Java JList Events With ListSelectionListener

Chapter: Swing Last Updated: 18-06-2017 15:02:15 UTC

Program:

            /* ............... START ............... */
                
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

public class JListEventsWithListSelectionListener {

	public static void main(String args[]) {
		String labels[] = { "A", "B", "C", "D", "E", "F", "G", "H" };
		JFrame frame = new JFrame("Selecting JList");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		JList jlist = new JList(labels);
		JScrollPane scrollPane1 = new JScrollPane(jlist);
		frame.add(scrollPane1, BorderLayout.CENTER);

		ListSelectionListener listSelectionListener = new ListSelectionListener() {
			public void valueChanged(ListSelectionEvent listSelectionEvent) {
				System.out.println("First index: " + listSelectionEvent.getFirstIndex());
				System.out.println(", Last index: " + listSelectionEvent.getLastIndex());
				boolean adjust = listSelectionEvent.getValueIsAdjusting();
				System.out.println(", Adjusting? " + adjust);
				if (!adjust) {
					JList list = (JList) listSelectionEvent.getSource();
					int selections[] = list.getSelectedIndices();
					Object selectionValues[] = list.getSelectedValues();
					for (int i = 0, n = selections.length; i < n; i++) {
						if (i == 0) {
							System.out.println(" Selections: ");
						}
						System.out.println(selections[i] + "/" + selectionValues[i] + " ");
					}
				}
			}
		};
		jlist.addListSelectionListener(listSelectionListener);

		frame.setSize(350, 200);
		frame.setVisible(true);
	}

}
                /* ............... END ............... */
        

Output


Java JList Events With ListSelectionListener

Tags

JList Events With ListSelectionListener, Java, Miscellaneous

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