我可以在Java Swing中使用CSS吗？

Java swing通常不是为了将其控件与其表示形式分开而构建的，但是已经编写了一个名为Jaxx的开源框架，可能会对您有所帮助。使用Jaxx，您可以执行如下操作：

<Application title='Calculator'>
  <style source='Calculator.css'/> //your style goes here...
  <script source='Calculator.script'/>
  <Table fill='both' id='table'>
<row>
  <cell columns='4'><JLabel id='display' text='0'/></cell>
</row>

<row>
  <cell columns='2'><JButton id='c' label='C' onActionPerformed='clear()' styleClass='clear'/></cell>      
  <cell><JButton id='ce'     label='CE' onActionPerformed='clearEntry()' styleClass='clear'/></cell>
  <cell><JButton id='equals' label='=' onActionPerformed='equal()' styleClass='operator'/></cell>
</row>

<row>
  <cell><JButton id='d7'   label='7' onActionPerformed='digit(7)' styleClass='digit'/></cell>
  <cell><JButton id='d8'   label='8' onActionPerformed='digit(8)' styleClass='digit'/></cell>
  <cell><JButton id='d9'   label='9' onActionPerformed='digit(9)' styleClass='digit'/></cell>
  <cell><JButton id='plus' label='+' onActionPerformed='add()' styleClass='operator'/></cell>
</row>

<row> 
  <cell><JButton id='d4'       label='4' onActionPerformed='digit(4)'   styleClass='digit'/></cell>
  <cell><JButton id='d5'       label='5' onActionPerformed='digit(5)'   styleClass='digit'/></cell>
  <cell><JButton id='d6'       label='6' onActionPerformed='digit(6)'   styleClass='digit'/></cell>
  <cell><JButton id='subtract' label='-' onActionPerformed='subtract()' styleClass='operator'/></cell>
</row>

<row>
  <cell><JButton id='d1'       label='1' onActionPerformed='digit(1)' styleClass='digit'/></cell>
  <cell><JButton id='d2'       label='2' onActionPerformed='digit(2)' styleClass='digit'/></cell>
  <cell><JButton id='d3'       label='3' onActionPerformed='digit(3)' styleClass='digit'/></cell>
  <cell><JButton id='multiply' label='x' onActionPerformed='multiply()' styleClass='operator'/></cell>
</row>

<row>
  <cell><JButton id='d0'     label='0' onActionPerformed='digit(0)' styleClass='digit'/></cell>
  <cell><JButton id='sign'   label='+/-' onActionPerformed='toggleSign()' styleClass='operator'/></cell>
  <cell><JButton id='dot'    label='.' onActionPerformed='dot()' styleClass='digit'/></cell>
  <cell><JButton id='divide' label='&#x00F7;' onActionPerformed='divide()' styleClass='operator'/></cell>
</row>

然后包含一个 css 文件来设置组件的样式：

Application {
    lookAndFeel: system;
}
#display {
    background: #BCE5AD;
    opaque: true;
    horizontalAlignment: right;
    border: {BorderFactory.createBevelBorder(BevelBorder.LOWERED)};
    font-size: 22;
    font-weight: bold;
}

http://code.google.com/p/flying-saucer/Flying Saucer采用XML或XHTML，并对其应用符合CSS 2.1标准的样式表，以便使用Swing或SWT呈现为PDF（通过iText），图像和屏幕