.sql.Date;

import java.text.SimpleDateFormat;

import javax.print.DocFlavor.STRING;

import javax.script.ScriptException;

import javax.swing.BorderFactory;

import javax.swing.BoxLayout;

import javax.swing.ButtonGroup;

import javax.swing.JFileChooser;

import javax.swing.JFrame;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JRadioButton;

import javax.swing.jscrollBar;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import javax.swing.border.EtchedBorder;

import javax.swing.border.TitledBorder;

import javax.swing.event.AncestorListener;

import javax.swing.filechooser.FileNameExtensionFilter;

public class Crazy_15_4 {

private JFrame http://f = new JFrame("记事本");

//成员变量

static String shearPlate = null;

static boolean isAutoWrap = true;//是否自动换行

JTextArea ta = new JTextArea(20, 60);

JScrollPane jsp = new JScrollPane(ta);

private MenuBar mb = new MenuBar();

public String fontStr = "宋体";

public String shapeStr = "0";

public String sizeStr = "20";

Font font = new Font(fontStr, Integer.parseInt(shapeStr),Integer.parseInt(sizeStr) );

//menu

Menu file = new Menu("文件");

Menu edit = new Menu("编辑");

Menu format = new Menu("格式");

//menuitem

MenuItem newItem = new MenuItem("新建");

MenuItem openItem = new MenuItem("打开");

MenuItem saveItem = new MenuItem("保存");

MenuItem saveAsItem = new MenuItem("另存为");

MenuItem cutItem = new MenuItem("剪切");

MenuItem copyItem = new MenuItem("复制");

MenuItem pasteItem = new MenuItem("粘贴");

CheckboxMenuItem autoWrap = new CheckboxMenuItem("自动换行",isAutoWrap);

MenuItem FontItem = new MenuItem("字体");

//使用“ctrl+x”快捷键

MenuItem exitIitem = new MenuItem("退出", new MenuShortcut(KeyEvent.VK_X));

public void init() {

//带滚动条的文本域

ta.setLineWrap(isAutoWrap);

jsp.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);

jsp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);

file.add(newItem);

file.add(openItem);

file.add(saveItem);

file.add(saveAsItem);

edit.add(cutItem);

edit.add(copyItem);

edit.add(pasteItem);

format.add(autoWrap);

format.add(FontItem);

mb.add(file);

mb.add(edit);

mb.add(format);

f.setMenuBar(mb);

f.addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent we) {

if(!(ta.getText().equals(""))) {

Object[] options = {"保存","不保存","取消"};

int a = JOptionPane.showOptionDialog(null,"是否将更改保存到H:/Programing/无标题.txt","记事本", JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE, null, options, options[0]);

if(a == JOptionPane.OK_OPTION ) {

if(save()) {

System.exit(0);

}

}else if(a == JOptionPane.NO_OPTION) {

System.exit(0);

}

}else {

System.exit(0);

}

}

});

newItem.addActionListener(new newListener());

openItem.addActionListener(new openListener());

saveItem.addActionListener(new saveListener());

saveAsItem.addActionListener(new saveAsListener());

cutItem.addActionListener(new cutAsListener());

copyItem.addActionListener(new copyAsListener());

pasteItem.addActionListener(new pasteAsListener());

autoWrap.addItemListener(new autoWrapAsListener());

FontItem.addActionListener(new fontListener());

ta.setFont(font);

//使文本框处在屏幕中间

int width = Toolkit.getDefaultToolkit().getScreenSize().width;

int height = Toolkit.getDefaultToolkit().getScreenSize().height;

f.add(jsp);

f.pack();

f.setLocation(width/2-f.getWidth()/2, height/2-f.getHeight()/2);

f.setVisible(true);

//避免关闭对话框直接关闭文本文件

f.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);

}

public static void main(String[] args) {

new Crazy_15_4().init();

}

//是否保存

public void saveOrNot() {

if(!(ta.getText().equals(""))) {

Object[] options = {"保存","不保存",http://"取消"};

int a = JOptionPane.showOptionDialog(null,"是否将更改保存到H:/Programing/无标题.txt","记事本", JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE, null, options, options[0]);

if(a == JOptionPane.OK_OPTION ) {

save();

}

}

}

//保存文本文件

public boolean save() {

boolean isSaved = false;

JFileChooser jf = new JFileChooser();

FileNameExtensionFilter filter = new FileNameExtensionFilter("txt","txt");

jf.setAcceptAllFileFilterUsed(false);

jf.setFileFilter(filter);

int value = jf.showSaveDialog(null);

if(value == JFileChooser.APPROVE_OPTION) {

File file = jf.getSelectedFile();

String str = ta.getText();

byte[] buf = str.getBytes();

try {

OutputStream os = new FileOutputStream(file);

os.write(buf);

os.flush();

os.close();

isSaved = true;

} catch (IOException e) {

e.printStackTrace();

}

}

return isSaved;

}

//新建监听器

class newListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

if(!(ta.getText().equals(""))) {

Object[] options = {"保存","不保存","取消"};

int a = JOptionPane.showOptionDialog(null,"是否将更改保存到H:/Programing/无标题.txt","记事本", JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE, null, options, options[0]);

if(a == JOptionPane.OK_OPTION ) {

if(save()) {

ta.setText("");

}

}else if(a == JOptionPane.NO_OPTION) {

ta.setText("");

}

}

}

}

//打开监听器，从硬盘目录打开文本文件

class openListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

JFileChooser jf = new JFileChooser();

FileNameExtensionFilter filter = new FileNameExtensionFilter("txt","txt");

jf.setAcceptAllFileFilterUsed(false);

jf.setFileFilter(filter);

int value = jf.showOpenDialog(null);

if(value == JFileChooser.APPROVE_OPTION) {

File file = jf.getSelectedFile();

try {

String encoding = "GBK";//考虑编码格式

InputStreamReader isr = new InputStreamReader(new FileInputStream(file),encoding);

BufferedReader br = new BufferedReader(isr);

String str = null;

while((str = br.readLine()) != null) {

ta.append(str);

}

} catch (FileNotFoundException e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

} catch (IOException e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

}

}

}

}

//保存监听器，以电脑时间命名

class saveListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

String name = null;

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH-mm-ss");

name = df.format(System.currentTimeMillis());

File file = new File("H:/Programing/workspace/"+name+".txt");

String str = ta.getText();

byte[] buf = str.getBytes();

if(!str.equals("")) {

try {

OutputStream os = new FileOutputStream(file);

os.write(buf);

os.flush();

os.close();

} catch (IOException e2) {

e2.printStackTrace();

}

}

}

}

//另存为监听器

class saveAsListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

save();

}

}

//剪切监听器

class cutAsListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

shearPlate = ta.getSelectedText();

int startPosi = ta.getSelectionStart();

int endPosi = ta.getSelectionEnd();

StringBuffer sb = new StringBuffer(ta.getText());

sb.delete(startPosi, endPosi);

ta.setText(sb.toString());

}

}

//复制监听器

class copyAsListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

shearPlate = ta.getSelectedText();

}

}

//粘贴监听器

class pasteAsListener implements ActionListener{

public void actionPerformed(ActionEvent e) {

int position = ta.getCaretPosition();

StringBuilder sb = new StringBuilder(ta.getText());

sb.insert(position, shearPlate);

ta.setText(sb.toString());

ta.setCaretPosition(position+shearPlate.length());

}

}

//自动换行监听器

class autoWrapAsListener implements ItemListener{

@Override

public void itemStateChanged(ItemEvent e) {

if(autoWrap.getState()) {

isAutoWrap = true;

ta.setLineWrap(isAutoWrap);

jsp.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);

jsp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);

}else {

isAutoWrap = false;

ta.setLineWrap(isAutoWrap);

jsp.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);

jsp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_NEVER);

}

}

}

//字体监听器

class fontListener implements ActionListener{

JFrame jf = new JFrame("字体");

JPanel jp = new JPanel();

ButtonPanel fontButton = new ButtonPanel("字体",new String[] {"宋体","黑体","楷体","吴祎晗1.0"});

ButtonPanel shapeButton = new ButtonPanel("字形",new String[] {"常规","粗体","斜体","粗体&斜体"});

ButtonPanel sizeButton = new ButtonPanel("字号",new String[] {"12","16","20","24","26"});

public void actionPerformed(ActionEvent e) {

jp.setBorder(new TitledBorder(new EtchedBorder(),"字体选择",TitledBorder.CENTER,TitledBorder.TOP));

jp.add(fontButton);

jp.add(shapeButton);

jp.add(sizeButton);

jf.add(jp);

jf.pack();

jf.setLocationRelativeTo(f);

jf.setVisible(true);

jf.addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent e) {

fontStr = fontButton.getSelec();

sizeStr = sizeButton.getSelec();

font = new Font(fontStr, shapeVal(shapeButton.getSelec()), Integer.parseInt(sizeStr));

ta.setFont(font);

}

});

}

public int shapeVal(String str) {

int a = 0;

switch (str) {

case "常规":

a = 0;

break;

case "粗体":

a = 1;

break;

case "斜体":

a = 2;

break;

case "粗体&斜体":

a = 3;

break;

}

return a;

}

}

}

//定义一个JPanel类扩展类，该类的对象包含多个纵向排列的

//JRadioButton控件，且panel扩展类可以指定一个字符串作为TitledBorder

class ButtonPanel extends JPanel{

private ButtonGroup group;

public ButtonPanel(String title, String[] options) {

setBorder(BorderFactory.createTitledBorder(BorderFactory.createEtchedBorder(),title));

setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));

group = new ButtonGroup();

for(int i=0; options!=null&&i

JRadioButton b = new JRadioButton(options[i]);

b.setActionCommand(options[i]);

this.add(b);

group.add(b);

if(title.equals("字号")) {

b.setSelected(i == 2);

}else {

b.setSelected(i == 0);

}

}

}

public String getSelec() {

return group.getSelection().getActionCommand();

}

}

JRadioButton b = new JRadioButton(options[i]);

b.setActionCommand(options[i]);

this.add(b);

group.add(b);

if(title.equals("字号")) {

b.setSelected(i == 2);

}else {

b.setSelected(i == 0);

}

}

}

public String getSelec() {

return group.getSelection().getActionCommand();

}

}

版权声明：本文内容由网络用户投稿，版权归原作者所有，本站不拥有其著作权，亦不承担相应法律责任。如果您发现本站中有涉嫌抄袭或描述失实的内容，请联系我们jiasou666@gmail.com 处理，核实后本网站将在24小时内删除侵权内容。