Swing/DifferentCellHeight のバックアップの現在との差分(No.1)

#spanend
#spanadd
class TextAreaRenderer<E extends String> extends JTextArea
#spanend
                                         implements ListCellRenderer<E> {
  private static final Color EVEN_COLOR = new Color(230, 255, 230);
  private Border noFocusBorder;
  private Border focusBorder;

#spandel
#screenshot
#spanend
  @Override public Component getListCellRendererComponent(
      JList<? extends E> list, E value, int index,
      boolean isSelected, boolean cellHasFocus) {
    // setLineWrap(true);
    setText(Objects.toString(value, ""));
    if (isSelected) {
      // Nimbus
      setBackground(new Color(list.getSelectionBackground().getRGB()));
      setForeground(list.getSelectionForeground());
    } else {
      setBackground(index % 2 == 0 ? EVEN_COLOR : list.getBackground());
      setForeground(list.getForeground());
    }
    if (cellHasFocus) {
      setBorder(focusBorder);
    } else {
      setBorder(noFocusBorder);
    }
    return this;
  }

#spandel
**サンプルコード [#r38aaded]
#spanend
 class TextAreaRenderer extends JTextArea implements ListCellRenderer {
   private final Border border = new DotBorder(2,2,2,2);
   private final Color evenColor = new Color(230,255,230);
   public Component getListCellRendererComponent(
       JList list, Object object, int index,
       boolean isSelected, boolean cellHasFocus) {
     setText((object==null) ? "" : object.toString());
     setBorder(cellHasFocus ? border 
                 : BorderFactory.createEmptyBorder(2,2,2,2));
     if(isSelected) {
       setBackground(list.getSelectionBackground());
       setForeground(list.getSelectionForeground());
     }else{
       setBackground(index%2==0 ? evenColor : list.getBackground());
       setForeground(list.getForeground());
     }
     return this;
   }
 }
 
 private DefaultListModel makeList() {
   DefaultListModel model = new DefaultListModel();
   model.addElement("一行");
   model.addElement("一行目\n二行目");
   model.addElement("一行目\n二行目\n三行目");
   model.addElement("四行\n以上ある\nテキスト\nの場合");
   return model;
 }
  @Override public void updateUI() {
    super.updateUI();
    focusBorder = UIManager.getBorder("List.focusCellHighlightBorder");
    noFocusBorder = UIManager.getBorder("List.noFocusBorder");
    if (Objects.isNull(noFocusBorder) && Objects.nonNull(focusBorder)) {
      Insets i = focusBorder.getBorderInsets(this);
      noFocusBorder = BorderFactory.createEmptyBorder(
          i.top, i.left, i.bottom, i.right);
    }
  }
#spanadd
}
#spanend

-&jnlp;
-&jar;
-&zip;
#spanadd
private DefaultListModel makeList() {
#spanend
  DefaultListModel model = new DefaultListModel();
  model.addElement("一行");
  model.addElement("一行目\n二行目");
  model.addElement("一行目\n二行目\n三行目");
  model.addElement("四行\n以上ある\nテキスト\nの場合");
  return model;
#spanadd
}
#spanend
#spanadd