package gui; /** * RUN: * javac gui/HelloSwing.java && java gui.HelloSwing * OUTPUT: * */ import javax.swing.*; public class HelloSwing { public static void main(String[] args) { JFrame frame = new JFrame("Hello Swing"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(300, 100); frame.setVisible(true); } }