[英]How to change color to specific symbols in a JTextPane [java]
我正在嘗試制作一個JTextPane,其中包含一種文本編輯器,其中特定的單詞或符號具有不同的前景色或字體。 到目前為止,我已經找到了將顏色更改為單詞的方法,如下所示:
import javax.swing.*;
import java.awt.*;
import javax.swing.text.*;
public class Test extends JFrame {
private int findLastNonWordChar(String text, int index) {
while (--index >= 0) {
if (String.valueOf(text.charAt(index)).matches("\\W")) {
break;
}
}
return index;
}
private int findFirstNonWordChar(String text, int index) {
while (index < text.length()) {
if (String.valueOf(text.charAt(index)).matches("\\W")) {
break;
}
index++;
}
return index;
}
public Test() {
setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(400, 400);
setLocationRelativeTo(null);
final StyleContext cont = StyleContext.getDefaultStyleContext();
final AttributeSet attr = cont.addAttribute(cont.getEmptySet(), StyleConstants.Foreground, Color.RED);
final AttributeSet attrBlack = cont.addAttribute(cont.getEmptySet(), StyleConstants.Foreground, Color.BLACK);
DefaultStyledDocument doc = new DefaultStyledDocument() {
private static final long serialVersionUID = 1L;
@Override
public void insertString(int offset, String str, AttributeSet a) throws BadLocationException {
super.insertString(offset, str, a);
String text = getText(0, getLength());
int before = findLastNonWordChar(text, offset);
if (before < 0) {
before = 0;
}
int after = findFirstNonWordChar(text, offset + str.length());
int wordL = before;
int wordR = before;
while (wordR <= after) {
if (wordR == after || String.valueOf(text.charAt(wordR)).matches("\\W")) {
if (text.substring(wordL, wordR).matches("(\\W)*(private|public|protected)")) {
setCharacterAttributes(wordL, wordR - wordL, attr, false);
} else {
setCharacterAttributes(wordL, wordR - wordL, attrBlack, false);
}
wordL = wordR;
}
wordR++;
}
}
};
}
public static void main(String args[]) {
new Test();
}
}
我的問題是當符號' - >'的顏色應該改變時。 事實上,如果我把' - >'而不是'私人'或'公共'不起作用。 你能幫我找到辦法嗎? 謝謝
檢查以下示例(從以前的帖子中挑選):
public static void main(String[] args) {
JTextPane jtp = new JTextPane();
StyledDocument doc = jtp.getStyledDocument();
Style style = jtp.addStyle("Red coloured text", null);
StyleConstants.setForeground(style, Color.red);
try { doc.insertString(doc.getLength(), "Style text",style); }
catch (BadLocationException e){}
StyleConstants.setForeground(style, Color.blue);
try { doc.insertString(doc.getLength(), "Style text 2",style); }
catch (BadLocationException e){}
JFrame frame = new JFrame("ColourCheck");
frame.getContentPane().add(jtp);
frame.pack();
frame.setVisible(true);
}
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