Java Learning Note _gui (3)

How to join a panel of your own definition

1 Importjavax.swing.*;2 Importjava.awt.event.*;3 Importjava.awt.*;4 5 class Mypanel extends JPanel {6 public void paintcomponent (Graphics g) {7 G.setcolor (color.orange ); 8 G.fillrect (20, 50, 100, 100); 9}10} One  A  - classGuiImplementsactionlistener{ -      theJButton button =NewJButton ("Click Me"); -JFrame frame =NewJFrame (); -      -     Private voidSet_frame () { + frame.setdefaultcloseoperation (jframe.exit_on_close); -Frame.setsize (300, 200); +Frame.setvisible (true); A     } at  -      Public voidShow_button () { - set_frame (); - Frame.getcontentpane (). Add (button); -Button.addactionlistener ( This); -     } in      -      Public voidShow_my_panel () { to set_frame (); +         Frame.getcontentpane (). Add (New Mypanel ()); -     } the      *      Public voidactionperformed (ActionEvent event) { $Button.settext ("I ' ve been clicked!");Panax Notoginseng     } - } the  + classGuitest { A      Public Static voidMain (string[] args) { theGUI GUI =NewGui (); +         if(Args.length > 0 ) { - Gui.show_my_panel (); $         } $         Else { - Gui.show_button (); -         } the     } -}

Java Learning Note _gui (3)