Hi friend,

Code to help in solving the problem :

import javax.swing.*;
import java.awt.event.*;

public class DimensionItemList{
public static void main(String[] args) {
DimensionItemList di = new DimensionItemList();
}

public DimensionItemList(){
String name[] = {"aaa","bbb","ccc","ddd","eee"};
JFrame frame = new JFrame("Setting the Dimensions of an Item in a JList Component");
JPanel panel = new JPanel();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
DefaultListModel model = new DefaultListModel();
for(int i = 0; i < name.length; i++)
model.addElement(name[i]);
JList list = new JList(model){
public String getToolTipText(MouseEvent e) {
int index = locationToIndex(e.getPoint());
if (-1 < index) {
String item = (String)getModel().getElementAt(index);
return item;
} else {
return null;
}
}
};
list.setPrototypeCellValue("RoseIndia.net");
panel.add(list);
frame.add(panel);
frame.setSize(400,400);
frame.setVisible(true);
}
}

For more information on Swing visit to :

http://www.roseindia.net/java/example/java/swing/

Thanks