Java tutorial
import java.awt.Dimension; import java.awt.FlowLayout; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JList; import javax.swing.JScrollPane; import javax.swing.event.ListSelectionEvent; import javax.swing.event.ListSelectionListener; public class Main { public static void main(String args[]) { JFrame f = new JFrame(); f.setSize(new Dimension(300, 300)); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setLayout(new FlowLayout()); JLabel label = new JLabel("Update"); String[] data = { "one", "two", "three", "four" }; JList<String> dataList = new JList<>(data); dataList.addListSelectionListener(new ListSelectionListener() { @Override public void valueChanged(ListSelectionEvent arg0) { if (!arg0.getValueIsAdjusting()) { label.setText(dataList.getSelectedValue().toString()); } } }); f.add(new JScrollPane(dataList)); f.add(label); f.setVisible(true); } }