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今天我为朋友制作了一个 URDu（类似阿拉伯语的语言）的记事本编辑器......我想出的代码很长，我认为这不是正确的方法，特别是其中的 Switch Cases.. 有吗在 JFrame->JTextPanel 上直接写入 UTF-8 字符的任何其他方式

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();
    }
}
}
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1 回答 1

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您在读取/写入文件时遇到问题，而不是 JTextArea。

请使用Reader/Writer来读取或写入文本文件。以正确的编码使用它们，一切都应该没问题。在内部，java 使用 UTF-16，转换应该由 aReader或 a完成Writer。

目前，您正在从流中读取字节并尝试将它们视为几乎总是会导致错误的字符。

于 2012-12-18T07:07:54.557 回答