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How can I check if there are any selected items in Java JList
To check if there are any selected items, use the following:
boolean res = !list.isSelectionEmpty();
The value of res would be TRUE IF we have a selected item in the JList.
The following is an example to check if there are any selected items in JList:
Example
package my;
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
class SwingDemo extends JFrame {
static JFrame frame;
static JList list;
public static void main(String[] args) {
frame = new JFrame("JList Demo");
SwingDemo s = new SwingDemo();
JPanel panel = new JPanel();
String sports[]= {"Squash","Fencing","Cricket","Football","Hockey","Rugby"};
list = new JList(sports);
list.setSelectedIndex(4);
boolean res = !list.isSelectionEmpty();
System.out.println(res);
panel.add(list);
frame.add(panel);
frame.setSize(550,300);
frame.setVisible(true);
}
}Output
The output in the console would be TRUE since we have found a selected item in the JList.
Updated on: 30-Jul-2019
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