JTextPane突出显示文本

发布于 2024-11-02 04:42:30 字数 135 浏览 1 评论 0原文

我可以将一些文本突出显示到 JTextPane 中,从一个值开始并从另一个值结束 像下面这样但是颜色是黄色的?

”” JTextPane 突出显示文本“”

谢谢。

Can I highlight some text into a JTextPane starting from a value and ending from another value
like the following but with the yellow color?

""
JTextPane highlight text ""

Thanks.

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尬尬 2024-11-09 04:42:30

通常有几种可能性,具体取决于“突出显示”的真正含义:-)

通过更改文档级别上任意文本部分的任何样式属性来突出显示,例如

    SimpleAttributeSet sas = new SimpleAttributeSet();
    StyleConstants.setForeground(sas, Color.YELLOW);
    doc.setCharacterAttributes(start, length, sas, false);

通过文本窗格级别上的荧光笔突出显示:

    DefaultHighlighter.DefaultHighlightPainter highlightPainter = 
        new DefaultHighlighter.DefaultHighlightPainter(Color.YELLOW);
    textPane.getHighlighter().addHighlight(startPos, endPos, 
            highlightPainter);

As often there are several possibilities, depending on what you really mean by "highlight":-)

Highlight by changing any style attributes of arbitrary text parts on the document level, something like

    SimpleAttributeSet sas = new SimpleAttributeSet();
    StyleConstants.setForeground(sas, Color.YELLOW);
    doc.setCharacterAttributes(start, length, sas, false);

Highlight via a Highlighter on the textPane level:

    DefaultHighlighter.DefaultHighlightPainter highlightPainter = 
        new DefaultHighlighter.DefaultHighlightPainter(Color.YELLOW);
    textPane.getHighlighter().addHighlight(startPos, endPos, 
            highlightPainter);
她比我温柔 2024-11-09 04:42:30

https: //web.archive.org/web/20120530071821/http://www.exampledepot.com/egs/javax.swing.text/style_HiliteWords.html

JTextArea textComp = new JTextArea();

// Highlight the occurrences of the word "public"
highlight(textComp, "public");

// Creates highlights around all occurrences of pattern in textComp
public void highlight(JTextComponent textComp, String pattern)
{
    // First remove all old highlights
    removeHighlights(textComp);

    try
    {
        Highlighter hilite = textComp.getHighlighter();
        Document doc = textComp.getDocument();
        String text = doc.getText(0, doc.getLength());
        int pos = 0;

        // Search for pattern
        // see I have updated now its not case sensitive 
        while ((pos = text.toUpperCase().indexOf(pattern.toUpperCase(), pos)) >= 0)
        {
            // Create highlighter using private painter and apply around pattern
            hilite.addHighlight(pos, pos+pattern.length(), myHighlightPainter);
            pos += pattern.length();
        }
    } catch (BadLocationException e) {
    }
}

// Removes only our private highlights
public void removeHighlights(JTextComponent textComp)
{
    Highlighter hilite = textComp.getHighlighter();
    Highlighter.Highlight[] hilites = hilite.getHighlights();
    for (int i=0; i<hilites.length; i++)
    {
        if (hilites[i].getPainter() instanceof MyHighlightPainter)
        {
            hilite.removeHighlight(hilites[i]);
        }
    }
}

// An instance of the private subclass of the default highlight painter
Highlighter.HighlightPainter myHighlightPainter = new MyHighlightPainter(Color.red);

// A private subclass of the default highlight painter
class MyHighlightPainter extends DefaultHighlighter.DefaultHighlightPainter
{
    public MyHighlightPainter(Color color)
    {
        super(color);
    }
}

https://web.archive.org/web/20120530071821/http://www.exampledepot.com/egs/javax.swing.text/style_HiliteWords.html

JTextArea textComp = new JTextArea();

// Highlight the occurrences of the word "public"
highlight(textComp, "public");

// Creates highlights around all occurrences of pattern in textComp
public void highlight(JTextComponent textComp, String pattern)
{
    // First remove all old highlights
    removeHighlights(textComp);

    try
    {
        Highlighter hilite = textComp.getHighlighter();
        Document doc = textComp.getDocument();
        String text = doc.getText(0, doc.getLength());
        int pos = 0;

        // Search for pattern
        // see I have updated now its not case sensitive 
        while ((pos = text.toUpperCase().indexOf(pattern.toUpperCase(), pos)) >= 0)
        {
            // Create highlighter using private painter and apply around pattern
            hilite.addHighlight(pos, pos+pattern.length(), myHighlightPainter);
            pos += pattern.length();
        }
    } catch (BadLocationException e) {
    }
}

// Removes only our private highlights
public void removeHighlights(JTextComponent textComp)
{
    Highlighter hilite = textComp.getHighlighter();
    Highlighter.Highlight[] hilites = hilite.getHighlights();
    for (int i=0; i<hilites.length; i++)
    {
        if (hilites[i].getPainter() instanceof MyHighlightPainter)
        {
            hilite.removeHighlight(hilites[i]);
        }
    }
}

// An instance of the private subclass of the default highlight painter
Highlighter.HighlightPainter myHighlightPainter = new MyHighlightPainter(Color.red);

// A private subclass of the default highlight painter
class MyHighlightPainter extends DefaultHighlighter.DefaultHighlightPainter
{
    public MyHighlightPainter(Color color)
    {
        super(color);
    }
}
南城旧梦 2024-11-09 04:42:30

是的,您可以通过JTextPane继承自JTextComponent的函数setSelectionStartsetSelectionEnd


JTextComponent.setSelectionStart 的 javadoc

Yes you can via the functions setSelectionStart and setSelectionEnd from JTextComponent which JTextPane inherits from.

see
javadoc of JTextComponent.setSelectionStart

热鲨 2024-11-09 04:42:30

您是否尝试过java的字符串比较方法

.equalsIgnoreCase("Search Target Text")

因为该方法允许搜索而无需考虑字符串的大小写
这可能是您想要实现的目标

希望这对您有帮助 Makky

Did you try java's string comparison method

.equalsIgnoreCase("Search Target Text")

Because this method allows a search without having to take the case of a string into account
This might be the ticket to what you are trying to achieve

Hope this helps you Makky

給妳壹絲溫柔 2024-11-09 04:42:30

从性能角度来看,最好将 toUpperCase 放在

String text = doc.getText(0, doc.getLength()); 上

而不是在 while 循环中

,但感谢您提供了一个很好的例子。

performance wise its better to put the toUpperCase on

String text = doc.getText(0, doc.getLength());

rather than in the while loop

but thanks for the good example.

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