// a simple exmple that can show the basis of swing ------------------------------------------------------------------------- // import pakages which we need import javax.swing.*; import java.awt.*; public class HelloCsdn { public static void main(String[] args) { HelloCsdnFrame frame=new HelloCsdnFrame(); frame.setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE); frame.show(); } } /** this part we constrUCt a new frame HelloCsdnFrame */ -------------------------------------------------------------------------
class HelloCsdnFrame extends JFrame{ public HelloCsdnFrame() { setTitle("Hello CSDN.NET"); setSize(WIDTH，HEIGHT); HelloCsdnPanel panel=new HelloCsdnPanel(); Container c=getContentPane(); c.add(panel); } public static final int WIDTH=300; public static final int HEIGHT=200; } /**this part we extend our HelloCsdnFram to JFrame and construct a new object HelloCsdnPanel and add it on the frame /* -------------------------------------------------------------------- class HelloCsdnPanel extends JPanel{ public void paintComponent(Graphics g){ super.paintComponent(g); g.drawString("Hello CSDN.NET"，MESSAGE_X，MESSAGE_Y); } public static final int MESSAGE_X=100; public static final int MESSAGE_Y=100; } /** A panel that display a message
