我是大四生物專業的學生，但是對計算機專業很感興趣，最近學了Java編程，就編了仿windows系統下的記事本練練手，這個記事本實現了windows系統下的大部分功能，只有很少的部分沒有實現，比如撤銷命令的不完美，這是本人的能力有限，還有那些JMenuItem的是否可用問題，這只是本人比較偷懶，無心再去實現，希望能夠與廣大的Java愛好者分享我的代碼，共同學習進步，我肯定有不足之處，比如有些代碼的重複，代碼的佈置，以及變量的取名問題，希望廣大的Java大牛多提寶貴意見，本人將不勝感激，另外，本人還未找工作，以後進入IT行業，希望藉此程序能夠找到我的伯樂~~~
，好了，話不多少，直接上代碼！
package org.mfy.notepad;
import java.awt.*;
import javax.swing.* ;
import java.awt.event.* ;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import javax.swing.event.*;
import javax.swing.text.BadLocationException;
import javax.swing.undo.*;
public class MyNotepad extends JFrame{
//文件的標題
private String title = "無標題" ;
//菜單欄
private JPanel mp = new JPanel() ;
private JMenuBar mb = new JMenuBar() ;
private JMenu
file = new JMenu("文件(F)"),
edit = new JMenu("編輯(E)"),
format = new JMenu("格式(V)"),
view = new JMenu("查看(O)"),
help = new JMenu("幫助(H)");
//文件
private JMenuItem
newFile = new JMenuItem("新建(N)") ,
open = new JMenuItem("打開(O)") ,
save = new JMenuItem("保存(S)") ,
exit = new JMenuItem("退出(X)") ;
//編輯
private JMenuItem
undo = new JMenuItem("撤銷(U)") ,
cut = new JMenuItem("剪切(T)") ,
copy = new JMenuItem("複製(C)") ,
paste = new JMenuItem("粘貼(P)") ,
delete = new JMenuItem("刪除(L)") ,
find = new JMenuItem("查找(F)") ,
replace = new JMenuItem("替換(R)") ,
goTo = new JMenuItem("轉到(G)") ,
selectAll = new JMenuItem("全選(A)") ,
time = new JMenuItem("時間/日期(D)") ;
//格式
private JMenuItem font = new JMenuItem("字體(F)") ;
private JCheckBox autoLineWrap = new JCheckBox("自動換行(W)") ;
//查看
private JMenuItem state = new JMenuItem("狀態(S)") ;
//幫助
private JMenuItem
checkHelp = new JMenuItem("查看幫助(H)") ,
about = new JMenuItem("關於記事本(A)") ;
//文本域
private JTextArea txt = new JTextArea() ;
//彈出菜單
private JPopupMenu jpm = new JPopupMenu() ;
//定義彈出窗口的打開狀態
private static boolean isOpen = false ;
//獲取屏幕的尺寸
private int x = (int) Toolkit.getDefaultToolkit().getScreenSize().getWidth() ;
private int y = (int) Toolkit.getDefaultToolkit().getScreenSize().getHeight() ;
public MyNotepad(){
//新建
newFile.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
String text = txt.getText() ;
if(!text.equals("")){
String str[] = text.split("\n") ;
int result = JOptionPane.showConfirmDialog(null, "是否將更改保存到 "+
title+"?", "記事本", JOptionPane.YES_NO_CANCEL_OPTION) ;
if(result == JOptionPane.NO_OPTION){ //不保存
txt.setText("");
}else if(result == JOptionPane.CANCEL_OPTION){} //取消保存
else if(result == 0){ //保存
JFileChooser jfc = new JFileChooser() ;
jfc.setDialogTitle("保存");
int ssd = jfc.showSaveDialog(MyNotepad.this) ;
if(ssd == jfc.APPROVE_OPTION){
File file = jfc.getSelectedFile() ;
PrintStream out = null ;
try {
out = new PrintStream(new FileOutputStream(file)) ;
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
for(String s:str){
out.print(s + "\r\n");
}
out.close();
txt.setText(""); ;
}
}
}
}
});
//打開
open.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
JFileChooser jfc = new JFileChooser() ;
jfc.setDialogTitle("打開");
int result = jfc.showOpenDialog(MyNotepad.this) ;
if(result == JFileChooser.CANCEL_OPTION){}
else if(result == JFileChooser.APPROVE_OPTION){
File file = jfc.getSelectedFile() ;
BufferedReader input = null ;
try {
input = new BufferedReader(new InputStreamReader(new FileInputStream(file))) ;
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
String temp = null ;
try {
while((temp = input.readLine())!=null){
txt.append(temp +"\n");
}
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
input.close() ;
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
}
});
//保存
save.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
String str[] = txt.getText().split("\n") ;
JFileChooser jfc = new JFileChooser() ;
jfc.setDialogTitle("保存");
int ssd = jfc.showSaveDialog(MyNotepad.this) ;
if(ssd == jfc.APPROVE_OPTION){
File file = jfc.getSelectedFile() ;
PrintStream out = null ;
try {
out = new PrintStream(new FileOutputStream(file)) ;
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
for(String s:str){
out.print(s + "\r\n");
}
out.close();
}
}
});
//退出
exit.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
String str = txt.getText() ;
if(!str.equals("")){
int result = JOptionPane.showConfirmDialog(null, "退出前是否保存？", "退出",
JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.WARNING_MESSAGE) ;
if(result == JOptionPane.YES_OPTION){}
if(result == JOptionPane.NO_OPTION){
dispose() ;
}
if(result == JOptionPane.CANCEL_OPTION){}
}else{
dispose() ;
}
}
});
/*
* 撤銷功能
*/
final UndoManager undom = new UndoManager() ;
txt.getDocument().addUndoableEditListener(new UndoableEditListener(){
@Override
public void undoableEditHappened(UndoableEditEvent e) {
undom.addEdit(e.getEdit()) ;
}
});
undo.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
if(undom.canUndo()){
undom.undo();
}
}
});
//剪切
cut.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
txt.cut() ;
}
});
//粘貼
paste.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
txt.paste();
}
});
//刪除
delete.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
int start = txt.getSelectionStart() ;
int end = txt.getSelectionEnd() ;
txt.replaceRange("", start, end);
}
});
/*
* 爲了更好地訪問本類中的屬性，所以查找使用內部類
*/
//定義查找內部類
class FindDialog extends JDialog{
private JPanel pan = new JPanel() ;
private JLabel label = new JLabel("查找內容(N):") ;
private JTextField txtf = new JTextField(20) ;
private JButton btnf = new JButton("查找下一個(F)") ;
private JButton btnc = new JButton("取消") ;
private JCheckBox jcb = new JCheckBox("區分大小寫(C)") ;
private JRadioButton jrb1 = new JRadioButton("向上(U)") ;
private JRadioButton jrb2 = new JRadioButton("向下(D)",true) ;
public FindDialog(){
super(MyNotepad.this, "查找") ;
//當文本框中有內容時按鈕才起作用
txtf.getDocument().addDocumentListener(new DocumentListener(){
@Override
public void insertUpdate(DocumentEvent e) {
btnf.setEnabled(true);
}
@Override
public void removeUpdate(DocumentEvent e) {
if(txtf.getText().length() == 0){
btnf.setEnabled(false);
}
}
@Override
public void changedUpdate(DocumentEvent e) {
}
});
btnf.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
String str = txtf.getText() ;
String texta = txt.getText() ;
int start = 0 ;
int end = 0 ;
int caretPosition = txt.getCaretPosition() ; //記錄光標的起始位置
if(jcb.isSelected()){ //區分大小寫
if(jrb2.isSelected()){ //向下查詢,如果有光標就從光標的位置開始查找，否則就從選中的文本之後的位置開始查找
start = (txt.getSelectedText()==null ? caretPosition : txt.getSelectionEnd()) ;
start = texta.indexOf(str, start) ;
if(start == -1){ //如果沒有找到
JOptionPane.showMessageDialog(null, "找不到"+str);
}else{ //如果找到了
end = start + str.length() ;
txt.select(start, end);
}
}else if(jrb1.isSelected()){ //向上查詢,如果有光標就從光標的位置開始查找，否則就從選中的文本之前的位置開始查找
end = (txt.getSelectedText()==null ? caretPosition : txt.getSelectionStart()) ;
String subtext = texta.substring(0, end) ;
start = subtext.lastIndexOf(str, end-1) ;
if(start == -1){
JOptionPane.showMessageDialog(null, "找不到"+str) ;
}else{
end = start + str.length() ;
txt.select(start, end);
}
}
}
if(!jcb.isSelected()){ //不區分大小寫
texta = texta.toLowerCase() ;
if(jrb2.isSelected()){ //向下查詢,如果有光標就從光標的位置開始查找，否則就從選中的文本之後的位置開始查找
start = (txt.getSelectedText()==null ? caretPosition : txt.getSelectionEnd()) ;
start = texta.indexOf(str.toLowerCase(), start) ;
if(start == -1){ //如果沒有找到
JOptionPane.showMessageDialog(null, "找不到"+str) ;
}else{ //如果找到了
end = start + str.length() ;
txt.select(start, end);
}
}else if(jrb1.isSelected()){ //向上查詢,如果有光標就從光標的位置開始查找，否則就從選中的文本之前的位置開始查找
end = (txt.getSelectedText() == null ? caretPosition : txt.getSelectionStart()) ;
String subtext = texta.substring(0, end) ;
start = subtext.lastIndexOf(str.toLowerCase(), end-1) ;
if(start == -1){
JOptionPane.showMessageDialog(null, "找不到"+str) ;
}else{
end = start + str.length() ;
txt.select(start, end);
}
}
}
}
});
btnc.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
dispose() ;
isOpen = false ;
}
});
this.setLayout(null) ;
label.setBounds(12,10,80,20) ;
txtf.setBounds(100,10,170,20) ;
btnf.setBounds(280,10,90,20) ;
btnf.setMargin(new Insets(0, 0,0, 0)) ;
btnf.setEnabled(false); //初始化查找下一個按鈕不可選
jcb.setBounds(12,70,110,20) ;
jrb1.setMargin(new Insets(0,0,0,0)) ;
jrb2.setMargin(new Insets(0,0,0,0)) ;
ButtonGroup group = new ButtonGroup() ;
group.add(jrb1);
group.add(jrb2);
pan.add(jrb1) ;
pan.add(jrb2) ;
pan.setBorder(BorderFactory.createTitledBorder("方向")) ;
pan.setBounds(120,40,150,55) ;
btnc.setBounds(280,40,90,20) ;
btnc.setMargin(new Insets(0,0,0,0)) ;
add(btnf) ;
add(label) ;
add(txtf) ;
add(jcb) ;
add(pan) ;
add(btnc) ;
setSize(380,130) ;
setLocation(x/2-190,y/2-65) ;
setResizable(false) ;
setVisible(true) ;
setDefaultCloseOperation(DISPOSE_ON_CLOSE) ;
//每次只能顯示一個窗口
addWindowListener(new WindowAdapter(){
public void windowOpened(WindowEvent e){
isOpen = true ;
}
}) ;
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
isOpen = false ;
}
}) ;
}
}
//查找的監聽事件
find.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
if(!isOpen){
new FindDialog() ;
}
}
});
//替換內部類
class ReplaceDialog extends JDialog{
private JLabel label1 = new JLabel("查找內容(N)") ;
private JLabel label2 = new JLabel("替換爲(P)") ;
private JTextField field1 = new JTextField(20) ;
private JTextField field2 = new JTextField(20) ;
private JButton find = new JButton("查找下一個(F)") ;
private JButton replace = new JButton("替換(R)") ;
private JButton replaceAll = new JButton("全部替換(A)") ;
private JButton canc = new JButton("取消") ;
private JCheckBox jcb = new JCheckBox("區分大小寫(C)") ;
public ReplaceDialog(){
super(MyNotepad.this,"查找") ;
this.setLayout(null) ;
label1.setBounds(12,5,80,20) ;
label2.setBounds(12,30,80,20) ;
field1.setBounds(100,5,170,20) ;
field2.setBounds(100,30,170,20) ;
find.setBounds(280,5,90,20) ;
find.setMargin(new Insets(0, 0,0, 0)) ;
replace.setBounds(280,30,90,20) ;
replace.setMargin(new Insets(0,0,0,0)) ;
replaceAll.setBounds(280,55,90,20) ;
replaceAll.setMargin(new Insets(0,0,0,0)) ;
jcb.setBounds(12,70,105,20) ;
jcb.setMargin(new Insets(0,0,0,0)) ;
canc.setBounds(280,80,90,20) ;
field1.getDocument().addDocumentListener(new DocumentListener(){
//當文本框中有內容時按鈕才起作用
@Override
public void insertUpdate(DocumentEvent e) {
find.setEnabled(true);
replace.setEnabled(true);
replaceAll.setEnabled(true);
}
@Override
public void removeUpdate(DocumentEvent e) {
if(field1.getText().length() == 0){
find.setEnabled(false);
replace.setEnabled(false);
replaceAll.setEnabled(false);
}
}
@Override
public void changedUpdate(DocumentEvent e) {
}
});
//查找下一個按鈕
find.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
new findFunction() ;
}
});
//替換按鈕
replace.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
//如果有選中的內容就替換，然後選中下一個要替換的內容，否則先查找要替換的內容
if(txt.getSelectedText()!=null){
txt.replaceSelection(field2.getText());
}
new findFunction() ;
}
});
//替換所有按鈕
replaceAll.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
String str = txt.getText() ;
if(jcb.isSelected()){
str = str.replaceAll(field1.getText(), field2.getText()) ;
}else{
str = str.replaceAll("(?i)" + field1.getText(), field2.getText()) ;
}
txt.setText(str);
}
});
//取消按鈕
canc.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
dispose() ;
isOpen = false ;
}
});
add(label1) ;
add(label2) ;
add(field1) ;
add(field2) ;
find.setEnabled(false);
replace.setEnabled(false);
replaceAll.setEnabled(false);
add(find) ;
add(replace) ;
add(replaceAll) ;
add(jcb) ;
add(canc) ;
setSize(380,130) ;
setLocation(x/2-190,y/2-65) ;
setResizable(false) ;
setVisible(true) ;
setDefaultCloseOperation(DISPOSE_ON_CLOSE) ;
addWindowListener(new WindowAdapter(){
public void windowOpened(WindowEvent e){
isOpen = true ;
}
}) ;
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
isOpen = false ;
}
}) ;
}
//替換對話框中查找功能類
/*
* 爲了簡化代碼，將替換對話框裏面的查找功能提取出來，成爲一個內部類
*/
class findFunction {
public findFunction(){ //要替換的字符串的位置
int start = 0 ;
int end = 0 ;
int caretPosition = txt.getCaretPosition() ;
String str = field1.getText() ;
String texta = txt.getText() ;
//區分大小寫，向下查詢,如果有光標就從光標的位置開始查找，否則就從選中的文本之後的位置開始查找
if(jcb.isSelected()){
start = (txt.getSelectedText()==null ? caretPosition : txt.getSelectionEnd()) ;
start = texta.indexOf(str.toLowerCase(), start) ;
if(start == -1){ //如果沒有找到
JOptionPane.showMessageDialog(null, "找不到"+str) ;
}else{ //如果找到了
end = start + str.length() ;
txt.select(start, end);
}
}else if(!jcb.isSelected()){ //不區分大小寫
texta = texta.toLowerCase() ;
//向下查詢,如果有光標就從光標的位置開始查找，否則就從選中的文本之後的位置開始查找
start = (txt.getSelectedText()==null ? caretPosition : txt.getSelectionEnd()) ;
start = texta.indexOf(str.toLowerCase(), start) ;
if(start == -1){ //如果沒有找到
JOptionPane.showMessageDialog(null, "找不到"+str) ;
}else{ //如果找到了
end = start + str.length() ;
txt.select(start, end);
}
}
}
}
}
replace.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
if(!isOpen){
new ReplaceDialog() ;
}
}
});
//轉到內部類
class GoToDialog extends JDialog{
private JLabel label = new JLabel("行號(L):") ;
private JTextField field = new JTextField() ;
private JButton goToBtn = new JButton("轉到") ;
private JButton canBtn = new JButton("取消") ;
private int rowNum = 0 ;//行號
public GoToDialog(){
field.addKeyListener(new KeyAdapter(){
public void keyTyped(KeyEvent e){
if(!(e.getKeyChar()>='0' && e.getKeyChar()<='9' )){
e.consume();
}
}
});
//轉到
goToBtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
rowNum = Integer.parseInt(field.getText()) ;
if(rowNum>txt.getLineCount()){
JOptionPane.showMessageDialog(null, "行數超過了總行數", "記事本-跳行",JOptionPane.INFORMATION_MESSAGE);
field.setText(txt.getLineCount() +"") ;
field.requestFocus() ; //獲取文本域的焦點
field.selectAll();
}else{
int position = 0 ;
try {
position = txt.getLineStartOffset(rowNum-1) ;
} catch (BadLocationException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
GoToDialog.this.dispose();
txt.requestFocus();
txt.setCaretPosition(position);
}
}
});
//取消
canBtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
dispose() ;
isOpen = false ;
}
});
setLayout(null) ;
label.setBounds(12,10,100,20) ;
field.setBounds(12,30,230,20) ;
goToBtn.setBounds(85,65,75,20) ;
canBtn.setBounds(167,65,75,20) ;
add(label) ;
add(field) ;
add(goToBtn) ;
add(canBtn) ;
setTitle("轉到指定行") ;
setModal(true) ; //當對話框彈出時母窗口不可編輯
setSize(270,130) ;
setLocation(x/2-135,y/2-65) ;
setResizable(false) ;
setVisible(true) ;
setDefaultCloseOperation(DISPOSE_ON_CLOSE) ;
addWindowListener(new WindowAdapter(){
public void windowOpened(WindowEvent e){
isOpen = true ;
}
}) ;
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
isOpen = false ;
}
}) ;
}
}
//轉到
goTo.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
if(!isOpen){
new GoToDialog() ;
}
}
});
//全選
selectAll.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
txt.requestFocus();
txt.selectAll() ;
}
});
time.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
String dateTime = null ;
int pos = txt.getCaretPosition() ;
dateTime = new SimpleDateFormat("hh:mm yyyy/MM/dd").format(new Date()) ;
txt.insert(dateTime, pos);
}
});
//自動換行
autoLineWrap.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
if(autoLineWrap.isSelected()){
txt.setLineWrap(true);
}else{
txt.setLineWrap(false);
}
}
});
//字體內部類
class FontDialog extends JDialog{
private JLabel label1 = new JLabel("字體(F):") ;
private JLabel label2 = new JLabel("字形(Y):") ;
private JLabel label3 = new JLabel("大小(S):") ;
private JLabel instns = new JLabel("中文示例AaBaCc",JLabel.CENTER) ;
private JTextField field1 = new JTextField() ;
private JTextField field2 = new JTextField() ;
private JTextField field3 = new JTextField() ;
private String fonts[] = GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames() ;
private JScrollPane scr1 = new JScrollPane() ;
private JScrollPane scr2 = new JScrollPane() ;
private JScrollPane scr3 = new JScrollPane() ;
private JList fontList = null ;
private JList fStyleList = null ;
private JList fSizeList = null ;
private JButton okBtn = new JButton("確定") ;
private JButton cancBtn = new JButton("取消") ;
//示例的顯示
private String selectedFont = "Fixedsys";
private int selectedStyle = Font.PLAIN;
private float selectedSize = 16;
public FontDialog() {
fontList = new JList(fonts) ;
//fontStyle
String style[] = {"常規","傾斜","粗體","傾斜 粗體"} ;
fStyleList = new JList(style) ;
//fontSize
String size[] = {"8","9","10","11","12","14","16","18","20","22","24",
"26","28","36","48","72","初號","小號","一號","小一","二號",
"小二","三號","小三","四號","小四","五號","六號","小六","七號","八號"} ;
fSizeList = new JList(size) ;
//Jlist中一次只能選擇一個選項
fontList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION) ;
fStyleList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION) ;
fSizeList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION) ;
scr1.add(fontList) ;
scr2.add(fStyleList) ;
scr3.add(fSizeList) ;
scr1.setViewportView(fontList);
scr2.setViewportView(fStyleList);
scr3.setViewportView(fSizeList);
okBtn.setBounds(250,450,80,30) ;
cancBtn.setBounds(340,450,80,30) ;
label1.setBounds(20,20,50,20) ;
label2.setBounds(205,20,50,20) ;
label3.setBounds(350,20,50,20) ;
instns.setBounds(205,280,215,80) ;
instns.setBorder(BorderFactory.createTitledBorder("示例")) ;
field1.setBounds(20,40,170,20) ;
field2.setBounds(205,40,130,20) ;
field3.setBounds(350,40,70,20) ;
scr1.setBounds(20,60,170,170) ;
scr2.setBounds(205,60,130,170) ;
scr3.setBounds(350,60,70,150) ;
scr1.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER) ;
scr2.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER) ;
scr3.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER) ;
//文本框1
field1.addKeyListener(new KeyAdapter(){
public void keyTyped(KeyEvent e){
int count = 0 ; //文本框中的字符數
String str = null ; //保存輸入到文本框中的字符
int size = fontList.getModel().getSize() ; //fontList中的文本個數
str = field1.getText()+e.getKeyChar()+"" ;
count = str.length() ;
for(int i=0; i=count){
//判斷輸入的是否與JList中的內容部分匹配(忽略大小寫)
if(fontList.getModel().getElementAt(i).substring(0, count).compareToIgnoreCase(str)==0){
fontList.ensureIndexIsVisible(size-i>=10 ? i+9 : size-1);
if(fontList.getModel().getElementAt(i).compareToIgnoreCase(str)==0){
fontList.setSelectedIndex(i);
}
break ;
}
else{
fontList.ensureIndexIsVisible(0);
fontList.clearSelection();
}
}
}
}
});
//文本框2
field2.addKeyListener(new KeyAdapter(){
public void keyTyped(KeyEvent e){
int count = 0 ; //文本框中的字符數
String str = null ; //保存輸入到文本框中的字符
int size = fStyleList.getModel().getSize() ; //fontList中的文本個數
str = field2.getText()+e.getKeyChar()+"" ;
count = str.length() ;
for(int i=0; i=count){
//判斷輸入的是否與JList中的內容部分匹配(忽略大小寫)
if(fStyleList.getModel().getElementAt(i).substring(0, count).compareToIgnoreCase(str)==0){
if(fStyleList.getModel().getElementAt(i).compareToIgnoreCase(str)==0){
fStyleList.setSelectedIndex(i);
}
break ;
}
else{
fStyleList.clearSelection();
}
}
}
}
});
//文本框3
field3.addKeyListener(new KeyAdapter(){
public void keyTyped(KeyEvent e){
int count = 0 ; //文本框中的字符數
String str = null ; //保存輸入到文本框中的字符
int size = fSizeList.getModel().getSize() ; //fontList中的文本個數
str = field3.getText()+e.getKeyChar()+"" ;
count = str.length() ;
for(int i=0; i=count){
//判斷輸入的是否與JList中的內容部分匹配(忽略大小寫)
if(fSizeList.getModel().getElementAt(i).substring(0, count).compareToIgnoreCase(str)==0){
fSizeList.ensureIndexIsVisible(size-i>=9 ? i+8 : size-1);
if(fSizeList.getModel().getElementAt(i).compareToIgnoreCase(str)==0){
fSizeList.setSelectedIndex(i);
}
break ;
}
else{
fSizeList.ensureIndexIsVisible(0);
fSizeList.clearSelection();
}
}
}
}
});
//設置示例中的文本字體樣式
//設置字形與字號對照表
final Map map = new HashMap() ;
map.put("常規", (float) Font.PLAIN) ;
map.put("傾斜", (float) Font.ITALIC) ;
map.put("粗體", (float) Font.BOLD) ;
map.put("傾斜 粗體", (float) (Font.ITALIC+Font.BOLD)) ;
map.put("初號", 42f) ;
map.put("小號", 36f) ;
map.put("一號", 26f) ;
map.put("小一", 24f) ;
map.put("二號", 22f) ;
map.put("小二", 18f) ;
map.put("三號", 16f) ;
map.put("小三", 15f) ;
map.put("四號", 14f) ;
map.put("小四", 12f) ;
map.put("五號", 10.5f) ;
map.put("六號", 7.5f) ;
map.put("小六", 6.5f) ;
map.put("七號", 5.5f) ;
map.put("八號", 5f) ;
//字體列表監聽事件
fontList.addListSelectionListener(new ListSelectionListener(){
@Override
public void valueChanged(ListSelectionEvent e) {
String txtFont = txt.getFont().getName() ; //獲取文本中的字體
selectedFont = fontList.isSelectionEmpty() ? txtFont :fontList.getSelectedValue() ;
instns.setFont(new Font(selectedFont,selectedStyle,(int)selectedSize));
}
}) ;
//字體樣式監聽事件
fStyleList.addListSelectionListener(new ListSelectionListener(){
@Override
public void valueChanged(ListSelectionEvent e) {
int txtStyle = txt.getFont().getStyle() ; //獲取文本中的字體
selectedStyle = (int) (fStyleList.isSelectionEmpty() ? txtStyle :map.get(fStyleList.getSelectedValue())) ;
instns.setFont(new Font(selectedFont,selectedStyle,(int)selectedSize));
}
}) ;
//字體大小監聽
fSizeList.addListSelectionListener(new ListSelectionListener(){
public void valueChanged(ListSelectionEvent e){
int txtSize = txt.getFont().getSize() ;
if(!fSizeList.isSelectionEmpty()){
String temp = fSizeList.getSelectedValue() ;
if(temp.matches("\\d+")){
selectedSize = Integer.parseInt(temp) ;
}else{
selectedSize = map.get(fSizeList.getSelectedValue()) ;
}
}
instns.setFont(new Font(selectedFont,selectedStyle,(int)selectedSize));
}
});
//確定按鈕
okBtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
txt.setFont(new Font(selectedFont,selectedStyle,(int)selectedSize));
isOpen = false ;
dispose() ;
}
});
//取消按鈕
cancBtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
dispose() ;
isOpen = false ;
}
});
/*class MyRender extends DefaultListCellRenderer{
public Component getListCellRendererComponent(JList<?> list, Object value,
int index, boolean isSelected,
boolean cellHasFocus){
String font = value.toString() ;
setFont(new Font(font,Font.PLAIN,12)) ;
return this ;
}
}*/
setLayout(null) ;
add(label1) ;
add(label2) ;
add(label3) ;
add(instns) ;
add(field1) ;
add(field2) ;
add(field3) ;
add(scr1) ;
add(scr2) ;
add(scr3) ;
add(okBtn) ;
add(cancBtn) ;
setModal(true) ; //當對話框彈出時母窗口不可編輯
setSize(440,530) ;
setLocation(x/2-220,y/2-265) ;
setResizable(false) ;
setVisible(true) ;
setDefaultCloseOperation(DISPOSE_ON_CLOSE) ;
addWindowListener(new WindowAdapter(){
public void windowOpened(WindowEvent e){
isOpen = true ;
}
}) ;
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
isOpen = false ;
}
}) ;
}
}
//字體
font.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
if(!isOpen){
new FontDialog() ;
}
}
});
//查看幫助
checkHelp.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
JOptionPane.showMessageDialog(null, "與Windows系統下的幫助相似", "幫助", JOptionPane.CLOSED_OPTION);
}
});
//關於
about.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
JOptionPane.showMessageDialog(null, "仿Windows記事本，初學Java的練手作品", "關於", JOptionPane.CLOSED_OPTION);
}
});
//右鍵彈出菜單內部類
class popupListener extends MouseAdapter{
private JPopupMenu popup = null ;
public popupListener(JPopupMenu popup){
this.popup = popup ;
}
public void mouseReleased(MouseEvent e){
showPopupMenu(e) ;
}
public void mouseClicked(MouseEvent e){
showPopupMenu(e) ;
}
private void showPopupMenu(MouseEvent e) {
if (e.isPopupTrigger()) {
//右鍵彈出菜單
jpm.add(undo) ;
jpm.add(cut) ;
jpm.add(copy) ;
jpm.add(delete) ;
jpm.add(find) ;
jpm.add(replace) ;
jpm.add(goTo) ;
jpm.add(selectAll) ;
jpm.add(time) ;
popup.show(e.getComponent(), e.getX(), e.getY());
}
}
}
//右鍵彈出菜單
txt.addMouseListener(new popupListener(jpm)) ;
//設置快捷鍵
newFile.setAccelerator(KeyStroke.getKeyStroke('N',java.awt.event.InputEvent.CTRL_DOWN_MASK));
open.setAccelerator(KeyStroke.getKeyStroke('O',java.awt.event.InputEvent.CTRL_DOWN_MASK));
save.setAccelerator(KeyStroke.getKeyStroke('S',java.awt.event.InputEvent.CTRL_DOWN_MASK));
undo.setAccelerator(KeyStroke.getKeyStroke('Z',java.awt.event.InputEvent.CTRL_DOWN_MASK));
cut.setAccelerator(KeyStroke.getKeyStroke('X',java.awt.event.InputEvent.CTRL_DOWN_MASK));
copy.setAccelerator(KeyStroke.getKeyStroke('C',java.awt.event.InputEvent.CTRL_DOWN_MASK));
paste.setAccelerator(KeyStroke.getKeyStroke('V',java.awt.event.InputEvent.CTRL_DOWN_MASK));
find.setAccelerator(KeyStroke.getKeyStroke('F',java.awt.event.InputEvent.CTRL_DOWN_MASK));
replace.setAccelerator(KeyStroke.getKeyStroke('H',java.awt.event.InputEvent.CTRL_DOWN_MASK));
goTo.setAccelerator(KeyStroke.getKeyStroke('G',java.awt.event.InputEvent.CTRL_DOWN_MASK));
selectAll.setAccelerator(KeyStroke.getKeyStroke('A',java.awt.event.InputEvent.CTRL_DOWN_MASK));
time.setAccelerator((KeyStroke) KeyStroke.getAWTKeyStroke((char) KeyEvent.VK_F5));
//設置助記鍵
file.setMnemonic('F');
edit.setMnemonic('E');
format.setMnemonic('O');
view.setMnemonic('V');
help.setMnemonic('H');
newFile.setMnemonic('N');
open.setMnemonic('O');
save.setMnemonic('S');
exit.setMnemonic('X');
undo.setMnemonic('U');
cut.setMnemonic('T');
copy.setMnemonic('C');
paste.setMnemonic('P');
delete.setMnemonic('L');
find.setMnemonic('F');
replace.setMnemonic('R');
goTo.setMnemonic('G');
selectAll.setMnemonic('A');
time.setMnemonic('D');
font.setMnemonic('F');
autoLineWrap.setMnemonic('W');
state.setMnemonic('S');
checkHelp.setMnemonic('H');
about.setMnemonic('A');
txt.setFont(new Font("Fixedsys",Font.PLAIN,16));
txt.setEditable(true);
file.add(newFile) ;
file.add(open) ;
file.add(save) ;
file.addSeparator();
file.add(exit) ;
edit.add(undo) ;
edit.addSeparator();
edit.add(cut) ;
edit.add(copy) ;
edit.add(paste) ;
edit.add(delete) ;
edit.addSeparator();
edit.add(find) ;
edit.add(replace) ;
edit.add(goTo) ;
edit.addSeparator();
edit.add(selectAll) ;
edit.add(time) ;
format.add(autoLineWrap) ;
format.add(font) ;
view.add(state) ;
help.add(checkHelp) ;
help.addSeparator();
help.add(about) ;
mb.add(file) ;
mb.add(edit) ;
mb.add(format) ;
mb.add(view) ;
mb.add(help) ;
setJMenuBar(mb) ;
add(mp) ;
add(new JScrollPane(txt)) ;
setVisible(true) ;
setSize(530,640) ;
setLocation(x/2-265,y/2-320);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE) ;
}
}
package org.mfy.notepad;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Notepad {
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException
| IllegalAccessException | UnsupportedLookAndFeelException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
new MyNotepad() ;
}
}