JList，可否给指定项设置字体和颜色？！

Question

JList jlistSpec = new JList(this.getListItemSpecs());
jlistSpec.setFont(new java.awt.Font("宋体",java.awt.Font.PLAIN,12));
jlistSpec.setBackground(Color.yellow);//以上设置字体和颜色是针对整个jlistSpec ,
有没有办法可以只设置某些项的字体和背景颜色的？？？？

Answer 1

setCellRenderer(ListCellRenderer cellRenderer)
class SpecCellRenderer
    implements ListCellRenderer {
  int i = 0;
  public Component getListCellRendererComponent(final JList list,
                                                final Object value,
                                                final int index,
                                                final boolean isSelected,
                                                final boolean cellHasFocus) {
    return new JPanel() {
      public void paintComponent(Graphics g) {
        FontMetrics fm = g.getFontMetrics();        
        g.setColor(isSelected
                   ? list.getSelectionBackground()
                   : list.getBackground()
                   );        
        g.fillRect(0, 0, getWidth(), getHeight());
//        g.setColor(isSelected
//                   ? list.getSelectionForeground()
//                   : list.getForeground()
//                   );//        g.setColor(i==0
//                   ? Color.blue
//                   : Color.orange
//                   );
        i = i==0?1:0;
      }      public Dimension getPreferredSize() {
        Font font = (Font) value;
        String text = font.getFamily();
        Graphics g = getGraphics();
        FontMetrics fm = g.getFontMetrics(font);
        return new Dimension(fm.stringWidth(text), fm.getHeight());
      }    };
  }
}

Answer 2

import java.awt.*;import javax.swing.*;public class ListCellRendererTest
{ public static void main(String[] args)
{
JList list = new JList(new String[] {"Item-1", "Item2", "Item3"});
list.setCellRenderer(new MyRenderer());
JScrollPane sp = new JScrollPane(list);
JFrame f = new JFrame();
f.getContentPane().add(sp, BorderLayout.CENTER);
f.pack();
f.setLocationRelativeTo(null);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.show();
}

private static class MyRenderer extends DefaultListCellRenderer
{
private Font font1;
private Font font2; public MyRenderer()
{
this.font1 = getFont();
this.font2 = font1.deriveFont((float)(font1.getSize() + 10));
}

public Component getListCellRendererComponent(JList list, Object value, 
int index, boolean isSelected, boolean cellHasFocus)
{
super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
if (index == 1) {
setBackground(Color.lightGray);
}
setFont(index == 2 ? font2 : font1); return this;
}
}
}