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why i'm not getting graph (output)?

vishnu vardhan brundavanam
Greenhorn

Joined: Nov 13, 2010
Posts: 11
hi...everyone....
I created an applet which contains a manubar .In that menubar only one manuitem " load file..."(menu item) is there. Which is used to browse the a file which contains a number of values to draw the graph. By that values i want to draw a line graph .
my aim is that when ever i browse a new file , take the values form that and to draw new graph base on the old scale.(if i browsed two files ,then the graph should contain two line graphs ) ...
here is the calling one...

when we browse a file ,then it is reading the file data but,graph was displaying.......
here is the code....



a blank applet with menubar is appearing ....
could you tellme whats wrong with my code ...?
than you ....


Vishnu Vardhan Brundavanam.
Lester Burnham
Rancher

Joined: Oct 14, 2008
Posts: 1337
The applet does nothing by itself - what did you expect? If you're performing any UI actions, tell us what those are, what you expected to happen in response, and what actually happened.

By the way, this:

is almost never a good idea. At least print a message somewhere that an exception occurred.
Maneesh Godbole
Saloon Keeper

Joined: Jul 26, 2007
Posts: 10451
    
    8

After you load the data, you need to tell your canvas to draw the graphs. Invoke a repaint() on it.

Canvas is an AWT component. JApplet is a swing component. You will be better off using JPanel instead of Canvas. In case of Swing components, the recommended way is to override paintComponent() instead of paint()


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vishnu vardhan brundavanam
Greenhorn

Joined: Nov 13, 2010
Posts: 11
In this program my intention is to draw a graph with the help of GUI. Means when i click "load file"menuitem it should tacke a file and should draw a graph with the value which are in that file...
When i'm clicking "Load flie" menuitem,it is tacking file,but not drawing graph....that is my problem....
Maneesh Godbole
Saloon Keeper

Joined: Jul 26, 2007
Posts: 10451
    
    8

Maneesh Godbole wrote:After you load the data, you need to tell your canvas to draw the graphs. Invoke a repaint() on it.
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: why i'm not getting graph (output)?