解决方法
查看java.text.AttributedString,它支持下标等等.例如,在你的paintComponent()你可以去：
public void paintComponent(Graphics g) {
super.paintComponent(g);
AttributedString as = new AttributedString("I love you 104 gazillion");
as.addAttribute(TextAttribute.SUPERSCRIPT,TextAttribute.SUPERSCRIPT_SUPER,13,14);
as.addAttribute(TextAttribute.FOREGROUND,Color.RED,2,6);
g.drawString(as.getIterator(),20,20);
}
