import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Container;
import javax.swing.DefaultListCellRenderer;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.ListCellRenderer;
import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;
import javax.swing.border.LineBorder;
import javax.swing.border.TitledBorder;
public class CustomBorderSample {
public static void main(String args[]) {
String labels[] = { "A", "B", "C", "D","E", "F", "G", "H","I", "J" };
JFrame frame = new JFrame("Custom Border");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container contentPane = frame.getContentPane();
JList jlist = new JList(labels);
ListCellRenderer renderer = new FocusedTitleListCellRenderer();
jlist.setCellRenderer(renderer);
JScrollPane sp = new JScrollPane(jlist);
contentPane.add(sp, BorderLayout.CENTER);
frame.setSize(300, 200);
frame.setVisible(true);
}
}
class FocusedTitleListCellRenderer implements ListCellRenderer {
protected static Border noFocusBorder = new EmptyBorder(15, 1, 1, 1);
protected static TitledBorder focusBorder = new TitledBorder(LineBorder
.createGrayLineBorder(), "Focused");
protected DefaultListCellRenderer defaultRenderer = new DefaultListCellRenderer();
public String getTitle() {
return focusBorder.getTitle();
}
public void setTitle(String newValue) {
focusBorder.setTitle(newValue);
}
public Component getListCellRendererComponent(JList list, Object value,
int index, boolean isSelected, boolean cellHasFocus) {
JLabel renderer = (JLabel) defaultRenderer
.getListCellRendererComponent(list, value, index, isSelected,
cellHasFocus);
renderer.setBorder(cellHasFocus ? focusBorder : noFocusBorder);
return renderer;
}
}