SO question 1693436

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

public class WhichOne {
    public static void main( String  [] args ) {
        JLabel [] labels = {
            new JLabel("one"),
            new JLabel("two"),
            new JLabel("three"),
        };
        JFrame f = new JFrame();

        JPanel panel = new JPanel();
        panel.addMouseListener( whichOneListener );

        f.setContentPane( panel );
        for( JLabel label : labels ) {
            f.add( label );
                }
        f.pack();
        f.setVisible( true );

    }
    private static MouseListener whichOneListener = new MouseAdapter() {
        public void mouseClicked( MouseEvent e ) {
            JComponent c = ( JComponent ) e.getSource();
            JLabel l  = ( JLabel ) c.getComponentAt( e.getPoint() );
            System.out.println( l.getText() );
        }

    };
}