如何在JEditorPane中打开java，python，其他文件

Question

所以我想知道如何在java文本窗格中主动更改关键字的颜色。我理解必须使用文档监听器，但目前它似乎没有工作，实际上把它放在文件监听器中导致我无法正常打开文件或颜色。那么我怎样才能主动调用一个改变java中关键字颜色的方法。这是搜索关键字的代码，它在我打开文件时起作用，而不是主动。

public void findKeyWords(String directory) throws FileNotFoundException
{
  final StyleContext cont = StyleContext.getDefaultStyleContext();
  final AttributeSet jKeyWord = cont.addAttribute(cont.getEmptySet(), 
     StyleConstants.Foreground,Color.RED);
  final AttributeSet jOperator = cont.addAttribute(cont.getEmptySet(), 
     StyleConstants.Foreground,Color.MAGENTA);
  final AttributeSet jtypes = cont.addAttribute(cont.getEmptySet(), 
     StyleConstants.Foreground,Color.CYAN);

     ArrayList<String> words = loadKeyWords(directory);
     for (String line : words)
     {
        searchJava(line,jKeyWord);
     }
     ArrayList<String> operators = loadOperators(directory);
     for (String line : operators)
     {
        searchJava(line, jOperator);
     }
     ArrayList<String> types1 = loadTypes(directory);
     for (String line : types1)
     {
        searchJava(line, jtypes);
     }
}
private ArrayList<String> loadKeyWords(String directory) throws FileNotFoundException
{
  ArrayList<String> javaWords = new ArrayList<String>();
  final String dir = System.getProperty("user.dir");
  File file = new File(dir + "/" + directory + "/keywords.txt");
  Scanner scan = new Scanner(file);
  while(scan.hasNext())
  {
     javaWords.add(scan.next() + " ");
  }
  scan.close();
  return javaWords;
}
private ArrayList<String> loadOperators(String directory) throws FileNotFoundException
{
  ArrayList<String> javaWords = new ArrayList<String>();
  final String dir = System.getProperty("user.dir");
  File file = new File(dir + "/" + directory + "/operators.txt");
  Scanner scan = new Scanner(file);
  while(scan.hasNext())
  {
     javaWords.add(scan.next());
  }
  scan.close();
  return javaWords;
}
private ArrayList<String> loadTypes(String directory) throws FileNotFoundException
{
  ArrayList<String> javaWords = new ArrayList<String>();
  final String dir = System.getProperty("user.dir");
  File file = new File(dir + "/" + directory + "/types.txt");
  Scanner scan = new Scanner(file);
  while(scan.hasNext())
  {
     javaWords.add(" " + scan.next());
  }
  scan.close();
  return javaWords;
}
 public void searchJava(String wordToSearch, AttributeSet javaAttr) 
{ 

  final AttributeSet attr = javaAttr;
  Document text = textArea.getDocument();

  int m;
  int t;
  int total = 0;
  for (String line : textArea.getText().split("\n")) 
  {
     m = line.indexOf(wordToSearch);
     if(m == -1)
     {
        if(isUnix())
        {
        total += line.length() + 1;
        }
        else if(isWindows())
        {
           total += line.length();
        }
        else if(isMac())
        {
           total += line.length() + 1;
        }
        else
        {
           total += line.length() + 1;
        }
        continue;
     }
     try{
     text.remove(total + m, wordToSearch.length());

     text.insertString(total + m, wordToSearch, attr);
     }catch(BadLocationException ex)
     {}
     while(true)
     {
        m = line.indexOf(wordToSearch, m + 1 );

        if (m == -1)
        {
           break;
        }
        try
        {
        text.remove(total + m, wordToSearch.length());

        text.insertString(total + m, wordToSearch, attr);
        }catch(BadLocationException e)
        {
        }
     }
     if(isUnix())
        {
           total += line.length() + 1;

        }
        else if(isWindows())
        {
           total += line.length();
        }
        else if(isMac())
        {
           total += line.length() + 1;
        }
        else
        {
           JOptionPane.showMessageDialog(null, "Eric You Troll" );
           total += line.length() + 1;
        }
  }

}