I want to know how to start a JList
with the first item selected when I click a button.
Here is what I have:
if(e.getSource() ==bButton)
{
lQty.setSelectedIndex(0);
}
Sure it works. e.g.,
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
public class JListFun {
public static void main(String[] args) {
final JList<String> list = new JList<String>(new String[]{"one", "two", "three", "four", "five"});
JScrollPane scrollPane = new JScrollPane(list);
JButton btn = new JButton(new AbstractAction() {
{
putValue(NAME, "Press Me");
}
@Override
public void actionPerformed(ActionEvent evt) {
list.setSelectedIndex(0);
}
});
JPanel panel = new JPanel();
panel.add(scrollPane);
panel.add(btn);
JOptionPane.showMessageDialog(null, panel);
}
}
If it doesn't work for you, you need to show us with compilable runnable code as shown above.