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今天我做了一個記事本編輯器爲URDu（阿拉伯語喜歡語言）爲朋友...我想出的代碼很長，我不認爲這是做這件事的正確方法特別是開關在它的情況..有對JFrame-> JTextPaneljava utf-8用法
import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.util.regex.*;
import java.awt.event.*;
class MyJFrames extends JFrame implements ActionListener{
private JTextArea txt;
private JMenuBar mb;
private JMenu file=new JMenu("File");
private JMenu edit=new JMenu("Edit");
private JMenu format=new JMenu("Format");
private JMenuItem open;
private JMenuItem save;
private JMenuItem saveAs;
private JMenuItem exit;
private JMenuItem find;
private JMenuItem findAndReplace;
private JCheckBoxMenuItem wrap;
private JMenuItem font;
private JScrollPane pane=null;
private MyFiling mf=new MyFiling();
private static String fileName;
private static int saveValue=0;
private JComboBox fontCombo;
private Font ffont;
MyJFrames(){
super("Urdu Notepad");
mb=new JMenuBar();
txt = new JTextArea();
txt.setFont(new Font("Arial",1,30));
txt.setWrapStyleWord(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
txt.grabFocus();
txt.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
open=new JMenuItem("Open");
save=new JMenuItem("Save");
saveAs=new JMenuItem("Save As");
exit=new JMenuItem("Exit");
find=new JMenuItem("Find");
findAndReplace=new JMenuItem("Replace");
wrap=new JCheckBoxMenuItem("Wrap");
font=new JMenuItem("Font");
file.add(open);
file.add(save);
file.add(saveAs);
file.add(exit);
edit.add(find);
edit.add(findAndReplace);
format.add(wrap);
format.add(font);
mb.add(file);
mb.add(edit);
mb.add(format);
pane=new JScrollPane(txt);
setJMenuBar(mb);
add(pane);
txt.addKeyListener(new keyAdapterOnText());
open.addActionListener(this);
save.addActionListener(this);
saveAs.addActionListener(this);
exit.addActionListener(this);
find.addActionListener(this);
findAndReplace.addActionListener(this);
wrap.addActionListener(this);
font.addActionListener(this);
setSize(600,600);
setVisible(true);
}
private class keyAdapterOnText extends KeyAdapter{
keyAdapterOnText(){
}
public void keyTyped(KeyEvent key){
char enter=key.getKeyChar();
key.consume();
String st=txt.getText();
switch(enter){
case 'a':
txt.setText(st+"\u0627");
break;
case 'b':
txt.setText(st+"\u0628");
break;
case 'c':
txt.setText(st+"\u0686");
break;
case 'd':
txt.setText(st+"\u062F");
break;
case 'e':
txt.setText(st+"\u0639");
break;
case 'f':
txt.setText(st+"\u0641");
break;
case 'g':
txt.setText(st+"\u06AF");
break;
case 'h':
txt.setText(st+"\u06BE");
break;
case 'i':
txt.setText(st+"\u064A");
break;
case 'j':
txt.setText(st+"\u062C");
break;
case 'k':
txt.setText(st+"\u06A9");
break;
case 'l':
txt.setText(st+"\u0644");
break;
case 'm':
txt.setText(st+"\u0645");
break;
case 'n':
txt.setText(st+"\u0646");
break;
case 'o':
txt.setText(st+"\u0665");
break;
case 'p':
txt.setText(st+"\u067E");
break;
case 'q':
txt.setText(st+"\u0642");
break;
case 'r':
txt.setText(st+"\u0631");
break;
case 's':
txt.setText(st+"\u0633");
break;
case 't':
txt.setText(st+"\u062A");
break;
case 'u':
txt.setText(st+"\u0674");
break;
case 'v':
txt.setText(st+"\u0637");
break;
case 'w':
txt.setText(st+"\u0648");
break;
case 'x':
txt.setText(st+"\u0634");
break;
case 'y':
txt.setText(st+"\u06D2");
break;
case 'z':
txt.setText(st+"\u0632");
break;
case 'A':
txt.setText(st+"\u0622");
break;
case 'B':
txt.setText(st+"\u0628");
break;
case 'C':
txt.setText(st+"\u062B");
break;
case 'D':
txt.setText(st+"\u0688");
break;
case 'E':
txt.setText(st+"\u0639");
break;
case 'F':
txt.setText(st+"\u0641");
break;
case 'G':
txt.setText(st+"\u063A");
break;
case 'H':
txt.setText(st+"\u062D");
break;
case 'I':
txt.setText(st+"\u0627");
break;
case 'J':
txt.setText(st+"\u0636");
break;
case 'K':
txt.setText(st+"\u062E");
break;
case 'L':
txt.setText(st+"\u0644");
break;
case 'M':
txt.setText(st+"\u0627");
break;
case 'N':
txt.setText(st+"\u06BA");
break;
case 'O':
txt.setText(st+"\u0629");
break;
case 'P':
txt.setText(st+"\u0654");
break;
case 'Q':
txt.setText(st+"\u0642");
break;
case 'R':
txt.setText(st+"\u0691");
break;
case 'S':
txt.setText(st+"\u0635");
break;
case 'T':
txt.setText(st+"\u0679");
break;
case 'U':
txt.setText(st+"\u0621");
break;
case 'V':
txt.setText(st+"\u0638");
break;
case 'W':
txt.setText(st+"\u0648");
break;
case 'Y':
txt.setText(st+"\u06D2");
break;
case 'Z':
txt.setText(st+"\u0630");
break;
case ' ':
txt.setText(st+" ");
break;
}
}
}
public void actionPerformed(ActionEvent e){
String title=e.getActionCommand();
if(title.compareTo("Open")==0){
JFileChooser chooser= new JFileChooser();
chooser.showOpenDialog(this);
String path= chooser.getSelectedFile().getAbsolutePath();
if(path!=null){
txt.setText("YOU selected file path = "+path);
try{
mf.showFile(path);
}catch(IOException eX){
System.out.println(" EXCEPTION CAUGHT "+eX);
}
}
}
else if(title.compareTo("Save")==0){
if(saveValue==0){
JFileChooser chooser= new JFileChooser();
int option=chooser.showSaveDialog(this);
File file=chooser.getSelectedFile();
fileName=file.getName();
System.out.println("saveD and option = "+option+" filename "+fileName);
if(option==0){
try{
mf.saveFile(txt.getText(),fileName);
saveValue=1;
}catch(Exception exe){;}
}
else{;}
}
else{
try{
mf.saveFile(txt.getText(),fileName);
}catch(Exception exe){
System.out.println(" EXCEPTION CAUGHT "+exe);
}
}
}
else if(title.compareTo("Save As")==0){
JFileChooser chooser= new JFileChooser();
int option=chooser.showSaveDialog(this);
File file=chooser.getSelectedFile();
fileName=file.getName();
System.out.println("saved and option = "+option+" filename "+fileName);
if(option==0){
try{
mf.saveFile(txt.getText(),fileName);
}catch(Exception exe){;}
}
}
else if(title.compareTo("Exit")==0){
setVisible(false);
System.exit(0);
}
else if(title.compareTo("Find")==0){
String inputValue = JOptionPane.showInputDialog("Find");
if(inputValue!=null){
String currentText=txt.getText();
if(currentText.toLowerCase().contains(inputValue.toLowerCase())){
JOptionPane.showMessageDialog(this, "String FOUND ");
}
else
JOptionPane.showMessageDialog(this, "String NOT FOUND ");
}
}
else if(title.compareTo("Replace")==0){
String findValue = JOptionPane.showInputDialog("Find");
String currentText;
if(findValue!=null){
currentText=txt.getText();
if(currentText.toLowerCase().contains(findValue.toLowerCase())){
String replaceValue = JOptionPane.showInputDialog("Replace");
String replaceText = currentText.replace(findValue,replaceValue);
txt.setText(replaceText);
}
else
JOptionPane.showMessageDialog(this, "STRING IS NOT FOUND ");
}
}
else if(title.compareTo("Wrap")==0){
if(wrap.getState()){
txt.setLineWrap(true);
}
else{
txt.setLineWrap(false);
}
}
}
private class MyFiling{
public void showFile(String path)throws IOException{
File f=new File(path);
FileInputStream fst=new FileInputStream(f);
int i=0;
String text="";
while((i=fst.read())!=-1){
text=text+(char)i;
}
txt.setText(text);
fst.close();
}
public void saveFile(String text,String name)throws Exception{
name=name+".txt";
FileOutputStream out=new FileOutputStream(name);
out.write(text.getBytes());
out.close();
}
}
}
'case'a'： txt.setText（st +「\ u0627」）;'背後有什麼想法？ –