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import javax.swing.*;
import java.awt.*;
class Rectangle
{
Color clr;
Rectangle(Color clr)
{
this.clr = clr;
}
}
public class ListRect
{
public static void main(String[] args)
{
Rectangle[] rects = {new Rectangle(Color.BLACK), new Rectangle(Color.RED),
new Rectangle(Color.BLUE), new Rectangle(Color.GREEN)};
final JList list = new JList(rects);
list.setCellRenderer(new ListCellRenderer()
{
public Component getListCellRendererComponent(JList list, Object value,
int index, boolean isSelected, boolean cellHasFocus)
{
JLabel lbl = new JLabel();
lbl.setOpaque(true);
Rectangle r = (Rectangle)value;
lbl.setPreferredSize(new Dimension(40, 20));
lbl.setBackground(r.clr);
return lbl;
}
});
JFrame frm = new JFrame();
frm.add(list);
frm.setSize(100, 400);
frm.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frm.setVisible(true);
}
} |
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