我正在尝试渲染一个java.text.AttributedString,它既是粗体又是上标。虽然它可以使一些范围,无论是粗体还是迷信,渲染似乎不能处理的范围是粗体和上标。
下面的SSCCE显示,使用带有HTML的JLabel来呈现这一点很好。有没有办法在没有JLabel的情况下获得这种行为?
顺便说一句,我查看了创建的AttributedString属性,它们在我看来还不错,所以这无疑是一个呈现问题。
package funky.chart;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.font.TextAttribute;
import java.text.AttributedString;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;
public class AttributedStringTest
{
public static void main(String[] args) {
// prevent using the default UI manager who renders in bold by default for the HTML label
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception ex) {
System.err.println("Could not set look and feel: " + ex);
}
JFrame frame = new JFrame("AttributedString superscript with font");
frame.getContentPane().add(new JPanel() {
@Override
public void paint(Graphics gfx) {
super.paint(gfx);
Font bold = gfx.getFont().deriveFont(Font.BOLD);
// superscript and bold only works fine
AttributedString test1 = new AttributedString("test superscript and bold");
test1.addAttribute(TextAttribute.SUPERSCRIPT, TextAttribute.SUPERSCRIPT_SUPER, 5, 16);
test1.addAttribute(TextAttribute.FONT, bold, 21, 25);
// both superscript and bold is only rendered as bold
AttributedString test2 = new AttributedString("test superscript and bold");
test2.addAttribute(TextAttribute.SUPERSCRIPT, TextAttribute.SUPERSCRIPT_SUPER, 5, 25);
test2.addAttribute(TextAttribute.FONT, bold, 5, 25);
gfx.drawString(test1.getIterator(), 5, 20);
gfx.drawString(test2.getIterator(), 5, 40);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 70);
}
});
// HTML label works fine
frame.getContentPane().add(
new JLabel("<html>test <b>bold</b>, <sup>super</sup> and <b><sup>both</sup></b>"),
BorderLayout.SOUTH);
frame.pack();
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setVisible(true);
}
}发布于 2015-07-11 19:05:27
关于您的完整示例,请注意:
TextAttribute.WEIGHT指定粗体。TextAttribute.SIZE指定字体大小。TextLayout计算首选大小,如这里所示。paintComponent(),而不是覆盖paint()。“-http://www.oracle.com/technetwork/java/painting-140037.html#callbacks。

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.font.TextAttribute;
import java.text.AttributedString;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
/** @see https://stackoverflow.com/a/31360762/230513 */
public class AttributedStringTest {
public static void main(String[] args) {
EventQueue.invokeLater(new AttributedStringTest()::display);
}
private void display() {
JFrame frame = new JFrame("AttributedString superscript with font");
frame.getContentPane().add(new JPanel() {
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
// superscript and bold only works fine
AttributedString test1 = new AttributedString("test superscript and bold");
test1.addAttribute(TextAttribute.SIZE, 28, 0, 25);
test1.addAttribute(TextAttribute.SUPERSCRIPT, TextAttribute.SUPERSCRIPT_SUPER, 5, 16);
test1.addAttribute(TextAttribute.WEIGHT, TextAttribute.WEIGHT_BOLD, 21, 25);
// both superscript and bold is only rendered as bold
AttributedString test2 = new AttributedString("test superscript and bold");
test2.addAttribute(TextAttribute.SIZE, 28, 0, 25);
test2.addAttribute(TextAttribute.SUPERSCRIPT, TextAttribute.SUPERSCRIPT_SUPER, 5, 25);
test2.addAttribute(TextAttribute.WEIGHT, TextAttribute.WEIGHT_BOLD, 5, 25);
g.drawString(test1.getIterator(), 5, 35);
g.drawString(test2.getIterator(), 5, 70);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(300, 80);
}
});
// HTML label works fine
frame.getContentPane().add(new JLabel(
"<html>test <b>bold</b>, <sup>super</sup> and <b><sup>both</sup></b>", JLabel .CENTER),
BorderLayout.SOUTH);
frame.pack();
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setVisible(true);
}
}https://stackoverflow.com/questions/31359512
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