java - 如何不允许用户突出显示 JTextArea 中的文本？但是我只能突出显示文本吗？

Question

我不想让用户突出显示文本区域中存在的文本，但只有我可以修改存在的文本。我不希望用户能够在文本区域中复制和粘贴文本，但他必须仍然能够看到里面突出显示的单词。我已经尝试过这种方法：textArea.setHighlighter(null);但它不起作用

    class MyHighlightPainter extends DefaultHighlighter.DefaultHighlightPainter 
{
    public MyHighlightPainter(Color color) { super(color); }
}
Highlighter.HighlightPainter myHighlightPainter = new MyHighlightPainter(Color.yellow);

public void Highligh(JTextComponent textComp, String pattern) 
{
    try {
        Highlighter hilite = textComp.getHighlighter();
        Document doc = textComp.getDocument();
        String text = doc.getText(0, doc.getLength()), 
               upperText = text.toUpperCase(), upperPattern = pattern.toUpperCase();
        for(int pos = 0; (pos = upperText.indexOf(upperPattern, pos))>=0; pos += pattern.length())
            hilite.addHighlight(pos, pos+pattern.length(), myHighlightPainter);
    } catch (Exception e) {} 
}

vocabolario.addKeyListener(new KeyAdapter() {
            public void keyReleased(KeyEvent arg0) {
                textArea.setText("");
                 String[] parziale = new String[6000];
                 try {
                        String p1 = "SELECT definizione FROM Cherubini WHERE definizione LIKE '%", p2 = "%';", px = vocabolario.getText(), query = p1+px+p2;
                        ResultSet rs =  Main.conn().createStatement().executeQuery(query);
                        while(rs.next())
                        {
                             String[] dati =  { rs.getString("definizione") };
                             for(int i = 0; i < dati.length; i++) { 
                                 parziale[i] = dati[i]; 
                                 textArea.append(parziale[i]+"\n\n\n"); 
                             }
                        }
                        Highligh(textArea,vocabolario.getText()); 
                 }
                 catch(SQLException exc) {} 
            }

        });

标签： javaswingjtextarea

Answer 1

我认为这段代码有效：

textArea.getInputMap().put(KeyStroke.getKeyStroke("control C"), "none");