如何在MouseEnter上为JLabel加上下划线

Question

I tried to change the font, by using: 我试图通过使用以下方式更改字体：

jLabel.setFont(new Font("Tahoma",1,20));

But there's only 4 styles here, Plain, Bold, Italic, Bold+Italic. 但是这里只有4种样式，即Plain，Bold，Italic，Bold + Italic。

I want it to work like a link in HTML, the JLabel gets underlined when I hover the mouse cursor on it. 我希望它像HTML中的链接一样工作，当我将鼠标指针悬停在JLabel上时，JLabel会带有下划线。

Answer 1

To clarify (or not :-) the confusion introduced in my comments to mKorbel 为了澄清（或不:-）我对mKorbel的评论中引入的困惑

Never create a Font out of the blue: it will most probably clash with all other fonts in the application. 切勿突然创建字体：它很可能会与应用程序中的所有其他字体冲突。 Instead, grab the default (either from the component instance as in the snippet shown below or the UIManager, doesn't matter) and derive. 取而代之的是，获取默认值（从下面的片段中的组件实例或UIManager中获取，都没有关系）并派生。

For deriving using attributes (shamelessly steeling from mKorbel's answer), that's something like 对于使用属性的推导（从mKorbel的答案中毫不客气地加固），这就像

JLabel label = new JLabel("some text - WE ARE UNDERLINED");
MouseListener l = new MouseAdapter() {
    Font original;

    @Override
    public void mouseEntered(MouseEvent e) {
        original = e.getComponent().getFont();
        Map attributes = original.getAttributes();
        attributes.put(TextAttribute.UNDERLINE, TextAttribute.UNDERLINE_ON);
        e.getComponent().setFont(original.deriveFont(attributes));
    }

    @Override
    public void mouseExited(MouseEvent e) {
        e.getComponent().setFont(original);
    }


};
label.addMouseListener(l);
JComponent content = new JPanel();
content.add(label);
content.add(new JButton("dummy focus"));

But beware: that will not yet give you any hyperlink functionality! 但是请注意：这还不会给您任何超链接功能！ So in case a Hyperlink is what you are really after, consider using a full-fledged component with such a functionality, like fi JXHyperlink in the SwingX project . 因此，如果您真正想要的是Hyperlink，请考虑使用具有这种功能的成熟组件，例如SwingX项目中的 fi JXHyperlink 。 You might want to run the demo referenced on its project home. 您可能要运行在其项目主目录上引用的演示。

Answer 2

use for proper MouseEvent 用于正确的MouseEvent

JLabel#setFont(new Font(attributes));

and back 然后回来

JLabel#setFont(new Font("Serif", Font.BOLD, 16));

wrapped into invokeLater , and from definitions 包装到invokeLater ，并来自定义

final Map attributes = (new Font("Serif", Font.BOLD, 16)).getAttributes();
attributes.put(TextAttribute.STRIKETHROUGH, TextAttribute.STRIKETHROUGH_ON);

Answer 3

Use this with required CSS, 将此与必需的CSS一起使用，

yourLabel.setText(htmlIfy("<p style='color:#1C66AE;'>Your text here</p>"));

where the htmlIfy function is htmlIfy函数在哪里

private static final String HTML = "<html>";
    private static final String HTML_END = "</html>";


public static String htmlIfy(String s) {
        return HTML.concat(s).concat(HTML_END);
    }

to add text like link use 添加文本，例如链接使用

yourLabel.setText(HTMLTagUtil.htmlIfy(HTMLTagUtil
                .linkIfy("Your Text Here")));//Forgot Password?

        yourLabel.setCursor(new java.awt.Cursor(
                java.awt.Cursor.HAND_CURSOR));

where the linkIfy function is linkIfy函数在哪里

private static final String A_HREF = "<a href=\"";
    private static final String HREF_CLOSED = "\">";
    private static final String HREF_END = "</a>";
public static String linkIfy(String s) {
        return A_HREF.concat(s).concat(HREF_CLOSED).concat(s).concat(HREF_END);
    }

Answer 4

 if (CheckBox.isSelected()) {
        Font font = CheckBox.getFont();
        Map attributes = font.getAttributes();
        attributes.put(TextAttribute.UNDERLINE, TextAttribute.UNDERLINE_LOW_GRAY);
        CheckBox.setFont(font.deriveFont(attributes));
    }

如何在MouseEnter上为JLabel加上下划线

问题描述

4 个解决方案

解决方案1
6 2012-09-12 15:05:30

解决方案2
4 2012-09-12 13:28:06

解决方案3
0 2012-09-12 13:23:52

解决方案4
0 2014-06-23 14:27:46

如何在MouseEnter上为JLabel加上下划线

问题描述

4 个解决方案

解决方案1 6 2012-09-12 15:05:30

解决方案2 4 2012-09-12 13:28:06

解决方案3 0 2012-09-12 13:23:52

解决方案4 0 2014-06-23 14:27:46

解决方案1
6 2012-09-12 15:05:30

解决方案2
4 2012-09-12 13:28:06

解决方案3
0 2012-09-12 13:23:52

解决方案4
0 2014-06-23 14:27:46