如何在JTextPane中重新绘制彩色文本，使其恢复到默认颜色

Question

public void setJTextPane(JTextPane jtp, Color c, int from, int to) {
    // Start with the current input attributes for the JTextPane. This
    // should ensure that we do not wipe out any existing attributes
    // (such as alignment or other paragraph attributes) currently
    // set on the text area.
    StyleContext sc = StyleContext.getDefaultStyleContext();
    AttributeSet attrs = sc.addAttribute(SimpleAttributeSet.EMPTY, StyleConstants.Foreground, c);
    // Set the font color
    // Retrieve the pane's document object
    StyledDocument doc = jtp.getStyledDocument();
    // Replace the style for the entire document. We exceed the length
    // of the document by 1 so that text entered at the end of the
    // document uses the attributes.
    doc.setCharacterAttributes(from, to, attrs, true);
}
public void recoverTextPane(JTextPane jtp, int from, int to) {
    StyleContext sc = StyleContext.getDefaultStyleContext();
    AttributeSet attrs = sc.addAttribute(SimpleAttributeSet.EMPTY, StyleConstants.Foreground, 
            new Color(51,51,51));
    StyledDocument doc = jtp.getStyledDocument();
    doc.setCharacterAttributes(from, to, attrs, true);
}

setJTextPane的目的是在两个索引之间绘制JTextPane的特定线。该函数按预期正常工作。但是，我想将这一行文本转换回其原始颜色。所以我基本上创建了一个单独的函数将这条线转换为已知的RGB。然而，这对文本没有任何影响。有人能诊断出代码的问题吗?

谢谢你的帮助!

Answer 1

SimplaAttributeSet attrs = new SimpleAttributeSet();
StyleConstants.setForeground(attrs, theColor);
StyledDocument doc = jtp.getStyledDocument();
doc.setCharacterAttributes(from, to, attrs, false);

您创建空属性集，指定前景色并应用它而不替换原始属性。检查from和to参数以覆盖正确的片段。