创建 Frames import javax. swing. public class MyFrame t public static void main(string[] args) i JFrame frame new JFrame(Test Frame")i frame setsize(400, 300) frame. setvisible(true)i frame setDefaultcloseOperation JFrame.Ex工 T ON CLOSE);创建 Frames import javax.swing.*; public class MyFrame { public static void main(String[] args) { JFrame frame = new JFrame("Test Frame"); frame.setSize(400, 300); frame.setVisible(true); frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE); } }