Java-gui Development 99 Multiplication table

Java GUI Development 99 multiplication table

(1) Achieve the goal:

Using the Java-brought AWT package, the base control develops a 99 multiplication table, which can be clicked to display the corresponding multiplication formula.

(2) Control selection:

Click--button

Show--textfield

(3) interface design: Overall design layout

(4) Main form writing

Display the program in the center of the screen

　　

1 /*Window Center Display*/2             intWin_width=fr.getwidth ();3             intwin_height=fr.getheight ();4Toolkit kit = Toolkit.getdefaulttoolkit ();//Defining the Toolkit5Dimension screensize = Kit.getscreensize ();//get the size of the screen6             intScreenWidth = Screensize.width;//gets the width of the screen7             intScreenHeight = Screensize.height;//gets the height of the screen8Fr.setlocation (SCREENWIDTH/2-WIN_WIDTH/2, SCREENHEIGHT/2-WIN_HEIGHT/2);

Write Close Program

              /* Exit program */        Fr.addwindowlistener (New Java.awt.event.WindowAdapter ()        {public            void windowclosing ( Java.awt.event.WindowEvent e)            {                system.exit (0);            }        });            

(5) Frameinout form content and main algorithm

1 frameinout ()2         {3             Super("99 multiplication table");//Program Name4tx =NewTextField (20);5Tx.seteditable (false);6 Tx.setbackground (color.orange);7 Tx.setfont (f);8Tx.setbounds (490, 100, 230, 60);9 Add (TX);Ten              One             intI=0; A             intJ=0;  -              for(i=1;i<=9;i++) -             {        the                  for(j=1;j<=i;j++) -                 { -Button BTN =NewButton (String.valueof (j) + "X" +string.valueof (i) + "=" +string.valueof (i*j)); -Btn.setbounds (j-1) *80+10+ (j-1) *10, 40+ (i-1) *40, 80, 25);  +                 //Btn.setbackground (Color.cyan); - Add (BTN); +Btn.addactionlistener ( This); A                 } at                  -             } -                  -SetLayout (NULL); -SetSize (820,410); -SetVisible (true); in SetBackground (color.orange); -         } to          +          -          Public voidactionperformed (ActionEvent e) the         { *String s=E.getactioncommand (); $ Tx.settext (s);Panax Notoginseng}

(6) All codes

1  Packagep_3142;2     Importjava.awt.*;3     Importjava.awt.event.*;4     Importjava.io.IOException;5 6      Public classp3142 {7 8          Public Static voidMain (String args[])9         {Ten              OneFrame fr=Newframeinout (); A             /*Window Center Display*/ -             intWin_width=fr.getwidth (); -             intwin_height=fr.getheight (); theToolkit kit = Toolkit.getdefaulttoolkit ();//Defining the Toolkit -Dimension screensize = Kit.getscreensize ();//get the size of the screen -             intScreenWidth = Screensize.width;//gets the width of the screen -             intScreenHeight = Screensize.height;//gets the height of the screen +Fr.setlocation (SCREENWIDTH/2-WIN_WIDTH/2, SCREENHEIGHT/2-WIN_HEIGHT/2); -              +             /*Exit Program*/ AFr.addwindowlistener (NewJava.awt.event.WindowAdapter () at             { -                  Public voidwindowclosing (java.awt.event.WindowEvent e) -                 { -System.exit (0); -                 } -             }); in              -         } to     } +  -     classFrameinoutextendsFrameImplementsActionListener the     { * TextField TX; $ Label Lab;Panax NotoginsengFont f=NewFont ("Arial", Font.Bold, 40); -          the frameinout () +         { A             Super("99 multiplication table");//Program Name thetx =NewTextField (20); +Tx.seteditable (false); - Tx.setbackground (color.orange); $ Tx.setfont (f); $Tx.setbounds (490, 100, 230, 60); - Add (TX); -              the             intI=0; -             intJ=0; Wuyi              for(i=1;i<=9;i++) the             {        -                  for(j=1;j<=i;j++) Wu                 { -Button BTN =NewButton (String.valueof (j) + "X" +string.valueof (i) + "=" +string.valueof (i*j)); AboutBtn.setbounds (j-1) *80+10+ (j-1) *10, 40+ (i-1) *40, 80, 25);  $                 //Btn.setbackground (Color.cyan); - Add (BTN); -Btn.addactionlistener ( This); -                 } A                  +             } the                  -SetLayout (NULL); $SetSize (820,410); theSetVisible (true); the SetBackground (color.orange); the         } the          -          in          Public voidactionperformed (ActionEvent e) the         { theString s=E.getactioncommand (); About Tx.settext (s); the         } the          the     } +       

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Java-gui Development 99 Multiplication table