package tree; import java.awt.*; import javax.swing.*; /** * This program shows a simple tree. * @version 1.03 2016-05-10 * @author Cay Horstmann */ public class SimpleTree { public static void main(String[] args) { EventQueue.invokeLater(() -> { JFrame frame = new SimpleTreeFrame(); frame.setTitle("SimpleTree"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); }); } }