每當我在JTextPane中寫入特定單詞時指定文本顏色

Question

有沒有一種方法可以指定我寫文本時需要的顏色？假設我將「Apple」設置爲紅色。如果我在JTextPane中編寫「這個Apple是很好的Apple」，那麼「apple」這個詞應該變成紅色。

這是我到目前爲止，但它只是顯示全黑。我想讓單詞Apple顯示爲紅色

public static void main(String[] args) { 
    JTextPane textPane = new JTextPane(); 
    //Would like to make the words Apple Red in foreground color 
    textPane.setText("this Apple is good Apple"); 


    JFrame frame = new JFrame("Test"); 
    frame.getContentPane().add(textPane); 
    frame.pack(); 
    frame.setVisible(true); 
} 

Answer 1

這是一個使用單詞到顏色映射的解決方案。正如你所看到的，我映射apple爲紅色，字​​對綠色

public class Test { 

    HashMap<String, Color> myMap = new HashMap<String, Color>(); 

    public static void main(String[] args) { 
     new Test(); 
    } 

    public Test() { 
     myMap.put("apple", Color.RED); 
     myMap.put("apples", Color.RED); 
     myMap.put("green", Color.GREEN); 
     String text = "This is a green apple and I like to eat Apples"; 

     JTextPane textPane = new JTextPane(); 
     StyledDocument doc = textPane.getStyledDocument(); 



     Style style = textPane.addStyle("Red Style", null); 
     StyleConstants.setForeground(style, Color.red); 
     ArrayList<Chunk> chunks = getColorsBasedOnText(text, textPane); 
     try { 
      for (Chunk chunk : chunks) { 
       doc.insertString(doc.getLength(), chunk.text + " ", chunk.style); 
      } 
     } catch (BadLocationException e) { 
     } 

     JFrame frame = new JFrame("Test"); 
     frame.getContentPane().add(textPane); 
     frame.pack(); 
     frame.setVisible(true); 
    } 

    private ArrayList<Chunk> getColorsBasedOnText(String text, JTextPane textPane) { 
     ArrayList<Chunk> chunks = new ArrayList<Chunk>(); 
     for (String word: text.split(" ")) { 
      Chunk chunk = new Chunk(); 
      chunk.text = word; 
      Color color = myMap.get(word.toLowerCase()); 
      if (color != null) { 
       chunk.style = textPane.addStyle("Style", null); 
       StyleConstants.setForeground(chunk.style, color); 
      } 
      chunks.add(chunk); 
     } 
     return chunks; 
    } 

    private class Chunk { 
     public String text; 
     public Style style; 
    } 

Answer 2

這是一個快速通過。需要解析字符串並根據匹配值設置樣式，但這裏是一個開始。

public static void main(String[] args) { 
    JTextPane textPane = new JTextPane(); 
    StyledDocument doc = textPane.getStyledDocument(); 

    Style style = textPane.addStyle("Red Style", null); 
    StyleConstants.setForeground(style, Color.red); 

    try { 
     doc.insertString(doc.getLength(), "This ", null); 
     doc.insertString(doc.getLength(), "Apple", style); 
     doc.insertString(doc.getLength(), " is a good ", null); 
     doc.insertString(doc.getLength(), "Apple", style); 
    } catch (BadLocationException e) { 
    } 

    JFrame frame = new JFrame("Test"); 
    frame.getContentPane().add(textPane); 
    frame.pack(); 
    frame.setVisible(true); 
}