Java Learning Note _gui (5)

Demo how to create a corresponding response function for a different button

1 Importjavax.swing.*;2 Importjava.awt.event.*;3 Importjava.awt.*;4 5 classMypanel_2extendsJPanel {6      Public voidpaintcomponent (Graphics g) {7G.fillrect (0, 0, This. GetWidth (), This. GetHeight ());8         intRed = (int) (Math.random () * 255);9         intGreen = (int) (Math.random () * 255);Ten         intBlue = (int) (Math.random () * 255); OneColor Randomcolor =NewColor (red, green, blue); A G.setcolor (randomcolor); -G.filloval (70, 40, 100, 100); -     } the } -  - classgui{ -      +JButton button =NewJButton ("Change Color"); -JButton Button_change_label =NewJButton ("Change label"); +JLabel label =NewJLabel ("I ' m a label"); AJFrame frame =NewJFrame (); at      -     Private voidSet_frame () { - frame.setdefaultcloseoperation (jframe.exit_on_close); -Frame.setsize (800, 600); -Frame.setvisible (true); -     } in      -      Public voidShow_my_panel () { to set_frame (); + Frame.getcontentpane (). Add (Borderlayout.south, button); -Button.addactionlistener (NewColorbuttonactionlistener ()); the  * Frame.getcontentpane (). Add (Borderlayout.east, Button_change_label); $Button_change_label.addactionlistener (NewLabelbuttonactionlistener ());Panax Notoginseng          - Frame.getcontentpane (). Add (borderlayout.west, label); the          +Frame.getcontentpane (). Add (Borderlayout.center,Newmypanel_2 ()); A     } the  +     classColorbuttonactionlistenerImplementsActionListener { -          Public voidactionperformed (ActionEvent event) { $ frame.repaint (); $         } -     } -  the     classLabelbuttonactionlistenerImplementsActionListener { -          Public voidactionperformed (ActionEvent event) {WuyiLabel.settext ("That hurt!"); the         } -     } Wu } -  About classGuitest { $      Public Static voidMain (string[] args) { -GUI GUI =NewGui (); - Gui.show_my_panel (); -     } A}

Java Learning Note _gui (5)